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from django.db import models
from django.utils.encoding import force_text
from graphene import (ID, Boolean, Dynamic, Enum, Field, Float, Int, List,
NonNull, String)
from graphene.relay import is_node
from graphene.types.datetime import DateTime
from graphene.types.json import JSONString
from graphene.utils.str_converters import to_const
from .compat import (ArrayField, HStoreField, JSONField, RangeField,
RelatedObject, UUIDField)
from .fields import get_connection_field
from .utils import get_related_model, import_single_dispatch
singledispatch = import_single_dispatch()
def convert_choice_name(name):
return to_const(force_text(name))
def get_choices(choices):
for value, help_text in choices:
if isinstance(help_text, (tuple, list)):
for choice in get_choices(help_text):
yield choice
else:
name = convert_choice_name(help_text)
description = help_text
yield name, value, description
def convert_django_field_with_choices(field, registry=None):
choices = getattr(field, 'choices', None)
if choices:
meta = field.model._meta
name = '{}{}'.format(meta.object_name, field.name.capitalize())
choices = list(get_choices(choices))
named_choices = [(c[0], c[1]) for c in choices]
named_choices_descriptions = {c[0]: c[2] for c in choices}
class EnumWithDescriptionsType(object):
@property
def description(self):
return named_choices_descriptions[self.name]
enum = Enum(name, list(named_choices), type=EnumWithDescriptionsType)
return enum(description=field.help_text)
return convert_django_field(field, registry)
@singledispatch
def convert_django_field(field, registry=None):
raise Exception(
"Don't know how to convert the Django field %s (%s)" %
(field, field.__class__))
@convert_django_field.register(models.CharField)
@convert_django_field.register(models.TextField)
@convert_django_field.register(models.EmailField)
@convert_django_field.register(models.SlugField)
@convert_django_field.register(models.URLField)
@convert_django_field.register(models.GenericIPAddressField)
@convert_django_field.register(models.FileField)
@convert_django_field.register(UUIDField)
def convert_field_to_string(field, registry=None):
return String(description=field.help_text)
@convert_django_field.register(models.AutoField)
def convert_field_to_id(field, registry=None):
return ID(description=field.help_text)
@convert_django_field.register(models.PositiveIntegerField)
@convert_django_field.register(models.PositiveSmallIntegerField)
@convert_django_field.register(models.SmallIntegerField)
@convert_django_field.register(models.BigIntegerField)
@convert_django_field.register(models.IntegerField)
def convert_field_to_int(field, registry=None):
return Int(description=field.help_text)
@convert_django_field.register(models.BooleanField)
def convert_field_to_boolean(field, registry=None):
return NonNull(Boolean, description=field.help_text)
@convert_django_field.register(models.NullBooleanField)
def convert_field_to_nullboolean(field, registry=None):
return Boolean(description=field.help_text)
@convert_django_field.register(models.DecimalField)
@convert_django_field.register(models.FloatField)
def convert_field_to_float(field, registry=None):
return Float(description=field.help_text)
@convert_django_field.register(models.DateField)
def convert_date_to_string(field, registry=None):
return DateTime(description=field.help_text)
@convert_django_field.register(models.OneToOneRel)
def convert_onetoone_field_to_djangomodel(field, registry=None):
model = get_related_model(field)
def dynamic_type():
_type = registry.get_type_for_model(model)
if not _type:
return
return Field(_type)
return Dynamic(dynamic_type)
@convert_django_field.register(models.ManyToManyField)
@convert_django_field.register(models.ManyToManyRel)
@convert_django_field.register(models.ManyToOneRel)
def convert_field_to_list_or_connection(field, registry=None):
model = get_related_model(field)
def dynamic_type():
_type = registry.get_type_for_model(model)
if not _type:
return
if is_node(_type):
return get_connection_field(_type)
return Field(List(_type))
return Dynamic(dynamic_type)
# For Django 1.6
@convert_django_field.register(RelatedObject)
def convert_relatedfield_to_djangomodel(field, registry=None):
model = field.model
def dynamic_type():
_type = registry.get_type_for_model(model)
if not _type:
return
if is_node(_type):
return get_connection_field(_type)
return Field(List(_type))
return Dynamic(dynamic_type)
@convert_django_field.register(models.OneToOneField)
@convert_django_field.register(models.ForeignKey)
def convert_field_to_djangomodel(field, registry=None):
model = get_related_model(field)
def dynamic_type():
_type = registry.get_type_for_model(model)
if not _type:
return
return Field(_type, description=field.help_text)
return Dynamic(dynamic_type)
@convert_django_field.register(ArrayField)
def convert_postgres_array_to_list(field, registry=None):
base_type = convert_django_field(field.base_field)
if not isinstance(base_type, (List, NonNull)):
base_type = type(base_type)
return List(base_type, description=field.help_text)
@convert_django_field.register(HStoreField)
@convert_django_field.register(JSONField)
def convert_posgres_field_to_string(field, registry=None):
return JSONString(description=field.help_text)
@convert_django_field.register(RangeField)
def convert_posgres_range_to_string(field, registry=None):
inner_type = convert_django_field(field.base_field)
if not isinstance(inner_type, (List, NonNull)):
inner_type = type(inner_type)
return List(inner_type, description=field.help_text)