Base64ImageField returns full url path only when parameter context={"request": request} added to it - Is there any other way

Question

I currently have a Base64ImageField which works totally fine. The only problem I am having is sometimes it returns back an incomplete path. It skips the domain name but the rest of the path is fine.The reason its skipping the domain name is because I do not pass in the parameter context={"request": request} during serialization.The reason for that is because sometimes I do not have access to the request object.In other words this works fine

jsonObject = Serializer(model_instance,context={"request": request}).data

and this one skips the domain name from the image field

jsonObject = Serializer(model_instance).data

My question is how can I make it return the full url path using the second example when I do not have to the request object ? Or is there any way for me to obtain the request object. When its not available ?

I have this serializer in my code

class Serializer_Employer_TX(ModelSerializer): user = Serializer_User() employer_image = Base64ImageField(max_length=None, use_url=True, required=False) class Meta: model = modelEmployer fields = [ 'user', 'employer_zip', 'employer_image', ]

Youssef BH · Accepted Answer · 2018-07-08 21:26:20Z

You can use sites framework, and override to_representation method of Serializer_Employer_TX

from django.contrib.sites.models import Site class Serializer_Employer_TX(ModelSerializer): user = Serializer_User() employer_image = Base64ImageField(max_length=None, use_url=True, required=False) class Meta: model = modelEmployer fields = [ 'user', 'employer_zip', 'employer_image', ] def to_representation(self, instance): """Convert `username` to lowercase.""" ret = super().to_representation(instance) if not 'request' in self.context: # You can tweaks the url in here directly current_site = Site.objects.get_current().domain ret['employer_image'] = current_site + ret['employer_image'] return ret

I hope this will help.

This sounds promising could you tell me what to_representation does ? and when its called ?
@Rajeshwar to_representation() - provided by BaseSerializer and ModelSerializer. Override this to support serialization, for read operations. more implementation details here.

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