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Nested Writable Django Rest Framework Serializer
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| # `CompanySerializer` contains `create()` and `update()` methods that can | |
| # create or update related Employees using the nested `EmployeeSerializer` | |
| class EmployeeSerializer(serializers.ModelSerializer): | |
| class Meta: | |
| model = Employee | |
| fields = ('id', 'name', 'email', 'company', 'created') | |
| class CompanySerializer(serializers.ModelSerializer): | |
| employees = EmployeeSerializer(many=True, required=False) | |
| class Meta: | |
| model = Company | |
| fields = ('id', 'title', 'employees', 'created') | |
| # Nested create | |
| def create(self, validated_data): | |
| employees_data = validated_data.pop('employees', None) | |
| company = Company.objects.create(**validated_data) | |
| if employees_data: | |
| for data in employees_data: | |
| Employee.objects.create(company=company, **data) | |
| return company | |
| # Nested update | |
| def update(self, instance, validated_data): | |
| employees_data = validated_data.pop('employees', None) | |
| instance.title = validated_data.get('title', instance.title) | |
| instance.save() | |
| if employees_data: | |
| employees = (instance.employees).all() | |
| employees = list(employees) | |
| for employee in instance.employees: | |
| for k, v in employees_data.items(): | |
| setattr(employee, k, v) | |
| employee.save() | |
| return instance |
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