artifacts: show attached artifacts in advanced page, and delete them on repo deletion

rhodecode/model/db.py

@@ -1678,11 +1678,12 b' class Repository(Base, BaseModel):'
         cascade="all, delete, delete-orphan")
     ui = relationship('RepoRhodeCodeUi', cascade="all")
     settings = relationship('RepoRhodeCodeSetting', cascade="all")
-    integrations = relationship('Integration',
-                                cascade="all, delete, delete-orphan")
+    integrations = relationship('Integration', cascade="all, delete, delete-orphan")
 
     scoped_tokens = relationship('UserApiKeys', cascade="all")
 
+    artifacts = relationship('FileStore', cascade="all")
+
     def __unicode__(self):
         return u"<%s('%s:%s')>" % (self.__class__.__name__, self.repo_id,
                                    safe_unicode(self.repo_name))

rhodecode/templates/admin/repos/repo_edit_advanced.mako

@@ -11,6 +11,7 b''
     (_('Attached scoped tokens'), len(c.rhodecode_db_repo.scoped_tokens), '', [x.user for x in c.rhodecode_db_repo.scoped_tokens]),
     (_('Pull requests source'), len(c.rhodecode_db_repo.pull_requests_source), '', ['pr_id:{}, repo:{}'.format(x.pull_request_id,x.source_repo.repo_name) for x in c.rhodecode_db_repo.pull_requests_source]),
     (_('Pull requests target'), len(c.rhodecode_db_repo.pull_requests_target), '', ['pr_id:{}, repo:{}'.format(x.pull_request_id,x.target_repo.repo_name) for x in c.rhodecode_db_repo.pull_requests_target]),
+    (_('Attached Artifacts'), len(c.rhodecode_db_repo.artifacts), '', ''),
  ]
 %>