Answer to myself, you can acces to the _meta API and get the Model's field
that you want
for field_name, field_instance in self.get_fields().items():
model_field = self.Meta.model._meta.get_field(field_name)
if model_field.many_to_many: ....
Le mardi 11 octobre 2016 20:23:32 UTC+2, matthieu...@gmail.com a écrit :
>
> Hi,
>
> I'm trying to create a recursive serializer because my app is front first
> and I store complete objects in indexeddb.
> So when I try to sync it's a pain to overwrite .create() and .update()
> method for every nested serializer
>
> A simple object for example (each serializer can have nested serializer
> too, until more than 5 levels) :
>
> class ClientfileSerializer(NestedStructureSerializer):
> building = BuildingSerializer()
> order_giver = ContactSerializer(required=False)
> # ForeignKey
> quote = QuoteSerializer(required=False)
> invoice = InvoiceSerializer(required=False, allow_null=True)
> # OneToOne related
> prestations = PrestationSerializer(required=False, many=True) #
> ManyToMany
> history_items = HistoryItemSerializer(required=False, many=True) #
> ForeignKey related
>
> class Meta:
> model = Clientfile
> fields = (
> 'number',
> 'token',
> 'order_giver',
>
> 'building',
> 'prestations',
> 'quote',
> 'invoice',
> 'history_items',
> )
>
>
> I have a lot of questions but the main is : *How to know the relationship
> of my nested serializer ?*
> Currently, I defined it in the serializer context but it's a bit dirty...
>
>
> class NestedStructureSerializer(serializers.ModelSerializer):
> def update(self, instance, validated_data):
> instance_changed = False
>
> for field_name, field_instance in self.get_fields().items():
>
> if not field_instance.read_only and field_name in validated_data:
>
> field_context = field_instance.context if
> hasattr(field_instance, 'context') else {}
> field_type = field_context['type'] if ('type' in
> field_context) else None
>
> if isinstance(field_instance, serializers.ListSerializer): #
> many=True result in ListSerializer
>
> if field_type == 'ManyToMany':
> # Process ManyTomany update
> else:
> # Process ForeignKey related update
>
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