boards/migrations/0020_image_hashes.py

# -*- coding: utf-8 -*-
import hashlib

from south.utils import datetime_utils as datetime
from south.db import db
from south.v2 import DataMigration
from django.db import models

class Migration(DataMigration):

    def forwards(self, orm):
        # Note: Don't use "from appname.models import ModelName". 
        # Use orm.ModelName to refer to models in this application,
        # and orm['appname.ModelName'] for models in other applications.
        for post in orm.Post.objects.filter(image_width__gt=0):
            md5 = hashlib.md5()
            for chunk in post.image.chunks():
                md5.update(chunk)
            image_hash = md5.hexdigest()
            post.image_hash = image_hash
            post.save()

    def backwards(self, orm):
        "Write your backwards methods here."

    models = {
        'boards.ban': {
            'Meta': {'object_name': 'Ban'},
            'can_read': ('django.db.models.fields.BooleanField', [], {'default': 'True'}),
            u'id': ('django.db.models.fields.AutoField', [], {'primary_key': 'True'}),
            'ip': ('django.db.models.fields.GenericIPAddressField', [], {'max_length': '39'}),
            'reason': ('django.db.models.fields.CharField', [], {'default': "'Auto'", 'max_length': '200'})
        },
        'boards.post': {
            'Meta': {'object_name': 'Post'},
            '_text_rendered': ('django.db.models.fields.TextField', [], {}),
            u'id': ('django.db.models.fields.AutoField', [], {'primary_key': 'True'}),
            'image': ('boards.thumbs.ImageWithThumbsField', [], {'max_length': '100', 'blank': 'True'}),
            'image_hash': ('django.db.models.fields.CharField', [], {'max_length': '36'}),
            'image_height': ('django.db.models.fields.IntegerField', [], {'default': '0'}),
            'image_pre_height': ('django.db.models.fields.IntegerField', [], {'default': '0'}),
            'image_pre_width': ('django.db.models.fields.IntegerField', [], {'default': '0'}),
            'image_width': ('django.db.models.fields.IntegerField', [], {'default': '0'}),
            'last_edit_time': ('django.db.models.fields.DateTimeField', [], {}),
            'poster_ip': ('django.db.models.fields.GenericIPAddressField', [], {'max_length': '39'}),
            'poster_user_agent': ('django.db.models.fields.TextField', [], {}),
            'pub_time': ('django.db.models.fields.DateTimeField', [], {}),
            'referenced_posts': ('django.db.models.fields.related.ManyToManyField', [], {'blank': 'True', 'related_name': "'rfp+'", 'null': 'True', 'symmetrical': 'False', 'to': "orm['boards.Post']"}),
            'text': ('markupfield.fields.MarkupField', [], {'rendered_field': 'True'}),
            'text_markup_type': ('django.db.models.fields.CharField', [], {'default': "'markdown'", 'max_length': '30'}),
            'thread': ('django.db.models.fields.related.ForeignKey', [], {'default': 'None', 'to': "orm['boards.Post']", 'null': 'True'}),
            'thread_new': ('django.db.models.fields.related.ForeignKey', [], {'default': 'None', 'to': "orm['boards.Thread']", 'null': 'True'}),
            'title': ('django.db.models.fields.CharField', [], {'max_length': '50'}),
            'user': ('django.db.models.fields.related.ForeignKey', [], {'default': 'None', 'to': "orm['boards.User']", 'null': 'True'})
        },
        'boards.setting': {
            'Meta': {'object_name': 'Setting'},
            u'id': ('django.db.models.fields.AutoField', [], {'primary_key': 'True'}),
            'name': ('django.db.models.fields.CharField', [], {'max_length': '50'}),
            'user': ('django.db.models.fields.related.ForeignKey', [], {'to': "orm['boards.User']"}),
            'value': ('django.db.models.fields.CharField', [], {'max_length': '50'})
        },
        'boards.tag': {
            'Meta': {'object_name': 'Tag'},
            u'id': ('django.db.models.fields.AutoField', [], {'primary_key': 'True'}),
            'linked': ('django.db.models.fields.related.ForeignKey', [], {'to': "orm['boards.Tag']", 'null': 'True', 'blank': 'True'}),
            'name': ('django.db.models.fields.CharField', [], {'max_length': '100'}),
            'threads': ('django.db.models.fields.related.ManyToManyField', [], {'blank': 'True', 'related_name': "'tag+'", 'null': 'True', 'symmetrical': 'False', 'to': "orm['boards.Thread']"})
        },
        'boards.thread': {
            'Meta': {'object_name': 'Thread'},
            'archived': ('django.db.models.fields.BooleanField', [], {'default': 'False'}),
            'bump_time': ('django.db.models.fields.DateTimeField', [], {}),
            u'id': ('django.db.models.fields.AutoField', [], {'primary_key': 'True'}),
            'last_edit_time': ('django.db.models.fields.DateTimeField', [], {}),
            'replies': ('django.db.models.fields.related.ManyToManyField', [], {'blank': 'True', 'related_name': "'tre+'", 'null': 'True', 'symmetrical': 'False', 'to': "orm['boards.Post']"}),
            'tags': ('django.db.models.fields.related.ManyToManyField', [], {'to': "orm['boards.Tag']", 'symmetrical': 'False'})
        },
        'boards.user': {
            'Meta': {'object_name': 'User'},
            'fav_tags': ('django.db.models.fields.related.ManyToManyField', [], {'symmetrical': 'False', 'to': "orm['boards.Tag']", 'null': 'True', 'blank': 'True'}),
            'fav_threads': ('django.db.models.fields.related.ManyToManyField', [], {'blank': 'True', 'related_name': "'+'", 'null': 'True', 'symmetrical': 'False', 'to': "orm['boards.Post']"}),
            u'id': ('django.db.models.fields.AutoField', [], {'primary_key': 'True'}),
            'rank': ('django.db.models.fields.IntegerField', [], {}),
            'registration_time': ('django.db.models.fields.DateTimeField', [], {}),
            'user_id': ('django.db.models.fields.CharField', [], {'max_length': '50'})
        }
    }

    complete_apps = ['boards']
    symmetrical = True