CODEWITHSUNDEEP
python-3.xdjangodjango-rest-framework
Muslimbek Abduganiev
Muslimbek Abduganiev

Reputation: 941

django-restframework. How to change many to many field name in the serializer?

I know it is relatively simple to change a represented filed name in the serializer with source argument like this:

class SomeSerializer(ModelSerializer):
    alternate_name = serializers.SomeField(source='field_name')

    class Meta:
        fields = ('alternate_name')

But when dealing with a many to many field, the source is a ManyRelatedManager and using source in it leads to errors:

class SomeModel(models.Model):
    field_name = models.ManyToManyField(OtherModel, related_name='groups')

class SomeModelSerializer(ModelSerializer):
    alternate_name = models.ListField(source='field_name')

    class Meta:
        fields = ('alternate_name')

This gives ManyRelatedManager object is not iterable! Using other Fields instead of ListField gives other errors. What is the right approach here?

Upvotes: 0

Views: 275

Answers (1)

Jeet Patel
Jeet Patel

Reputation: 1241

You can use obj.field_name.filter() to get the related data and return this from SerializerMethodField() as stated above.

This is how I would do it not sure if it works for you.

class SomeModel(models.Model):

        field_name = models.ManyToManyField(OtherModel, related_name='groups')

class SomeModelSerializer(ModelSerializer):

    #name this field whatever you want
    some_name = serializers.SerializerMethodField()

    # SerializerMethodField gets populated from "get_{filed_name}" method
    def get_some_name(self, obj):

        #this will return a list
        return obj.field_name.filter()

    
    class Meta:
        fields = ('some_name')

Upvotes: 1

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