Django REST Framework lookup_field to ReadOnlyField with source
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0
I have a class:
from django.contrib.contenttypes.models import ContentType
import basehash
class Hasher(object):
base62 = basehash.base62()
@classmethod
def from_model(cls, obj, klass=None):
if obj.pk is None:
return None
return cls.make_hash(obj.pk, klass if klass is not None else obj)
@classmethod
def make_hash(cls, object_pk, klass):
content_type = ContentType.objects.get_for_model(
klass, for_concrete_model=False
)
return cls.base62.hash(
"%(contenttype_pk)03d%(object_pk)06d"
% {"contenttype_pk": content_type.pk, "object_pk": object_pk}
)
@classmethod
def parse_hash(cls, obj_hash):
unhashed = "%09d" % cls.base62.unhash(obj_hash)
contenttype_pk = int(unhashed[:-6])
object_pk = int(unhashed[-6:])
return contenttype_pk, object_pk
@classmethod
def to_object_pk(cls, obj_hash):
return cls.parse_hash(obj_hash)[1]
And models:
class HashableModel(Model):
"""Provide a hash property for models."""
class Meta:
abstract = True
@property
def hash(self):
return Hasher.from_model(self)
class Contest(HashableModel, Base): # type: ignore
event = ForeignKey("events.Event", on_delete=CASCADE, related_name="contests")
owner = ForeignKey(
settings.AUTH_USER_MODEL, on_delete=CASCADE, related_name="contests"
)
members = ManyToManyField(settings.AUTH_USER_MODEL, blank=True)
And serializer returns hash instead of id
class ContestSerializer(serializers.ModelSerializer):
"""Serialize a `contests.Contest` instance."""
id = serializers.ReadOnlyField(source="hash")
event = EventSerializer()
owner = UserSerializer()
members = UserSerializer(many=True)
class Meta:
model = Contest
lookup_field = "id"
exclude = ("is_removed",)
class ContestViewSet(
mixins.CreateModelMixin,
mixins.ListModelMixin,
mixins.RetrieveModelMixin,
viewsets.GenericViewSet,
):
"""
A simple ViewSet for creating and viewing contests.
"""
queryset = Contest.objects.all()
serializer_class = ContestSerializer
lookup_field = "id"
But, if I want to get an object by hash, not an id, I don’t get a result.
How can I get an object by hash?
python django django-rest-framework
asked Jan 3 at 21:42
Narnik GamarnikNarnik Gamarnik
321214
add a comment |
0
I have a class:
from django.contrib.contenttypes.models import ContentType
import basehash
class Hasher(object):
base62 = basehash.base62()
@classmethod
def from_model(cls, obj, klass=None):
if obj.pk is None:
return None
return cls.make_hash(obj.pk, klass if klass is not None else obj)
@classmethod
def make_hash(cls, object_pk, klass):
content_type = ContentType.objects.get_for_model(
klass, for_concrete_model=False
)
return cls.base62.hash(
"%(contenttype_pk)03d%(object_pk)06d"
% {"contenttype_pk": content_type.pk, "object_pk": object_pk}
)
@classmethod
def parse_hash(cls, obj_hash):
unhashed = "%09d" % cls.base62.unhash(obj_hash)
contenttype_pk = int(unhashed[:-6])
object_pk = int(unhashed[-6:])
return contenttype_pk, object_pk
@classmethod
def to_object_pk(cls, obj_hash):
return cls.parse_hash(obj_hash)[1]
And models:
class HashableModel(Model):
"""Provide a hash property for models."""
class Meta:
abstract = True
@property
def hash(self):
return Hasher.from_model(self)
class Contest(HashableModel, Base): # type: ignore
event = ForeignKey("events.Event", on_delete=CASCADE, related_name="contests")
owner = ForeignKey(
settings.AUTH_USER_MODEL, on_delete=CASCADE, related_name="contests"
)
members = ManyToManyField(settings.AUTH_USER_MODEL, blank=True)
And serializer returns hash instead of id
class ContestSerializer(serializers.ModelSerializer):
"""Serialize a `contests.Contest` instance."""
id = serializers.ReadOnlyField(source="hash")
event = EventSerializer()
owner = UserSerializer()
members = UserSerializer(many=True)
class Meta:
model = Contest
lookup_field = "id"
exclude = ("is_removed",)
class ContestViewSet(
mixins.CreateModelMixin,
mixins.ListModelMixin,
mixins.RetrieveModelMixin,
viewsets.GenericViewSet,
):
"""
A simple ViewSet for creating and viewing contests.
"""
queryset = Contest.objects.all()
serializer_class = ContestSerializer
lookup_field = "id"
But, if I want to get an object by hash, not an id, I don’t get a result.
How can I get an object by hash?
python django django-rest-framework
asked Jan 3 at 21:42
Narnik GamarnikNarnik Gamarnik
321214
Is yourhasha DB field or a property?
– JPG
Jan 4 at 4:09
@JPG,property
– Narnik Gamarnik
Jan 10 at 22:35
add a comment |
0
0
0
I have a class:
from django.contrib.contenttypes.models import ContentType
import basehash
class Hasher(object):
base62 = basehash.base62()
@classmethod
def from_model(cls, obj, klass=None):
if obj.pk is None:
return None
return cls.make_hash(obj.pk, klass if klass is not None else obj)
@classmethod
def make_hash(cls, object_pk, klass):
content_type = ContentType.objects.get_for_model(
klass, for_concrete_model=False
)
return cls.base62.hash(
"%(contenttype_pk)03d%(object_pk)06d"
% {"contenttype_pk": content_type.pk, "object_pk": object_pk}
)
@classmethod
def parse_hash(cls, obj_hash):
unhashed = "%09d" % cls.base62.unhash(obj_hash)
contenttype_pk = int(unhashed[:-6])
object_pk = int(unhashed[-6:])
return contenttype_pk, object_pk
@classmethod
def to_object_pk(cls, obj_hash):
return cls.parse_hash(obj_hash)[1]
And models:
class HashableModel(Model):
"""Provide a hash property for models."""
class Meta:
abstract = True
@property
def hash(self):
return Hasher.from_model(self)
class Contest(HashableModel, Base): # type: ignore
event = ForeignKey("events.Event", on_delete=CASCADE, related_name="contests")
owner = ForeignKey(
settings.AUTH_USER_MODEL, on_delete=CASCADE, related_name="contests"
)
members = ManyToManyField(settings.AUTH_USER_MODEL, blank=True)
And serializer returns hash instead of id
class ContestSerializer(serializers.ModelSerializer):
"""Serialize a `contests.Contest` instance."""
id = serializers.ReadOnlyField(source="hash")
event = EventSerializer()
owner = UserSerializer()
members = UserSerializer(many=True)
class Meta:
model = Contest
lookup_field = "id"
exclude = ("is_removed",)
class ContestViewSet(
mixins.CreateModelMixin,
mixins.ListModelMixin,
mixins.RetrieveModelMixin,
viewsets.GenericViewSet,
):
"""
A simple ViewSet for creating and viewing contests.
"""
queryset = Contest.objects.all()
serializer_class = ContestSerializer
lookup_field = "id"
But, if I want to get an object by hash, not an id, I don’t get a result.
How can I get an object by hash?
python django django-rest-framework
asked Jan 3 at 21:42
Narnik GamarnikNarnik Gamarnik
321214
I have a class:
from django.contrib.contenttypes.models import ContentType
import basehash
class Hasher(object):
base62 = basehash.base62()
@classmethod
def from_model(cls, obj, klass=None):
if obj.pk is None:
return None
return cls.make_hash(obj.pk, klass if klass is not None else obj)
@classmethod
def make_hash(cls, object_pk, klass):
content_type = ContentType.objects.get_for_model(
klass, for_concrete_model=False
)
return cls.base62.hash(
"%(contenttype_pk)03d%(object_pk)06d"
% {"contenttype_pk": content_type.pk, "object_pk": object_pk}
)
@classmethod
def parse_hash(cls, obj_hash):
unhashed = "%09d" % cls.base62.unhash(obj_hash)
contenttype_pk = int(unhashed[:-6])
object_pk = int(unhashed[-6:])
return contenttype_pk, object_pk
@classmethod
def to_object_pk(cls, obj_hash):
return cls.parse_hash(obj_hash)[1]
And models:
class HashableModel(Model):
"""Provide a hash property for models."""
class Meta:
abstract = True
@property
def hash(self):
return Hasher.from_model(self)
class Contest(HashableModel, Base): # type: ignore
event = ForeignKey("events.Event", on_delete=CASCADE, related_name="contests")
owner = ForeignKey(
settings.AUTH_USER_MODEL, on_delete=CASCADE, related_name="contests"
)
members = ManyToManyField(settings.AUTH_USER_MODEL, blank=True)
And serializer returns hash instead of id
class ContestSerializer(serializers.ModelSerializer):
"""Serialize a `contests.Contest` instance."""
id = serializers.ReadOnlyField(source="hash")
event = EventSerializer()
owner = UserSerializer()
members = UserSerializer(many=True)
class Meta:
model = Contest
lookup_field = "id"
exclude = ("is_removed",)
class ContestViewSet(
mixins.CreateModelMixin,
mixins.ListModelMixin,
mixins.RetrieveModelMixin,
viewsets.GenericViewSet,
):
"""
A simple ViewSet for creating and viewing contests.
"""
queryset = Contest.objects.all()
serializer_class = ContestSerializer
lookup_field = "id"
But, if I want to get an object by hash, not an id, I don’t get a result.
How can I get an object by hash?
python django django-rest-framework
python django django-rest-framework
asked Jan 3 at 21:42
Narnik GamarnikNarnik Gamarnik
321214
asked Jan 3 at 21:42
Narnik GamarnikNarnik Gamarnik
321214
asked Jan 3 at 21:42
Narnik GamarnikNarnik Gamarnik
321214
asked Jan 3 at 21:42
Narnik GamarnikNarnik Gamarnik
321214
asked Jan 3 at 21:42
Narnik GamarnikNarnik Gamarnik
321214
321214
Is yourhasha DB field or a property?
– JPG
Jan 4 at 4:09
@JPG,property
– Narnik Gamarnik
Jan 10 at 22:35
add a comment |
Is yourhasha DB field or a property?
– JPG
Jan 4 at 4:09
@JPG,property
– Narnik Gamarnik
Jan 10 at 22:35
Is your
hash a DB field or a property?– JPG
Jan 4 at 4:09
Is your
hash a DB field or a property?– JPG
Jan 4 at 4:09
@JPG,
property– Narnik Gamarnik
Jan 10 at 22:35
@JPG,
property– Narnik Gamarnik
Jan 10 at 22:35
add a comment |
0
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Is your
hasha DB field or a property?– JPG
Jan 4 at 4:09
@JPG,
property– Narnik Gamarnik
Jan 10 at 22:35