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pybb/migrations/002_post_count.py

 

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from django.db import connection

 

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from pybb.models import Forum, Topic

 

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DESCRIPTION = 'Add and populate post_count fields to Forum and Topic models'

 

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def migrate():

 

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    cur = connection.cursor()

 

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    print 'Altering forum table'

 

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    cur.execute("ALTER TABLE pybb_forum ADD post_count INT NOT NULL DEFAULT 0")

 

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    print 'Altering topic table'

 

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    cur.execute("ALTER TABLE pybb_topic ADD post_count INT NOT NULL DEFAULT 0")

 

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    print 'Populating post_count of topics'

 

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    for topic in Topic.objects.all():

 

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        topic.post_count = topic.posts.all().count()

 

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        topic.save()

 

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    print 'Populating post_count of forums'

 

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    for forum in Forum.objects.all():

 

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        forum.post_count = sum(x.post_count for x in forum.topics.all())

 

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        forum.save()

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