Conditionally changing the field of the serializer based on the request

[Ege Öğretmen]

Hello,

I was trying to find a way to change the serializer field conditionally based on the request. When the request is GET, then I would like to have a nested serializer, otherwise I'm not interested in the details of the object and rather use the list of pk s to process the data. Is this approach advisable? Is there a best practice or do I have to change my mindset altogether?

Below is my approach so far:

class FooSerializer(ModelSerializer):
    bar = SerializerMethodField('get_bar')
   
    def get_bar(self, obj):
        req = self.context['request']
        if(req.method == 'GET'):
            bar = BarSerializer(many=True) # shouldn't I pass the data related to 'Bar' here?
        else:
            bar = PrimaryKeyRelatedField(many=True, queryset=Bar.objects.filter(foo=obj)) # is this correct?

    # insert class Meta here...

Thanks in advance,
Ege

[Ege Öğretmen]

forgot to return bar at the end of the method... the question is still valid though