marazmiki / django-generic-helpers Goto Github PK

Hello!

I use this package in my project for comments model:

from generic_helpers.models import GenericRelationModel

class Comment(GenericRelationModel):

    user = models.ForeignKey(User)
    text = models.TextField()

And now I want to create data migration:

def user_read_posts(apps, schema_editor):
    User = apps.get_model("main", "User")
    Post = apps.get_model("main", "Post")
    Comment = apps.get_model("comments", "Comment")

    comments = Comment.objects.all()
    for comment in comments:
        print (comment.content_object.__class__.__name__)
        if isinstance(comment.content_object, Post):
            comment.user.read_posts.add(comment.content_object)

class Migration(migrations.Migration):

    dependencies = [
        ('main', '0039_auto_20160314_0906'),
    ]

    operations = [
        migrations.RunPython(user_read_posts),
    ]

But when I run it, django raises error: AttributeError: 'Comment' object has no attribute 'content_object'.

When I call content_object in shell or views, it works perfectly.

What should I do??

Must return a model.content_object.get_absolute_url()

This feature is exactly what I've been looking for, but there's a problem.

From README:

Features the application provides:

• Creating an arbitrary number of generic relation fields, both required and optional;
• Providing custom names for content_type and object_id columns
• You can define a whitelist (or a black one) of models that could (not) be written into the field

That sounds great, but is there any documentation explaining how to use those features? The example in the README doesn't include any arguments.

[20:42:03] xxx: напомни еще про generic relations helper
[20:42:28] xxx: там не поддерживается фокус типа post.comments_set.all() ?
[20:42:51] xxx: (для получения Comment привязанных через GR к Post)
[20:44:00] yyy: м
[20:44:09] yyy: я специально не делал. Но идея хороша
[20:44:17] yyy: пожалуй, надо будет попробовать замутиться

According to this, if a model has a customized save() method, it would be overridden by GenericRelationField while contributing to class.