mytag = Tag.objects.get(id=1)
mytag.blog_set.all()
Em domingo, 8 de fevereiro de 2015 14:30:25 UTC-2, Dean De Leo escreveu:
>
> Hello,
> I am trying to find how to filter the entries of my blog by a set of
> tags, using the Django models.
> In particular there are two relations:
> Blog (id, title, content)
> Tag ( name, blog_id )
> with Tag.blog_id foreign key of Blog.id
> I want to select all blog entries that contain a certain set of tags.
> For instance, I would express the query in SQL as:
> SELECT * FROM blog_blog b WHERE EXISTS ( SELECT 1 FROM blog_tag t WHERE
> t.blog_id = b.id AND lower(t.name) IN ('tag1', 'tag2', 'tag3') );
>
> How to represent the same query with the Django QuerySets ?
>
> Thanks,
> Dean De Leo
>
>
>
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