How to condition serializer? DjangoRestFramework

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How to condition serializer? DjangoRestFramework

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#1 by (2 votes)

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I have the following serializer:

class PerfilSerializer(serializers.ModelSerializer):
    usuario = UserSerializer()
    seguidores = serializers.PrimaryKeyRelatedField(many=True, read_only=True)
    looks = LookSerializer(many=True, read_only=True)
    colecciones = ColeccionSerializer(many=True, read_only=True)

    class Meta:
        model = Perfil
        fields = ['id','usuario','boutique','tel','tel_fijo','entrg_pais','entrg_dep',
            'entrg_ciudad','entrg_direccion','entrg_cp','rmt_pais','rmt_dep',
            'rmt_direccion','rmt_ciudad','rmt_cp','num_cc','avatar','descp_armario',
            'tipo_ident','cedula_o_nit','propietario_cc','banco','tipo_cc','follow','seguidores',
            'notificacion_follow','colecciones']

The variables looks and collections are relationships with two other serializers.

The issue is that I want to show one of the two depending on whether the variable boutique is True or False . In case of True show colecciones and in case of False , show looks .

python python-3.x django djangorestframework

asked by F Delgado 16.05.2018 в 16:18

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1 answer

Difference of time elapsed between two hours Why does my program fail just before it ends?

score 2 · Accepted Answer

For what you need, you can use the to_representation method offered by the API in the following way:

class PerfilSerializer(serializers.ModelSerializer):
    usuario = UserSerializer()
    seguidores = serializers.PrimaryKeyRelatedField(many=True, read_only=True)
    looks = LookSerializer(many=True, read_only=True)
    colecciones = ColeccionSerializer(many=True, read_only=True)

    class Meta:
        model = Perfil
        fields = ['id','usuario','boutique','tel','tel_fijo','entrg_pais','entrg_dep',
        'entrg_ciudad','entrg_direccion','entrg_cp','rmt_pais','rmt_dep',
        'rmt_direccion','rmt_ciudad','rmt_cp','num_cc','avatar','descp_armario',
        'tipo_ident','cedula_o_nit','propietario_cc','banco','tipo_cc','follow','seguidores',
        'notificacion_follow', 'colecciones', 'looks']

    def to_representation(self, obj):  # obj es la instancia del objeto
       data = super(PerfilSerializer, self).to_representation(obj)
       if obj.boutique:
           data.pop('looks', None)
       else:
           data.pop('colecciones', None)
       return data