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https://github.com/graphql-python/graphene-django.git
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129 lines
3.8 KiB
Python
129 lines
3.8 KiB
Python
from django.core.exceptions import ImproperlyConfigured
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from rest_framework import serializers
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import graphene
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from ..registry import get_global_registry
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from ..utils import import_single_dispatch
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from .types import DictType
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singledispatch = import_single_dispatch()
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@singledispatch
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def get_graphene_type_from_serializer_field(field):
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raise ImproperlyConfigured(
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"Don't know how to convert the serializer field %s (%s) "
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"to Graphene type" % (field, field.__class__)
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)
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def convert_serializer_field(field, is_input=True):
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"""
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Converts a django rest frameworks field to a graphql field
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and marks the field as required if we are creating an input type
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and the field itself is required
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"""
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graphql_type = get_graphene_type_from_serializer_field(field)
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args = []
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kwargs = {
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'description': field.help_text,
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'required': is_input and field.required,
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}
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# if it is a tuple or a list it means that we are returning
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# the graphql type and the child type
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if isinstance(graphql_type, (list, tuple)):
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kwargs['of_type'] = graphql_type[1]
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graphql_type = graphql_type[0]
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if isinstance(field, serializers.ModelSerializer):
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if is_input:
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graphql_type = convert_serializer_to_input_type(field.__class__)
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else:
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global_registry = get_global_registry()
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field_model = field.Meta.model
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args = [global_registry.get_type_for_model(field_model)]
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return graphql_type(*args, **kwargs)
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def convert_serializer_to_input_type(serializer_class):
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serializer = serializer_class()
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items = {
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name: convert_serializer_field(field)
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for name, field in serializer.fields.items()
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}
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return type(
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'{}Input'.format(serializer.__class__.__name__),
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(graphene.InputObjectType,),
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items
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)
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@get_graphene_type_from_serializer_field.register(serializers.Field)
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def convert_serializer_field_to_string(field):
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return graphene.String
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@get_graphene_type_from_serializer_field.register(serializers.ModelSerializer)
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def convert_serializer_to_field(field):
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return graphene.Field
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@get_graphene_type_from_serializer_field.register(serializers.IntegerField)
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def convert_serializer_field_to_int(field):
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return graphene.Int
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@get_graphene_type_from_serializer_field.register(serializers.BooleanField)
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def convert_serializer_field_to_bool(field):
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return graphene.Boolean
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@get_graphene_type_from_serializer_field.register(serializers.FloatField)
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@get_graphene_type_from_serializer_field.register(serializers.DecimalField)
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def convert_serializer_field_to_float(field):
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return graphene.Float
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@get_graphene_type_from_serializer_field.register(serializers.DateTimeField)
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def convert_serializer_field_to_datetime_time(field):
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return graphene.types.datetime.DateTime
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@get_graphene_type_from_serializer_field.register(serializers.DateField)
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def convert_serializer_field_to_date_time(field):
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return graphene.types.datetime.Date
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@get_graphene_type_from_serializer_field.register(serializers.TimeField)
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def convert_serializer_field_to_time(field):
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return graphene.types.datetime.Time
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@get_graphene_type_from_serializer_field.register(serializers.ListField)
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def convert_serializer_field_to_list(field, is_input=True):
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child_type = get_graphene_type_from_serializer_field(field.child)
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return (graphene.List, child_type)
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@get_graphene_type_from_serializer_field.register(serializers.DictField)
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def convert_serializer_field_to_dict(field):
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return DictType
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@get_graphene_type_from_serializer_field.register(serializers.JSONField)
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def convert_serializer_field_to_jsonstring(field):
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return graphene.types.json.JSONString
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@get_graphene_type_from_serializer_field.register(serializers.MultipleChoiceField)
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def convert_serializer_field_to_list_of_string(field):
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return (graphene.List, graphene.String)
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