Serializers not displaying foreign key data - django

Question

My serializers are not showing related Models. I mean the models that have got many-to-one relationship. Please see the code below. Forgive my English.
Completely confusing me please help. I am new to django. I am trying to save my Draft js ContentState to the database. I have made the Post model a Foreignkey to my Block models. But When I try to retrieve the data using django-rest-framework serializers the blocks are not displaying.
Same applies with the Blocks I tried to serialize them on their own but the inlineStyleRanges and entityRanges data is not coming up.
#models.py
class Post(models.Model):
created_by= models.ForeignKey(User, on_delete=models.CASCADE)
cat= models.ForeignKey(Category, on_delete=models.CASCADE)
class Block(models.Model):
post = models.ForeignKey(Post, on_delete=models.CASCADE)
key = models.CharField(max_length=255)
text = models.TextField()
type = models.CharField(max_length=90)
depth = models.IntegerField(default=0)
class InlineStyleRange(models.Model):
block = models.ForeignKey(Block, on_delete=models.CASCADE)
offset = models.IntegerField()
length = models.IntegerField()
style = models.CharField(max_length=90)
class EntityRange(models.Model):
block = models.ForeignKey(Block, on_delete=models.CASCADE)
offset = models.IntegerField()
length = models.IntegerField()
key = models.IntegerField()
class Data(models.Model):
data = models.TextField()
class EntityRangeData(Data):
enityrange = models.ForeignKey(EntityRange, on_delete=models.CASCADE)
#Entity map here we go
class EntityEntry(models.Model):
key = models.IntegerField()
block= models.ForeignKey(Block, on_delete=models.CASCADE)
type = models.CharField(max_length=90)
mutability = models.CharField(max_length=90)
class EntityEntryData(Data):
entityentry = models.ForeignKey(EntityEntry, on_delete=models.CASCADE)
```#Serializers.py```
class EntityEntryDataSerializer(serializers.ModelSerializer):
class Meta:
model = models.EntityEntryData
fields = "__all__"
class EntityEntrySerializer(serializers.ModelSerializer):
data = EntityEntryDataSerializer()
class Meta:
model = models.EntityEntry
fields = "__all__"
class EntityRangeDataSerializer(serializers.ModelSerializer):
class Meta:
model = models.EntityRangeData
fields = "__all__"
class EntityRangeSerializer(serializers.ModelSerializer):
data = EntityRangeDataSerializer()
class Meta:
model = models.EntityRange
fields = "__all__"
class InlineStyleRangeSerializer(serializers.ModelSerializer):
class Meta:
model = models.InlineStyleRange
fields = "__all__"
class BlockSerializer(serializers.ModelSerializer):
inlineStyleRanges = InlineStyleRangeSerializer(many=True, required=False)
entityRanges = EntityRangeSerializer(many=True, required=False)
class Meta:
model = models.Block
fields = "__all__"
class PostSerializer(serializers.ModelSerializer):
blocks = BlockSerializer(many=True, required=False, read_only=True)
class Meta:
model = models.Post
fields = "__all__"
The output be like
[
{
"id": 1,
"created_by": 1,
"cat": 2
}
]

Answer 1

The Block model does not have attributes called inlineStyleRanges or entityRanges, so you should either use related_name in the ForeignKey field or you could specify a source argument in the serializer.
inlineStyleRanges = InlineStyleRangeSerializer(many=True, required=False, source='inlinestyle_set')
entityRanges = EntityRangeSerializer(many=True, required=False, source='entityrange_set')
You might have to include both nested serializers in BlockSerializer.Meta.fields as well. Instead of "__all__", use a list:
fields = ['id', 'post', 'key', 'inlineStyleRanges', 'entityRanges']