Attribute Error after adding many=True in restframework django?

Question

class CommentSerializer(serializers.ModelSerializer):


    class Meta:

        model = Comment
        fields=('Comment','Comment_text','Comment_time','Comment_Post','Comment_User', )

class PostSerializers(serializers.ModelSerializer):
    comment = CommentSerializer(many=True)

    class Meta:
    model = Postovo
    fields = ('Postovo_id','Postovo_trending','comment', )

Models are like this

class Postovo(models.Model):

Postovo_id = models.AutoField(primary_key=True)
Postovo_type = models.ForeignKey(Type, related_name='posttype' ,default='1', editable=True)
Postovo_time = models.CharField(max_length=100,default=currentTimestamp, editable=True)
Postovo_link1 = models.CharField(max_length=1000,default='linkofimage1', editable=True)
Postovo_link2 = models.CharField(max_length=1000,default='linkofimage2', editable=True)
Postovo_person1=models.CharField(max_length=100,default='person1', editable=True)
Postovo_person2=models.CharField(max_length=100,default='person2', editable=True)
Postovo_hot=models.CharField(max_length=100,default='False', editable=True)
Postovo_trending=models.CharField(max_length=100,default='False', editable=True)


def __str__(self):
    return '%s' % (self.Postovo_id)

class Comment(models.Model):

Comment = models.AutoField(primary_key=True)
Comment_text = models.CharField(max_length=100)
Comment_time = models.CharField(max_length=100,default=currentTimestamp)
Comment_Post = models.ForeignKey(Postovo, related_name='commentpost' ,default='1', editable=True)
Comment_User = models.ForeignKey(RegUser, related_name='commentuser' ,default='1', editable=True)
def __str__(self):
    return '%s' % (self.Comment)

In views

class Postcomment(viewsets.ModelViewSet):

queryset = Postovo.objects.all()
serializer_class = PostSerializers

ERROR

AttributeError: Got AttributeError when attempting to get a value for field comment on serializer PostSerializers. The serializer field might be named incorrectly and not match any attribute or key on the Postovo instance. Original exception text was: 'Postovo' object has no attribute 'comment'.

Rahul Gupta · Accepted Answer · 2016-03-29 09:25:34Z

3

You need to use the related name commentpost instead of comment in PostSerializers.

class PostSerializers(serializers.ModelSerializer):
    commentpost = CommentSerializer(many=True)

    class Meta:
    model = Postovo
    fields = ('Postovo_id','Postovo_trending','commentpost', )

The error is coming because there is no comment attribute on a Postovo instance. The manager for getting all the related Comment instances is accessible using the related_name commentpost.

edited Mar 29, 2016 at 9:25

answered Mar 29, 2016 at 9:20

Rahul Gupta

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1 Comment

jayant singh Over a year ago

It worked :) @rahul thank you very much actually this silly thing is not mentioned anywhere .

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