Logical Fallacy
Logical Fallacy
Programming language:TypeScript
2021-04-08 11:36:33
0
Q:

rest api django return value if exists in another table

Charles
Charles
Code: TypeScript
2021-03-30 18:56:22 
class PostSerializer(serializers.ModelSerializer):
    replied = serializers.SerializerMethodField('has_replies')

    def has_replies(post):
        return post.replies.filter(owner=self.context["request"].user).exists()

    class Meta:
        fields = ('id', 'name', 'replied')
0
h3xi4oy1
h3xi4oy1
Code: TypeScript
2021-09-22 15:25:36 
class PostList(generics.ListAPIView):
    ...
    def get_queryset(self):
        Post.objects.all().extra(select={
        'current_user_replies_count': 'SELECT COUNT(*) FROM <reply table> WHERE' +
        'post_id=posts_post.id AND owner_id = %s'
                                  },select_params=(request.user.id,))
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