api: pull-requests fixed logic of ancestor calculation and target ref calculation based on the web view.

rhodecode/api/tests/test_create_pull_request.py

@@ -1,296 +1,311 b''
 # -*- coding: utf-8 -*-
 
 # Copyright (C) 2010-2018 RhodeCode GmbH
 #
 # This program is free software: you can redistribute it and/or modify
 # it under the terms of the GNU Affero General Public License, version 3
 # (only), as published by the Free Software Foundation.
 #
 # This program is distributed in the hope that it will be useful,
 # but WITHOUT ANY WARRANTY; without even the implied warranty of
 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 # GNU General Public License for more details.
 #
 # You should have received a copy of the GNU Affero General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #
 # This program is dual-licensed. If you wish to learn more about the
 # RhodeCode Enterprise Edition, including its added features, Support services,
 # and proprietary license terms, please see https://rhodecode.com/licenses/
 
 import pytest
 
 from rhodecode.model.db import User
 from rhodecode.model.pull_request import PullRequestModel
 from rhodecode.model.repo import RepoModel
 from rhodecode.model.user import UserModel
 from rhodecode.tests import TEST_USER_ADMIN_LOGIN, TEST_USER_REGULAR_LOGIN
 from rhodecode.api.tests.utils import build_data, api_call, assert_error
 
 
 @pytest.mark.usefixtures("testuser_api", "app")
 class TestCreatePullRequestApi(object):
     finalizers = []
 
     def teardown_method(self, method):
         if self.finalizers:
             for finalizer in self.finalizers:
                 finalizer()
             self.finalizers = []
 
     def test_create_with_wrong_data(self):
         required_data = {
             'source_repo': 'tests/source_repo',
             'target_repo': 'tests/target_repo',
             'source_ref': 'branch:default:initial',
             'target_ref': 'branch:default:new-feature',
         }
         for key in required_data:
             data = required_data.copy()
             data.pop(key)
             id_, params = build_data(
                 self.apikey, 'create_pull_request', **data)
             response = api_call(self.app, params)
 
             expected = 'Missing non optional `{}` arg in JSON DATA'.format(key)
             assert_error(id_, expected, given=response.body)
 
     @pytest.mark.backends("git", "hg")
     def test_create_with_correct_data(self, backend):
         data = self._prepare_data(backend)
         RepoModel().revoke_user_permission(
             self.source.repo_name, User.DEFAULT_USER)
         id_, params = build_data(
             self.apikey_regular, 'create_pull_request', **data)
         response = api_call(self.app, params)
         expected_message = "Created new pull request `{title}`".format(
             title=data['title'])
         result = response.json
         assert result['result']['msg'] == expected_message
         pull_request_id = result['result']['pull_request_id']
         pull_request = PullRequestModel().get(pull_request_id)
         assert pull_request.title == data['title']
         assert pull_request.description == data['description']
         assert pull_request.source_ref == data['source_ref']
         assert pull_request.target_ref == data['target_ref']
         assert pull_request.source_repo.repo_name == data['source_repo']
         assert pull_request.target_repo.repo_name == data['target_repo']
         assert pull_request.revisions == [self.commit_ids['change']]
         assert len(pull_request.reviewers) == 1
 
     @pytest.mark.backends("git", "hg")
     def test_create_with_empty_description(self, backend):
         data = self._prepare_data(backend)
         data.pop('description')
         id_, params = build_data(
             self.apikey_regular, 'create_pull_request', **data)
         response = api_call(self.app, params)
         expected_message = "Created new pull request `{title}`".format(
             title=data['title'])
         result = response.json
         assert result['result']['msg'] == expected_message
         pull_request_id = result['result']['pull_request_id']
         pull_request = PullRequestModel().get(pull_request_id)
         assert pull_request.description == ''
 
     @pytest.mark.backends("git", "hg")
+    def test_create_with_empty_title(self, backend):
+        data = self._prepare_data(backend)
+        data.pop('title')
+        id_, params = build_data(
+            self.apikey_regular, 'create_pull_request', **data)
+        response = api_call(self.app, params)
+        result = response.json
+        pull_request_id = result['result']['pull_request_id']
+        pull_request = PullRequestModel().get(pull_request_id)
+        data['ref'] = backend.default_branch_name
+        title = '{source_repo}#{ref} to {target_repo}'.format(**data)
+        assert pull_request.title == title
+
+    @pytest.mark.backends("git", "hg")
     def test_create_with_reviewers_specified_by_names(
             self, backend, no_notifications):
         data = self._prepare_data(backend)
         reviewers = [
             {'username': TEST_USER_REGULAR_LOGIN,
              'reasons': ['added manually']},
             {'username': TEST_USER_ADMIN_LOGIN,
              'reasons': ['added manually']},
         ]
         data['reviewers'] = reviewers
         id_, params = build_data(
             self.apikey_regular, 'create_pull_request', **data)
         response = api_call(self.app, params)
 
         expected_message = "Created new pull request `{title}`".format(
             title=data['title'])
         result = response.json
         assert result['result']['msg'] == expected_message
         pull_request_id = result['result']['pull_request_id']
         pull_request = PullRequestModel().get(pull_request_id)
         actual_reviewers = [
             {'username': r.user.username,
              'reasons': ['added manually'],
              } for r in pull_request.reviewers
         ]
         assert sorted(actual_reviewers) == sorted(reviewers)
 
     @pytest.mark.backends("git", "hg")
     def test_create_with_reviewers_specified_by_ids(
             self, backend, no_notifications):
         data = self._prepare_data(backend)
         reviewers = [
             {'username': UserModel().get_by_username(
                 TEST_USER_REGULAR_LOGIN).user_id,
              'reasons': ['added manually']},
             {'username': UserModel().get_by_username(
                 TEST_USER_ADMIN_LOGIN).user_id,
              'reasons': ['added manually']},
         ]
 
         data['reviewers'] = reviewers
         id_, params = build_data(
             self.apikey_regular, 'create_pull_request', **data)
         response = api_call(self.app, params)
 
         expected_message = "Created new pull request `{title}`".format(
             title=data['title'])
         result = response.json
         assert result['result']['msg'] == expected_message
         pull_request_id = result['result']['pull_request_id']
         pull_request = PullRequestModel().get(pull_request_id)
         actual_reviewers = [
             {'username': r.user.user_id,
              'reasons': ['added manually'],
              } for r in pull_request.reviewers
         ]
         assert sorted(actual_reviewers) == sorted(reviewers)
 
     @pytest.mark.backends("git", "hg")
     def test_create_fails_when_the_reviewer_is_not_found(self, backend):
         data = self._prepare_data(backend)
         data['reviewers'] = [{'username': 'somebody'}]
         id_, params = build_data(
             self.apikey_regular, 'create_pull_request', **data)
         response = api_call(self.app, params)
         expected_message = 'user `somebody` does not exist'
         assert_error(id_, expected_message, given=response.body)
 
     @pytest.mark.backends("git", "hg")
     def test_cannot_create_with_reviewers_in_wrong_format(self, backend):
         data = self._prepare_data(backend)
         reviewers = ','.join([TEST_USER_REGULAR_LOGIN, TEST_USER_ADMIN_LOGIN])
         data['reviewers'] = reviewers
         id_, params = build_data(
             self.apikey_regular, 'create_pull_request', **data)
         response = api_call(self.app, params)
         expected_message = {u'': '"test_regular,test_admin" is not iterable'}
         assert_error(id_, expected_message, given=response.body)
 
     @pytest.mark.backends("git", "hg")
     def test_create_with_no_commit_hashes(self, backend):
         data = self._prepare_data(backend)
         expected_source_ref = data['source_ref']
         expected_target_ref = data['target_ref']
         data['source_ref'] = 'branch:{}'.format(backend.default_branch_name)
         data['target_ref'] = 'branch:{}'.format(backend.default_branch_name)
         id_, params = build_data(
             self.apikey_regular, 'create_pull_request', **data)
         response = api_call(self.app, params)
         expected_message = "Created new pull request `{title}`".format(
             title=data['title'])
         result = response.json
         assert result['result']['msg'] == expected_message
         pull_request_id = result['result']['pull_request_id']
         pull_request = PullRequestModel().get(pull_request_id)
         assert pull_request.source_ref == expected_source_ref
         assert pull_request.target_ref == expected_target_ref
 
     @pytest.mark.backends("git", "hg")
     @pytest.mark.parametrize("data_key", ["source_repo", "target_repo"])
     def test_create_fails_with_wrong_repo(self, backend, data_key):
         repo_name = 'fake-repo'
         data = self._prepare_data(backend)
         data[data_key] = repo_name
         id_, params = build_data(
             self.apikey_regular, 'create_pull_request', **data)
         response = api_call(self.app, params)
         expected_message = 'repository `{}` does not exist'.format(repo_name)
         assert_error(id_, expected_message, given=response.body)
 
     @pytest.mark.backends("git", "hg")
     @pytest.mark.parametrize("data_key", ["source_ref", "target_ref"])
     def test_create_fails_with_non_existing_branch(self, backend, data_key):
         branch_name = 'test-branch'
         data = self._prepare_data(backend)
         data[data_key] = "branch:{}".format(branch_name)
         id_, params = build_data(
             self.apikey_regular, 'create_pull_request', **data)
         response = api_call(self.app, params)
         expected_message = 'The specified branch `{}` does not exist'.format(
             branch_name)
         assert_error(id_, expected_message, given=response.body)
 
     @pytest.mark.backends("git", "hg")
     @pytest.mark.parametrize("data_key", ["source_ref", "target_ref"])
     def test_create_fails_with_ref_in_a_wrong_format(self, backend, data_key):
         data = self._prepare_data(backend)
         ref = 'stange-ref'
         data[data_key] = ref
         id_, params = build_data(
             self.apikey_regular, 'create_pull_request', **data)
         response = api_call(self.app, params)
         expected_message = (
             'Ref `{ref}` given in a wrong format. Please check the API'
             ' documentation for more details'.format(ref=ref))
         assert_error(id_, expected_message, given=response.body)
 
     @pytest.mark.backends("git", "hg")
     @pytest.mark.parametrize("data_key", ["source_ref", "target_ref"])
     def test_create_fails_with_non_existing_ref(self, backend, data_key):
         commit_id = 'aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa10'
         ref = self._get_full_ref(backend, commit_id)
         data = self._prepare_data(backend)
         data[data_key] = ref
         id_, params = build_data(
             self.apikey_regular, 'create_pull_request', **data)
         response = api_call(self.app, params)
         expected_message = 'Ref `{}` does not exist'.format(ref)
         assert_error(id_, expected_message, given=response.body)
 
     @pytest.mark.backends("git", "hg")
     def test_create_fails_when_no_revisions(self, backend):
         data = self._prepare_data(backend, source_head='initial')
         id_, params = build_data(
             self.apikey_regular, 'create_pull_request', **data)
         response = api_call(self.app, params)
         expected_message = 'no commits found'
         assert_error(id_, expected_message, given=response.body)
 
     @pytest.mark.backends("git", "hg")
     def test_create_fails_when_no_permissions(self, backend):
         data = self._prepare_data(backend)
         RepoModel().revoke_user_permission(
             self.source.repo_name, User.DEFAULT_USER)
         RepoModel().revoke_user_permission(
             self.source.repo_name, self.test_user)
         id_, params = build_data(
             self.apikey_regular, 'create_pull_request', **data)
         response = api_call(self.app, params)
         expected_message = 'repository `{}` does not exist'.format(
             self.source.repo_name)
         assert_error(id_, expected_message, given=response.body)
 
     def _prepare_data(
             self, backend, source_head='change', target_head='initial'):
         commits = [
             {'message': 'initial'},
             {'message': 'change'},
             {'message': 'new-feature', 'parents': ['initial']},
         ]
         self.commit_ids = backend.create_master_repo(commits)
         self.source = backend.create_repo(heads=[source_head])
         self.target = backend.create_repo(heads=[target_head])
+
         data = {
             'source_repo': self.source.repo_name,
             'target_repo': self.target.repo_name,
             'source_ref': self._get_full_ref(
                 backend, self.commit_ids[source_head]),
             'target_ref': self._get_full_ref(
                 backend, self.commit_ids[target_head]),
             'title': 'Test PR 1',
             'description': 'Test'
         }
         RepoModel().grant_user_permission(
             self.source.repo_name, self.TEST_USER_LOGIN, 'repository.read')
         return data
 
     def _get_full_ref(self, backend, commit_id):
         return 'branch:{branch}:{commit_id}'.format(
             branch=backend.default_branch_name, commit_id=commit_id)

rhodecode/api/views/pull_request_api.py

@@ -1,913 +1,919 b''
 # -*- coding: utf-8 -*-
 
 # Copyright (C) 2011-2018 RhodeCode GmbH
 #
 # This program is free software: you can redistribute it and/or modify
 # it under the terms of the GNU Affero General Public License, version 3
 # (only), as published by the Free Software Foundation.
 #
 # This program is distributed in the hope that it will be useful,
 # but WITHOUT ANY WARRANTY; without even the implied warranty of
 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 # GNU General Public License for more details.
 #
 # You should have received a copy of the GNU Affero General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #
 # This program is dual-licensed. If you wish to learn more about the
 # RhodeCode Enterprise Edition, including its added features, Support services,
 # and proprietary license terms, please see https://rhodecode.com/licenses/
 
 
 import logging
 
 from rhodecode import events
 from rhodecode.api import jsonrpc_method, JSONRPCError, JSONRPCValidationError
 from rhodecode.api.utils import (
     has_superadmin_permission, Optional, OAttr, get_repo_or_error,
     get_pull_request_or_error, get_commit_or_error, get_user_or_error,
     validate_repo_permissions, resolve_ref_or_error)
 from rhodecode.lib.auth import (HasRepoPermissionAnyApi)
 from rhodecode.lib.base import vcs_operation_context
 from rhodecode.lib.utils2 import str2bool
 from rhodecode.model.changeset_status import ChangesetStatusModel
 from rhodecode.model.comment import CommentsModel
 from rhodecode.model.db import Session, ChangesetStatus, ChangesetComment
 from rhodecode.model.pull_request import PullRequestModel, MergeCheck
 from rhodecode.model.settings import SettingsModel
 from rhodecode.model.validation_schema import Invalid
 from rhodecode.model.validation_schema.schemas.reviewer_schema import(
     ReviewerListSchema)
 
 log = logging.getLogger(__name__)
 
 
 @jsonrpc_method()
 def get_pull_request(request, apiuser, pullrequestid, repoid=Optional(None)):
     """
     Get a pull request based on the given ID.
 
     :param apiuser: This is filled automatically from the |authtoken|.
     :type apiuser: AuthUser
     :param repoid: Optional, repository name or repository ID from where
         the pull request was opened.
     :type repoid: str or int
     :param pullrequestid: ID of the requested pull request.
     :type pullrequestid: int
 
     Example output:
 
     .. code-block:: bash
 
       "id": <id_given_in_input>,
       "result":
         {
             "pull_request_id":   "<pull_request_id>",
             "url":               "<url>",
             "title":             "<title>",
             "description":       "<description>",
             "status" :           "<status>",
             "created_on":        "<date_time_created>",
             "updated_on":        "<date_time_updated>",
             "commit_ids":        [
                                      ...
                                      "<commit_id>",
                                      "<commit_id>",
                                      ...
                                  ],
             "review_status":    "<review_status>",
             "mergeable":         {
                                      "status":  "<bool>",
                                      "message": "<message>",
                                  },
             "source":            {
                                      "clone_url":     "<clone_url>",
                                      "repository":    "<repository_name>",
                                      "reference":
                                      {
                                          "name":      "<name>",
                                          "type":      "<type>",
                                          "commit_id": "<commit_id>",
                                      }
                                  },
             "target":            {
                                      "clone_url":   "<clone_url>",
                                      "repository":    "<repository_name>",
                                      "reference":
                                      {
                                          "name":      "<name>",
                                          "type":      "<type>",
                                          "commit_id": "<commit_id>",
                                      }
                                  },
             "merge":             {
                                      "clone_url":   "<clone_url>",
                                      "reference":
                                      {
                                          "name":      "<name>",
                                          "type":      "<type>",
                                          "commit_id": "<commit_id>",
                                      }
                                  },
            "author":             <user_obj>,
            "reviewers":          [
                                      ...
                                      {
                                         "user":          "<user_obj>",
                                         "review_status": "<review_status>",
                                      }
                                      ...
                                  ]
         },
        "error": null
     """
 
     pull_request = get_pull_request_or_error(pullrequestid)
     if Optional.extract(repoid):
         repo = get_repo_or_error(repoid)
     else:
         repo = pull_request.target_repo
 
     if not PullRequestModel().check_user_read(
             pull_request, apiuser, api=True):
         raise JSONRPCError('repository `%s` or pull request `%s` '
                            'does not exist' % (repoid, pullrequestid))
     data = pull_request.get_api_data()
     return data
 
 
 @jsonrpc_method()
 def get_pull_requests(request, apiuser, repoid, status=Optional('new')):
     """
     Get all pull requests from the repository specified in `repoid`.
 
     :param apiuser: This is filled automatically from the |authtoken|.
     :type apiuser: AuthUser
     :param repoid: Optional repository name or repository ID.
     :type repoid: str or int
     :param status: Only return pull requests with the specified status.
         Valid options are.
         * ``new`` (default)
         * ``open``
         * ``closed``
     :type status: str
 
     Example output:
 
     .. code-block:: bash
 
       "id": <id_given_in_input>,
       "result":
         [
             ...
             {
                 "pull_request_id":   "<pull_request_id>",
                 "url":               "<url>",
                 "title" :            "<title>",
                 "description":       "<description>",
                 "status":            "<status>",
                 "created_on":        "<date_time_created>",
                 "updated_on":        "<date_time_updated>",
                 "commit_ids":        [
                                          ...
                                          "<commit_id>",
                                          "<commit_id>",
                                          ...
                                      ],
                 "review_status":    "<review_status>",
                 "mergeable":         {
                                         "status":      "<bool>",
                                         "message:      "<message>",
                                      },
                 "source":            {
                                          "clone_url":     "<clone_url>",
                                          "reference":
                                          {
                                              "name":      "<name>",
                                              "type":      "<type>",
                                              "commit_id": "<commit_id>",
                                          }
                                      },
                 "target":            {
                                          "clone_url":   "<clone_url>",
                                          "reference":
                                          {
                                              "name":      "<name>",
                                              "type":      "<type>",
                                              "commit_id": "<commit_id>",
                                          }
                                      },
                 "merge":             {
                                          "clone_url":   "<clone_url>",
                                          "reference":
                                          {
                                              "name":      "<name>",
                                              "type":      "<type>",
                                              "commit_id": "<commit_id>",
                                          }
                                      },
                "author":             <user_obj>,
                "reviewers":          [
                                          ...
                                          {
                                             "user":          "<user_obj>",
                                             "review_status": "<review_status>",
                                          }
                                          ...
                                      ]
             }
             ...
         ],
       "error": null
 
     """
     repo = get_repo_or_error(repoid)
     if not has_superadmin_permission(apiuser):
         _perms = (
             'repository.admin', 'repository.write', 'repository.read',)
         validate_repo_permissions(apiuser, repoid, repo, _perms)
 
     status = Optional.extract(status)
     pull_requests = PullRequestModel().get_all(repo, statuses=[status])
     data = [pr.get_api_data() for pr in pull_requests]
     return data
 
 
 @jsonrpc_method()
 def merge_pull_request(
         request, apiuser, pullrequestid, repoid=Optional(None),
         userid=Optional(OAttr('apiuser'))):
     """
     Merge the pull request specified by `pullrequestid` into its target
     repository.
 
     :param apiuser: This is filled automatically from the |authtoken|.
     :type apiuser: AuthUser
     :param repoid: Optional, repository name or repository ID of the
         target repository to which the |pr| is to be merged.
     :type repoid: str or int
     :param pullrequestid: ID of the pull request which shall be merged.
     :type pullrequestid: int
     :param userid: Merge the pull request as this user.
     :type userid: Optional(str or int)
 
     Example output:
 
     .. code-block:: bash
 
         "id": <id_given_in_input>,
         "result": {
             "executed":         "<bool>",
             "failure_reason":   "<int>",
             "merge_commit_id":  "<merge_commit_id>",
             "possible":         "<bool>",
             "merge_ref":        {
                                     "commit_id": "<commit_id>",
                                     "type":      "<type>",
                                     "name":      "<name>"
                                 }
         },
         "error": null
     """
     pull_request = get_pull_request_or_error(pullrequestid)
     if Optional.extract(repoid):
         repo = get_repo_or_error(repoid)
     else:
         repo = pull_request.target_repo
 
     if not isinstance(userid, Optional):
         if (has_superadmin_permission(apiuser) or
                 HasRepoPermissionAnyApi('repository.admin')(
                     user=apiuser, repo_name=repo.repo_name)):
             apiuser = get_user_or_error(userid)
         else:
             raise JSONRPCError('userid is not the same as your user')
 
     check = MergeCheck.validate(
         pull_request, user=apiuser, translator=request.translate)
     merge_possible = not check.failed
 
     if not merge_possible:
         error_messages = []
         for err_type, error_msg in check.errors:
             error_msg = request.translate(error_msg)
             error_messages.append(error_msg)
 
         reasons = ','.join(error_messages)
         raise JSONRPCError(
             'merge not possible for following reasons: {}'.format(reasons))
 
     target_repo = pull_request.target_repo
     extras = vcs_operation_context(
         request.environ, repo_name=target_repo.repo_name,
         username=apiuser.username, action='push',
         scm=target_repo.repo_type)
     merge_response = PullRequestModel().merge_repo(
         pull_request, apiuser, extras=extras)
     if merge_response.executed:
         PullRequestModel().close_pull_request(
             pull_request.pull_request_id, apiuser)
 
         Session().commit()
 
     # In previous versions the merge response directly contained the merge
     # commit id. It is now contained in the merge reference object. To be
     # backwards compatible we have to extract it again.
     merge_response = merge_response._asdict()
     merge_response['merge_commit_id'] = merge_response['merge_ref'].commit_id
 
     return merge_response
 
 
 @jsonrpc_method()
 def get_pull_request_comments(
         request, apiuser, pullrequestid, repoid=Optional(None)):
     """
     Get all comments of pull request specified with the `pullrequestid`
 
     :param apiuser: This is filled automatically from the |authtoken|.
     :type apiuser: AuthUser
     :param repoid: Optional repository name or repository ID.
     :type repoid: str or int
     :param pullrequestid: The pull request ID.
     :type pullrequestid: int
 
     Example output:
 
     .. code-block:: bash
 
         id : <id_given_in_input>
         result : [
             {
               "comment_author": {
                 "active": true,
                 "full_name_or_username": "Tom Gore",
                 "username": "admin"
               },
               "comment_created_on": "2017-01-02T18:43:45.533",
               "comment_f_path": null,
               "comment_id": 25,
               "comment_lineno": null,
               "comment_status": {
                 "status": "under_review",
                 "status_lbl": "Under Review"
               },
               "comment_text": "Example text",
               "comment_type": null,
               "pull_request_version": null
             }
         ],
         error :  null
     """
 
     pull_request = get_pull_request_or_error(pullrequestid)
     if Optional.extract(repoid):
         repo = get_repo_or_error(repoid)
     else:
         repo = pull_request.target_repo
 
     if not PullRequestModel().check_user_read(
             pull_request, apiuser, api=True):
         raise JSONRPCError('repository `%s` or pull request `%s` '
                            'does not exist' % (repoid, pullrequestid))
 
     (pull_request_latest,
      pull_request_at_ver,
      pull_request_display_obj,
      at_version) = PullRequestModel().get_pr_version(
         pull_request.pull_request_id, version=None)
 
     versions = pull_request_display_obj.versions()
     ver_map = {
         ver.pull_request_version_id: cnt
         for cnt, ver in enumerate(versions, 1)
     }
 
     # GENERAL COMMENTS with versions #
     q = CommentsModel()._all_general_comments_of_pull_request(pull_request)
     q = q.order_by(ChangesetComment.comment_id.asc())
     general_comments = q.all()
 
     # INLINE COMMENTS with versions  #
     q = CommentsModel()._all_inline_comments_of_pull_request(pull_request)
     q = q.order_by(ChangesetComment.comment_id.asc())
     inline_comments = q.all()
 
     data = []
     for comment in inline_comments + general_comments:
         full_data = comment.get_api_data()
         pr_version_id = None
         if comment.pull_request_version_id:
             pr_version_id = 'v{}'.format(
                 ver_map[comment.pull_request_version_id])
 
         # sanitize some entries
 
         full_data['pull_request_version'] = pr_version_id
         full_data['comment_author'] = {
             'username': full_data['comment_author'].username,
             'full_name_or_username': full_data['comment_author'].full_name_or_username,
             'active': full_data['comment_author'].active,
         }
 
         if full_data['comment_status']:
             full_data['comment_status'] = {
                 'status': full_data['comment_status'][0].status,
                 'status_lbl': full_data['comment_status'][0].status_lbl,
             }
         else:
             full_data['comment_status'] = {}
 
         data.append(full_data)
     return data
 
 
 @jsonrpc_method()
 def comment_pull_request(
         request, apiuser, pullrequestid, repoid=Optional(None),
         message=Optional(None), commit_id=Optional(None), status=Optional(None),
         comment_type=Optional(ChangesetComment.COMMENT_TYPE_NOTE),
         resolves_comment_id=Optional(None),
         userid=Optional(OAttr('apiuser'))):
     """
     Comment on the pull request specified with the `pullrequestid`,
     in the |repo| specified by the `repoid`, and optionally change the
     review status.
 
     :param apiuser: This is filled automatically from the |authtoken|.
     :type apiuser: AuthUser
     :param repoid: Optional repository name or repository ID.
     :type repoid: str or int
     :param pullrequestid: The pull request ID.
     :type pullrequestid: int
     :param commit_id: Specify the commit_id for which to set a comment. If
         given commit_id is different than latest in the PR status
         change won't be performed.
     :type commit_id: str
     :param message: The text content of the comment.
     :type message: str
     :param status: (**Optional**) Set the approval status of the pull
         request. One of: 'not_reviewed', 'approved', 'rejected',
         'under_review'
     :type status: str
     :param comment_type: Comment type, one of: 'note', 'todo'
     :type comment_type: Optional(str), default: 'note'
     :param userid: Comment on the pull request as this user
     :type userid: Optional(str or int)
 
     Example output:
 
     .. code-block:: bash
 
         id : <id_given_in_input>
         result : {
             "pull_request_id":  "<Integer>",
             "comment_id":       "<Integer>",
             "status": {"given": <given_status>,
                        "was_changed": <bool status_was_actually_changed> },
         },
         error :  null
     """
     pull_request = get_pull_request_or_error(pullrequestid)
     if Optional.extract(repoid):
         repo = get_repo_or_error(repoid)
     else:
         repo = pull_request.target_repo
 
     if not isinstance(userid, Optional):
         if (has_superadmin_permission(apiuser) or
                 HasRepoPermissionAnyApi('repository.admin')(
                     user=apiuser, repo_name=repo.repo_name)):
             apiuser = get_user_or_error(userid)
         else:
             raise JSONRPCError('userid is not the same as your user')
 
     if not PullRequestModel().check_user_read(
             pull_request, apiuser, api=True):
         raise JSONRPCError('repository `%s` does not exist' % (repoid,))
     message = Optional.extract(message)
     status = Optional.extract(status)
     commit_id = Optional.extract(commit_id)
     comment_type = Optional.extract(comment_type)
     resolves_comment_id = Optional.extract(resolves_comment_id)
 
     if not message and not status:
         raise JSONRPCError(
             'Both message and status parameters are missing. '
             'At least one is required.')
 
     if (status not in (st[0] for st in ChangesetStatus.STATUSES) and
             status is not None):
         raise JSONRPCError('Unknown comment status: `%s`' % status)
 
     if commit_id and commit_id not in pull_request.revisions:
         raise JSONRPCError(
             'Invalid commit_id `%s` for this pull request.' % commit_id)
 
     allowed_to_change_status = PullRequestModel().check_user_change_status(
         pull_request, apiuser)
 
     # if commit_id is passed re-validated if user is allowed to change status
     # based on latest commit_id from the PR
     if commit_id:
         commit_idx = pull_request.revisions.index(commit_id)
         if commit_idx != 0:
             allowed_to_change_status = False
 
     if resolves_comment_id:
         comment = ChangesetComment.get(resolves_comment_id)
         if not comment:
             raise JSONRPCError(
                 'Invalid resolves_comment_id `%s` for this pull request.'
                 % resolves_comment_id)
         if comment.comment_type != ChangesetComment.COMMENT_TYPE_TODO:
             raise JSONRPCError(
                 'Comment `%s` is wrong type for setting status to resolved.'
                 % resolves_comment_id)
 
     text = message
     status_label = ChangesetStatus.get_status_lbl(status)
     if status and allowed_to_change_status:
         st_message = ('Status change %(transition_icon)s %(status)s'
                       % {'transition_icon': '>', 'status': status_label})
         text = message or st_message
 
     rc_config = SettingsModel().get_all_settings()
     renderer = rc_config.get('rhodecode_markup_renderer', 'rst')
 
     status_change = status and allowed_to_change_status
     comment = CommentsModel().create(
         text=text,
         repo=pull_request.target_repo.repo_id,
         user=apiuser.user_id,
         pull_request=pull_request.pull_request_id,
         f_path=None,
         line_no=None,
         status_change=(status_label if status_change else None),
         status_change_type=(status if status_change else None),
         closing_pr=False,
         renderer=renderer,
         comment_type=comment_type,
         resolves_comment_id=resolves_comment_id,
         auth_user=apiuser
     )
 
     if allowed_to_change_status and status:
         ChangesetStatusModel().set_status(
             pull_request.target_repo.repo_id,
             status,
             apiuser.user_id,
             comment,
             pull_request=pull_request.pull_request_id
         )
         Session().flush()
 
     Session().commit()
     data = {
         'pull_request_id': pull_request.pull_request_id,
         'comment_id': comment.comment_id if comment else None,
         'status': {'given': status, 'was_changed': status_change},
     }
     return data
 
 
 @jsonrpc_method()
 def create_pull_request(
         request, apiuser, source_repo, target_repo, source_ref, target_ref,
         title=Optional(''), description=Optional(''), reviewers=Optional(None)):
     """
     Creates a new pull request.
 
     Accepts refs in the following formats:
 
         * branch:<branch_name>:<sha>
         * branch:<branch_name>
         * bookmark:<bookmark_name>:<sha> (Mercurial only)
         * bookmark:<bookmark_name> (Mercurial only)
 
     :param apiuser: This is filled automatically from the |authtoken|.
     :type apiuser: AuthUser
     :param source_repo: Set the source repository name.
     :type source_repo: str
     :param target_repo: Set the target repository name.
     :type target_repo: str
     :param source_ref: Set the source ref name.
     :type source_ref: str
     :param target_ref: Set the target ref name.
     :type target_ref: str
     :param title: Optionally Set the pull request title, it's generated otherwise
     :type title: str
     :param description: Set the pull request description.
     :type description: Optional(str)
     :param reviewers: Set the new pull request reviewers list.
         Reviewer defined by review rules will be added automatically to the
         defined list.
     :type reviewers: Optional(list)
         Accepts username strings or objects of the format:
 
             [{'username': 'nick', 'reasons': ['original author'], 'mandatory': <bool>}]
     """
 
     source_db_repo =  get_repo_or_error(source_repo)
     target_db_repo = get_repo_or_error(target_repo)
     if not has_superadmin_permission(apiuser):
         _perms = ('repository.admin', 'repository.write', 'repository.read',)
         validate_repo_permissions(apiuser, source_repo, source_db_repo, _perms)
 
     full_source_ref = resolve_ref_or_error(source_ref, source_db_repo)
     full_target_ref = resolve_ref_or_error(target_ref, target_db_repo)
+
+    source_scm = source_db_repo.scm_instance()
+    target_scm = target_db_repo.scm_instance()
+
     source_commit = get_commit_or_error(full_source_ref, source_db_repo)
     target_commit = get_commit_or_error(full_target_ref, target_db_repo)
-    source_scm = source_db_repo.scm_instance()
-    target_scm = target_db_repo.scm_instance()
+
+    ancestor = source_scm.get_common_ancestor(
+        source_commit.raw_id, target_commit.raw_id, target_scm)
+    if not ancestor:
+        raise JSONRPCError('no common ancestor found')
+
+    # recalculate target ref based on ancestor
+    target_ref_type, target_ref_name, __ = full_target_ref.split(':')
+    full_target_ref = ':'.join((target_ref_type, target_ref_name, ancestor))
 
     commit_ranges = target_scm.compare(
         target_commit.raw_id, source_commit.raw_id, source_scm,
         merge=True, pre_load=[])
 
-    ancestor = target_scm.get_common_ancestor(
-        target_commit.raw_id, source_commit.raw_id, source_scm)
-
     if not commit_ranges:
         raise JSONRPCError('no commits found')
 
-    if not ancestor:
-        raise JSONRPCError('no common ancestor found')
-
     reviewer_objects = Optional.extract(reviewers) or []
 
     if reviewer_objects:
         schema = ReviewerListSchema()
         try:
             reviewer_objects = schema.deserialize(reviewer_objects)
         except Invalid as err:
             raise JSONRPCValidationError(colander_exc=err)
 
         # validate users
         for reviewer_object in reviewer_objects:
             user = get_user_or_error(reviewer_object['username'])
             reviewer_object['user_id'] = user.user_id
 
     get_default_reviewers_data, get_validated_reviewers = \
         PullRequestModel().get_reviewer_functions()
 
     reviewer_rules = get_default_reviewers_data(
         apiuser.get_instance(), source_db_repo,
         source_commit, target_db_repo, target_commit)
 
     # specified rules are later re-validated, thus we can assume users will
     # eventually provide those that meet the reviewer criteria.
     if not reviewer_objects:
         reviewer_objects = reviewer_rules['reviewers']
 
     try:
         reviewers = get_validated_reviewers(
             reviewer_objects, reviewer_rules)
     except ValueError as e:
         raise JSONRPCError('Reviewers Validation: {}'.format(e))
 
     title = Optional.extract(title)
     if not title:
         title_source_ref = source_ref.split(':', 2)[1]
         title = PullRequestModel().generate_pullrequest_title(
             source=source_repo,
             source_ref=title_source_ref,
             target=target_repo
         )
+    description = Optional.extract(description)
 
     pull_request = PullRequestModel().create(
         created_by=apiuser.user_id,
         source_repo=source_repo,
         source_ref=full_source_ref,
         target_repo=target_repo,
         target_ref=full_target_ref,
         revisions=[commit.raw_id for commit in reversed(commit_ranges)],
         reviewers=reviewers,
         title=title,
-        description=Optional.extract(description),
+        description=description,
         reviewer_data=reviewer_rules,
         auth_user=apiuser
     )
 
     Session().commit()
     data = {
         'msg': 'Created new pull request `{}`'.format(title),
         'pull_request_id': pull_request.pull_request_id,
     }
     return data
 
 
 @jsonrpc_method()
 def update_pull_request(
         request, apiuser, pullrequestid, repoid=Optional(None),
         title=Optional(''), description=Optional(''), reviewers=Optional(None),
         update_commits=Optional(None)):
     """
     Updates a pull request.
 
     :param apiuser: This is filled automatically from the |authtoken|.
     :type apiuser: AuthUser
     :param repoid: Optional repository name or repository ID.
     :type repoid: str or int
     :param pullrequestid: The pull request ID.
     :type pullrequestid: int
     :param title: Set the pull request title.
     :type title: str
     :param description: Update pull request description.
     :type description: Optional(str)
     :param reviewers: Update pull request reviewers list with new value.
     :type reviewers: Optional(list)
         Accepts username strings or objects of the format:
 
             [{'username': 'nick', 'reasons': ['original author'], 'mandatory': <bool>}]
 
     :param update_commits: Trigger update of commits for this pull request
     :type: update_commits: Optional(bool)
 
     Example output:
 
     .. code-block:: bash
 
         id : <id_given_in_input>
         result : {
             "msg": "Updated pull request `63`",
             "pull_request": <pull_request_object>,
             "updated_reviewers": {
               "added": [
                 "username"
               ],
               "removed": []
             },
             "updated_commits": {
               "added": [
                 "<sha1_hash>"
               ],
               "common": [
                 "<sha1_hash>",
                 "<sha1_hash>",
               ],
               "removed": []
             }
         }
         error :  null
     """
 
     pull_request = get_pull_request_or_error(pullrequestid)
     if Optional.extract(repoid):
         repo = get_repo_or_error(repoid)
     else:
         repo = pull_request.target_repo
 
     if not PullRequestModel().check_user_update(
             pull_request, apiuser, api=True):
         raise JSONRPCError(
             'pull request `%s` update failed, no permission to update.' % (
                 pullrequestid,))
     if pull_request.is_closed():
         raise JSONRPCError(
             'pull request `%s` update failed, pull request is closed' % (
                 pullrequestid,))
 
     reviewer_objects = Optional.extract(reviewers) or []
 
     if reviewer_objects:
         schema = ReviewerListSchema()
         try:
             reviewer_objects = schema.deserialize(reviewer_objects)
         except Invalid as err:
             raise JSONRPCValidationError(colander_exc=err)
 
         # validate users
         for reviewer_object in reviewer_objects:
             user = get_user_or_error(reviewer_object['username'])
             reviewer_object['user_id'] = user.user_id
 
         get_default_reviewers_data, get_validated_reviewers = \
             PullRequestModel().get_reviewer_functions()
 
         # re-use stored rules
         reviewer_rules = pull_request.reviewer_data
         try:
             reviewers = get_validated_reviewers(
                 reviewer_objects, reviewer_rules)
         except ValueError as e:
             raise JSONRPCError('Reviewers Validation: {}'.format(e))
     else:
         reviewers = []
 
     title = Optional.extract(title)
     description = Optional.extract(description)
     if title or description:
         PullRequestModel().edit(
             pull_request, title or pull_request.title,
             description or pull_request.description, apiuser)
         Session().commit()
 
     commit_changes = {"added": [], "common": [], "removed": []}
     if str2bool(Optional.extract(update_commits)):
         if PullRequestModel().has_valid_update_type(pull_request):
             update_response = PullRequestModel().update_commits(
                 pull_request)
             commit_changes = update_response.changes or commit_changes
         Session().commit()
 
     reviewers_changes = {"added": [], "removed": []}
     if reviewers:
         added_reviewers, removed_reviewers = \
             PullRequestModel().update_reviewers(pull_request, reviewers, apiuser)
 
         reviewers_changes['added'] = sorted(
             [get_user_or_error(n).username for n in added_reviewers])
         reviewers_changes['removed'] = sorted(
             [get_user_or_error(n).username for n in removed_reviewers])
         Session().commit()
 
     data = {
         'msg': 'Updated pull request `{}`'.format(
             pull_request.pull_request_id),
         'pull_request': pull_request.get_api_data(),
         'updated_commits': commit_changes,
         'updated_reviewers': reviewers_changes
     }
 
     return data
 
 
 @jsonrpc_method()
 def close_pull_request(
         request, apiuser, pullrequestid, repoid=Optional(None),
         userid=Optional(OAttr('apiuser')), message=Optional('')):
     """
     Close the pull request specified by `pullrequestid`.
 
     :param apiuser: This is filled automatically from the |authtoken|.
     :type apiuser: AuthUser
     :param repoid: Repository name or repository ID to which the pull
         request belongs.
     :type repoid: str or int
     :param pullrequestid: ID of the pull request to be closed.
     :type pullrequestid: int
     :param userid: Close the pull request as this user.
     :type userid: Optional(str or int)
     :param message: Optional message to close the Pull Request with. If not
         specified it will be generated automatically.
     :type message: Optional(str)
 
     Example output:
 
     .. code-block:: bash
 
         "id": <id_given_in_input>,
         "result": {
             "pull_request_id":  "<int>",
             "close_status":     "<str:status_lbl>,
             "closed":           "<bool>"
         },
         "error": null
 
     """
     _ = request.translate
 
     pull_request = get_pull_request_or_error(pullrequestid)
     if Optional.extract(repoid):
         repo = get_repo_or_error(repoid)
     else:
         repo = pull_request.target_repo
 
     if not isinstance(userid, Optional):
         if (has_superadmin_permission(apiuser) or
                 HasRepoPermissionAnyApi('repository.admin')(
                     user=apiuser, repo_name=repo.repo_name)):
             apiuser = get_user_or_error(userid)
         else:
             raise JSONRPCError('userid is not the same as your user')
 
     if pull_request.is_closed():
         raise JSONRPCError(
             'pull request `%s` is already closed' % (pullrequestid,))
 
     # only owner or admin or person with write permissions
     allowed_to_close = PullRequestModel().check_user_update(
             pull_request, apiuser, api=True)
 
     if not allowed_to_close:
         raise JSONRPCError(
             'pull request `%s` close failed, no permission to close.' % (
                 pullrequestid,))
 
     # message we're using to close the PR, else it's automatically generated
     message = Optional.extract(message)
 
     # finally close the PR, with proper message comment
     comment, status = PullRequestModel().close_pull_request_with_comment(
         pull_request, apiuser, repo, message=message)
     status_lbl = ChangesetStatus.get_status_lbl(status)
 
     Session().commit()
 
     data = {
         'pull_request_id': pull_request.pull_request_id,
         'close_status': status_lbl,
         'closed': True,
     }
     return data