Mixing
(How) Can I declare how a field type is to be de-/serialized by Django REST framework?
I'm using a custom field type in a Django project that is based on django.db.models.IntegerField and this type is used for various fields in a model. It is used to store the data as integer in a database while it has a more complex related Python type and string representation. It also implements the methods value_to_string and to_python that are respected when using ./manage.py dumpdata for example.
I also exposed a REST API with DRF where a very generic serializer based on rest_framework.serializers.HyperlinkedModelSerializer with fields configured as __all__ in its Meta object is employed.
When accessing that API a TypeError is thrown in rest_framework.fields.IntegerField.to_representation when it tries to mangle the aforementioned Python type through int.
Now, given that there are de-/serialization routines implemented for that type in question, it's easy to implement a field type (in the DRF meaning, as replacement for the previously mentioned class). But how would I setup a mapping between this field type and the Django ORM's one only once without declaring the (DRF) field type for each affected field? I can't find any hint on that in the serializer fields docs nor in the rest_framework.fields module.
django-rest-framework
asked Nov 20 '18 at 17:37
funky-futurefunky-future
1,31311529
add a comment |
I'm using a custom field type in a Django project that is based on django.db.models.IntegerField and this type is used for various fields in a model. It is used to store the data as integer in a database while it has a more complex related Python type and string representation. It also implements the methods value_to_string and to_python that are respected when using ./manage.py dumpdata for example.
I also exposed a REST API with DRF where a very generic serializer based on rest_framework.serializers.HyperlinkedModelSerializer with fields configured as __all__ in its Meta object is employed.
When accessing that API a TypeError is thrown in rest_framework.fields.IntegerField.to_representation when it tries to mangle the aforementioned Python type through int.
Now, given that there are de-/serialization routines implemented for that type in question, it's easy to implement a field type (in the DRF meaning, as replacement for the previously mentioned class). But how would I setup a mapping between this field type and the Django ORM's one only once without declaring the (DRF) field type for each affected field? I can't find any hint on that in the serializer fields docs nor in the rest_framework.fields module.
django-rest-framework
asked Nov 20 '18 at 17:37
funky-futurefunky-future
1,31311529
add a comment |
I'm using a custom field type in a Django project that is based on django.db.models.IntegerField and this type is used for various fields in a model. It is used to store the data as integer in a database while it has a more complex related Python type and string representation. It also implements the methods value_to_string and to_python that are respected when using ./manage.py dumpdata for example.
I also exposed a REST API with DRF where a very generic serializer based on rest_framework.serializers.HyperlinkedModelSerializer with fields configured as __all__ in its Meta object is employed.
When accessing that API a TypeError is thrown in rest_framework.fields.IntegerField.to_representation when it tries to mangle the aforementioned Python type through int.
Now, given that there are de-/serialization routines implemented for that type in question, it's easy to implement a field type (in the DRF meaning, as replacement for the previously mentioned class). But how would I setup a mapping between this field type and the Django ORM's one only once without declaring the (DRF) field type for each affected field? I can't find any hint on that in the serializer fields docs nor in the rest_framework.fields module.
django-rest-framework
asked Nov 20 '18 at 17:37
funky-futurefunky-future
1,31311529
I'm using a custom field type in a Django project that is based on django.db.models.IntegerField and this type is used for various fields in a model. It is used to store the data as integer in a database while it has a more complex related Python type and string representation. It also implements the methods value_to_string and to_python that are respected when using ./manage.py dumpdata for example.
I also exposed a REST API with DRF where a very generic serializer based on rest_framework.serializers.HyperlinkedModelSerializer with fields configured as __all__ in its Meta object is employed.
When accessing that API a TypeError is thrown in rest_framework.fields.IntegerField.to_representation when it tries to mangle the aforementioned Python type through int.
Now, given that there are de-/serialization routines implemented for that type in question, it's easy to implement a field type (in the DRF meaning, as replacement for the previously mentioned class). But how would I setup a mapping between this field type and the Django ORM's one only once without declaring the (DRF) field type for each affected field? I can't find any hint on that in the serializer fields docs nor in the rest_framework.fields module.
django-rest-framework
django-rest-framework
asked Nov 20 '18 at 17:37
funky-futurefunky-future
1,31311529
asked Nov 20 '18 at 17:37
funky-futurefunky-future
1,31311529
asked Nov 20 '18 at 17:37
funky-futurefunky-future
1,31311529
asked Nov 20 '18 at 17:37
funky-futurefunky-future
1,31311529
asked Nov 20 '18 at 17:37
funky-futurefunky-future
1,31311529
1,31311529
add a comment |
add a comment |
1 Answer
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You need to create a custom serializer field that corresponds to your model field, and then add that to the mapping that DRF uses for ModelSerializers.
This is how DRF adds the django.contrib.postgres.fields.* mappings as well.
- Creating Custom Serializer Fields
- DRF adding the postgres fields
Something like this:
class MyField(models.IntegerField):
pass
class MyDrfField(Field):
def to_internal_value(...)
def to_representation(...)
ModelSerializer.serializer_field_mapping[MyField] = MyDrfField
answered Nov 22 '18 at 3:35
Andrew BackerAndrew Backer
4,75623459
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1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
You need to create a custom serializer field that corresponds to your model field, and then add that to the mapping that DRF uses for ModelSerializers.
This is how DRF adds the django.contrib.postgres.fields.* mappings as well.
- Creating Custom Serializer Fields
- DRF adding the postgres fields
Something like this:
class MyField(models.IntegerField):
pass
class MyDrfField(Field):
def to_internal_value(...)
def to_representation(...)
ModelSerializer.serializer_field_mapping[MyField] = MyDrfField
answered Nov 22 '18 at 3:35
Andrew BackerAndrew Backer
4,75623459
add a comment |
You need to create a custom serializer field that corresponds to your model field, and then add that to the mapping that DRF uses for ModelSerializers.
This is how DRF adds the django.contrib.postgres.fields.* mappings as well.
- Creating Custom Serializer Fields
- DRF adding the postgres fields
Something like this:
class MyField(models.IntegerField):
pass
class MyDrfField(Field):
def to_internal_value(...)
def to_representation(...)
ModelSerializer.serializer_field_mapping[MyField] = MyDrfField
answered Nov 22 '18 at 3:35
Andrew BackerAndrew Backer
4,75623459
add a comment |
You need to create a custom serializer field that corresponds to your model field, and then add that to the mapping that DRF uses for ModelSerializers.
This is how DRF adds the django.contrib.postgres.fields.* mappings as well.
- Creating Custom Serializer Fields
- DRF adding the postgres fields
Something like this:
class MyField(models.IntegerField):
pass
class MyDrfField(Field):
def to_internal_value(...)
def to_representation(...)
ModelSerializer.serializer_field_mapping[MyField] = MyDrfField
answered Nov 22 '18 at 3:35
Andrew BackerAndrew Backer
4,75623459
You need to create a custom serializer field that corresponds to your model field, and then add that to the mapping that DRF uses for ModelSerializers.
This is how DRF adds the django.contrib.postgres.fields.* mappings as well.
- Creating Custom Serializer Fields
- DRF adding the postgres fields
Something like this:
class MyField(models.IntegerField):
pass
class MyDrfField(Field):
def to_internal_value(...)
def to_representation(...)
ModelSerializer.serializer_field_mapping[MyField] = MyDrfField
answered Nov 22 '18 at 3:35
Andrew BackerAndrew Backer
4,75623459
edited Nov 23 '18 at 4:40
answered Nov 22 '18 at 3:35
Andrew BackerAndrew Backer
4,75623459
answered Nov 22 '18 at 3:35
Andrew BackerAndrew Backer
4,75623459
answered Nov 22 '18 at 3:35
Andrew BackerAndrew Backer
4,75623459
4,75623459
add a comment |
add a comment |
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