Serialization of parent model including child models
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I have models - Commodity, Clother and child models, as Acessories, Outwear, etc.:
class Commodity(models.Model): atribute = models.CharField() class Clother(models.Model): commodity = models.ForeignKey(Commodity) clother_atribute = models.CharField() class Acessories(models.Model): clother = models.ForeignKey(Clother) acessories_atribute = models.CharField() class Outwear(models.Model): clother = models.ForeignKey(Clother) outwear_atribute = models.CharField()
How can I serialize parent model Commodity to call all vertical dependencies. I suppose to query Commodity id and get all Clother attributes and Acessories or Outwear attributes. Thanks!
If I understood your problem you can define
ClotherSerializer. You can use
depth = 1 to serialize nested objects in this serializer:
class ClotherSerializer(serializers.ModelSerializer): class Meta: model = Clother fields = ('id', 'acessories_set', 'outwear_set') depth = 1
Later in your
CommoditySerializer you can use
ClotherSerializer to serialize clother and all it's relation:
class CommoditySerializer(serializers.ModelSerializer): clother_set = ClotherSerializer(many=True) class Meta: model = Commodity fields = ('id', 'clother_set')
django - Serialization of parent model including child models, ForeignKey(Clother) outwear_atribute = models.CharField(). How can I serialize parent model Commodity to call all vertical dependencies. Parent involvement in education: models, strategies and contexts Shawn Moore, Sue Lasky In this paper, we explore the conceptual, empirical and strategic literature related to parent involvement in education. Parent involvement in schooling has traditionally taken many forms including parents helping their children with
You can use the
drf-writable-nested [GitHub] package for that and specify in a serializer how to serialize certain fields. By using another serializer, you thus specify that it it serialized by calling the serializer for these children:
class CommoditySerializer(WritableNestedModelSerializer): clother_set = ClotherSerializer(many=True) class Meta: model = Commodity fields = ("atribute", 'clother_set') class ClotherSerializer(WritableNestedModelSerializer): class Meta: model = Clother fields = ("clother_atribute",)
Of course you can add more such relations, for example to specify
Acessories for a
I advice you look at the GitHub page, and use this as a template for your own serializer.
Nested Relationships, DRF Toolbox's default model serializer will display included nested relationships as dictionaries, with the parent or child model shown in its entirety with default Piaget's Theory For Parents. This is a critical area for the development of trust and faith in what others tell the child. Serialization is the ability to organize things by progression, such
Alternatively, this can also be achieved using
class ClotherSerializer(serializers.ModelSerializer): """ Serializer for Clother data model. """ acessories = serializers.SerializerMethodField() outwears = serializers.SerializerMethodField() class Meta: model = Clother fields = ('id', 'acessories', 'outwears') def get_acessories(self, clother): return AcessoriesSerializer(clother.acessories_set.all(), many=True).data def get_outwears(self, clother): return OutwearSerializer(clother.outwear_set.all(), many=True).data class CommoditySerializer(serializers.ModelSerializer): """ Serializer for Commodity data model. """ clother = serializers.SerializerMethodField() class Meta: model = Commodity fields = ('id', 'clother') def get_clother(self, commodity): return ClotherSerializer(commodity.clother_set.all(), many=True).data
Inherited serializer cannot serialize fields from parent model? · Issue , TextField(blank=True, null=True) class Child(Parent): filed1 = models. ModelSerializer): class Meta: model = Parent fields = ('id', 'name', 'description',) class So I try to debug where the problem with pdb. When I traced to The Childhood Bereavement Estimation Model (CBEM) is a statistical tool developed by Judi's House/JAG Institute that uses population metrics to approximate rates of U.S. children and youth who will experience the death of a parent and/or sibling by the time they reach adulthood.
Object Serialization with Inheritance in Java, More restrictive access to a derived class method in Java · Parent and Child classes having There are some cases of Serialization with respect to inheritance :. Specifically, the first three model stages (Connect, Attend, and Participate) are known to be predicted by a set of factors including family characteristics (e.g. parent’s age, socioeconomic status, economic stress, family structure), child characteristics (e.g. age and gender, difficulties profile), family processes (e.g. parental mental
Django Serialize ForeignKeyField, ManyToManyField, Instance and , Django's serialization framework provides a mechanism for from django.db import models class User(models.Model): name = models. The QIC-ChildRep Research and Demonstration Projects will implement the model of child representation articulated here. Our articulation of the QIC Best Practice Model of Child Representation is largely based on the 1996 ABA Standards of Practice for Lawyers Who Represent Children in Abuse and Neglect Cases (1996 ABA Standards).
Serializers - Django REST framework, Serializers allow complex data such as querysets and model instances to be converted to shortcut for creating serializers that deal with model instances and querysets. Other models fields will be mapped to a corresponding serializer field. Parent involvement in young children’s education has many aspects. Parents are considered to be the most important primary role models in their young children’s immediate surroundings.
- Do you use the Django serializers?
- I use Django REST Framework model serializers.
- Well since there is no concept in Django like "vertical dependencies", you probably have to list those yourself. Yes, you can walk through the model-relation graph, but detecting cycles make things complicated.
- Thanks, well noted. Hoped to meet something like this.
- @D.Make You are welcome. You can try to use depth=2 in commodityserializer directly. But I afraid it will not work for reverse relation.