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Django Rest Framework ModelSerializer pk field not existing on update


Django Rest Framework ModelSerializer pk field not existing on update

By : Marcio Sales
Date : November 20 2020, 11:01 PM
Hope this helps You don't want to update the pk anyway. By default, it's read-only so you won't have it for write operations. If you really require it, mark it as read-write.
code :


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Django Rest Framework - How to add custom field in ModelSerializer

Django Rest Framework - How to add custom field in ModelSerializer


By : 羅濟威
Date : March 29 2020, 07:55 AM
To fix this issue You're doing the right thing, except that CharField (and the other typed fields) are for writable fields.
In this case you just want a simple read-only field, so instead just use:
code :
customField = Field(source='get_absolute_url')
Django REST Framework: adding additional field to ModelSerializer

Django REST Framework: adding additional field to ModelSerializer


By : bluestyle
Date : March 29 2020, 07:55 AM
To fix this issue I want to serialize a model, but want to include an additional field that requires doing some database lookups on the model instance to be serialized: , I think SerializerMethodField is what you're looking for:
code :
class FooSerializer(serializers.ModelSerializer):
  my_field = serializers.SerializerMethodField('is_named_bar')

  def is_named_bar(self, foo):
      return foo.name == "bar" 

  class Meta:
    model = Foo
    fields = ('id', 'name', 'my_field')
How to pass a variable from ModelSerializer.update() to ModelViewSet.update() in Django REST Framework

How to pass a variable from ModelSerializer.update() to ModelViewSet.update() in Django REST Framework


By : Inaban
Date : March 29 2020, 07:55 AM
Any of those help I need to pass a return value of a custom model update method in the view response.
code :
class Serializer(ModelSerializer):
   important_info = None

   def update(self, instance, validated_data):
      something_special = validated_data.pop('something_special')

      self.important_info = model.update_something_special(something_special)

      for attr, value in validated_data.items():
          setattr(instance, attr, value)
      instance.save()

      return instance



class View(ModelViewSet):
    def update(self, request, *args, **kwargs):
        partial = kwargs.pop('partial', False)
        instance = self.get_object()
        serializer = self.get_serializer(instance, data=request.data, partial=partial)
        serializer.is_valid(raise_exception=True)
        self.perform_update(serializer)
        important_info = serializer.important_info 
        return Response(serializer.data)
How to use field.set() in create function for Django REST Framework ModelSerializer?

How to use field.set() in create function for Django REST Framework ModelSerializer?


By : Dhananjay.Ankushrao
Date : March 29 2020, 07:55 AM
To fix this issue The problem is when you creating market instance you pass region and language object to create() method. You should pass it to set() instead:
code :
def create(self, validated_data):
    # create market data for Market model.
    market_data = validated_data.pop('market')
    regions = market_data.pop("regions")
    languages = market_data.pop("languages")
    market = Market.objects.create(**market_data)
    market.regions.set(regions)
    market.languages.set(languages)
How to override model field validation in django rest framework ModelSerializer

How to override model field validation in django rest framework ModelSerializer


By : Slim025
Date : March 29 2020, 07:55 AM
hop of those help? remove unique constraint on mobile number of table,so django serializer will validate according to that .
or alternatively,
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