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|
from __future__ import unicode_literals
from graphql.language.ast import (
BooleanValue,
FloatValue,
IntValue,
ListValue,
ObjectValue,
StringValue,
)
from graphene.types.scalars import MAX_INT, MIN_INT
from .scalars import Scalar
class GenericScalar(Scalar):
"""
The `GenericScalar` scalar type represents a generic
GraphQL scalar value that could be:
String, Boolean, Int, Float, List or Object.
"""
@staticmethod
def identity(value):
return value
serialize = identity
parse_value = identity
@staticmethod
def parse_literal(ast):
if isinstance(ast, (StringValue, BooleanValue)):
return ast.value
elif isinstance(ast, IntValue):
num = int(ast.value)
if MIN_INT <= num <= MAX_INT:
return num
elif isinstance(ast, FloatValue):
return float(ast.value)
elif isinstance(ast, ListValue):
return [GenericScalar.parse_literal(value) for value in ast.values]
elif isinstance(ast, ObjectValue):
return {
field.name.value: GenericScalar.parse_literal(field.value)
for field in ast.fields
}
else:
return None
|
