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|
from typing import Optional, Union, List
from graphql.execution import execute_sync
from graphql.language import parse
from graphql.type import (
GraphQLBoolean,
GraphQLField,
GraphQLInterfaceType,
GraphQLList,
GraphQLObjectType,
GraphQLSchema,
GraphQLString,
GraphQLUnionType,
)
class Dog:
name: str
barks: bool
mother: Optional["Dog"]
father: Optional["Dog"]
progeny: List["Dog"]
def __init__(self, name: str, barks: bool):
self.name = name
self.barks = barks
self.mother = None
self.father = None
self.progeny = []
class Cat:
name: str
meows: bool
mother: Optional["Cat"]
father: Optional["Cat"]
progeny: List["Cat"]
def __init__(self, name: str, meows: bool):
self.name = name
self.meows = meows
self.mother = None
self.father = None
self.progeny = []
class Person:
name: str
pets: Optional[List[Union[Dog, Cat]]]
friends: Optional[List[Union[Dog, Cat, "Person"]]]
def __init__(
self,
name: str,
pets: Optional[List[Union[Dog, Cat]]] = None,
friends: Optional[List[Union[Dog, Cat, "Person"]]] = None,
):
self.name = name
self.pets = pets
self.friends = friends
NamedType = GraphQLInterfaceType("Named", {"name": GraphQLField(GraphQLString)})
LifeType = GraphQLInterfaceType(
"Life", lambda: {"progeny": GraphQLField(GraphQLList(LifeType))} # type: ignore
)
MammalType = GraphQLInterfaceType(
"Mammal",
lambda: {
"progeny": GraphQLField(GraphQLList(MammalType)), # type: ignore
"mother": GraphQLField(MammalType), # type: ignore
"father": GraphQLField(MammalType), # type: ignore
},
interfaces=[LifeType],
)
DogType = GraphQLObjectType(
"Dog",
lambda: {
"name": GraphQLField(GraphQLString),
"barks": GraphQLField(GraphQLBoolean),
"progeny": GraphQLField(GraphQLList(DogType)), # type: ignore
"mother": GraphQLField(DogType), # type: ignore
"father": GraphQLField(DogType), # type: ignore
},
interfaces=[MammalType, LifeType, NamedType],
is_type_of=lambda value, info: isinstance(value, Dog),
)
CatType = GraphQLObjectType(
"Cat",
lambda: {
"name": GraphQLField(GraphQLString),
"meows": GraphQLField(GraphQLBoolean),
"progeny": GraphQLField(GraphQLList(CatType)), # type: ignore
"mother": GraphQLField(CatType), # type: ignore
"father": GraphQLField(CatType), # type: ignore
},
interfaces=[MammalType, LifeType, NamedType],
is_type_of=lambda value, info: isinstance(value, Cat),
)
def resolve_pet_type(value, _info, _type):
if isinstance(value, Dog):
return DogType.name
if isinstance(value, Cat):
return CatType.name
# Not reachable. All possible types have been considered.
assert False, "Unexpected pet type"
PetType = GraphQLUnionType("Pet", [DogType, CatType], resolve_type=resolve_pet_type)
PersonType = GraphQLObjectType(
"Person",
lambda: {
"name": GraphQLField(GraphQLString),
"pets": GraphQLField(GraphQLList(PetType)),
"friends": GraphQLField(GraphQLList(NamedType)),
"progeny": GraphQLField(GraphQLList(PersonType)), # type: ignore
"mother": GraphQLField(PersonType), # type: ignore
"father": GraphQLField(PersonType), # type: ignore
},
interfaces=[NamedType, MammalType, LifeType],
is_type_of=lambda value, _info: isinstance(value, Person),
)
schema = GraphQLSchema(PersonType, types=[PetType])
garfield = Cat("Garfield", False)
garfield.mother = Cat("Garfield's Mom", False)
garfield.mother.progeny = [garfield]
odie = Dog("Odie", True)
odie.mother = Dog("Odie's Mom", True)
odie.mother.progeny = [odie]
liz = Person("Liz", [], [])
john = Person("John", [garfield, odie], [liz, odie])
def describe_execute_union_and_intersection_types():
def can_introspect_on_union_and_intersection_types():
document = parse(
"""
{
Named: __type(name: "Named") {
kind
name
fields { name }
interfaces { name }
possibleTypes { name }
enumValues { name }
inputFields { name }
}
Mammal: __type(name: "Mammal") {
kind
name
fields { name }
interfaces { name }
possibleTypes { name }
enumValues { name }
inputFields { name }
}
Pet: __type(name: "Pet") {
kind
name
fields { name }
interfaces { name }
possibleTypes { name }
enumValues { name }
inputFields { name }
}
}
"""
)
assert execute_sync(schema=schema, document=document) == (
{
"Named": {
"kind": "INTERFACE",
"name": "Named",
"fields": [{"name": "name"}],
"interfaces": [],
"possibleTypes": [
{"name": "Dog"},
{"name": "Cat"},
{"name": "Person"},
],
"enumValues": None,
"inputFields": None,
},
"Mammal": {
"kind": "INTERFACE",
"name": "Mammal",
"fields": [
{"name": "progeny"},
{"name": "mother"},
{"name": "father"},
],
"interfaces": [{"name": "Life"}],
"possibleTypes": [
{"name": "Dog"},
{"name": "Cat"},
{"name": "Person"},
],
"enumValues": None,
"inputFields": None,
},
"Pet": {
"kind": "UNION",
"name": "Pet",
"fields": None,
"interfaces": None,
"possibleTypes": [{"name": "Dog"}, {"name": "Cat"}],
"enumValues": None,
"inputFields": None,
},
},
None,
)
def executes_using_union_types():
# NOTE: This is an *invalid* query, but it should be *executable*.
document = parse(
"""
{
__typename
name
pets {
__typename
name
barks
meows
}
}
"""
)
assert execute_sync(schema=schema, document=document, root_value=john) == (
{
"__typename": "Person",
"name": "John",
"pets": [
{"__typename": "Cat", "name": "Garfield", "meows": False},
{"__typename": "Dog", "name": "Odie", "barks": True},
],
},
None,
)
def executes_union_types_with_inline_fragment():
# This is the valid version of the query in the above test.
document = parse(
"""
{
__typename
name
pets {
__typename
... on Dog {
name
barks
}
... on Cat {
name
meows
}
}
}
"""
)
assert execute_sync(schema=schema, document=document, root_value=john) == (
{
"__typename": "Person",
"name": "John",
"pets": [
{"__typename": "Cat", "name": "Garfield", "meows": False},
{"__typename": "Dog", "name": "Odie", "barks": True},
],
},
None,
)
def executes_using_interface_types():
# NOTE: This is an *invalid* query, but it should be a *executable*.
document = parse(
"""
{
__typename
name
friends {
__typename
name
barks
meows
}
}
"""
)
assert execute_sync(schema=schema, document=document, root_value=john) == (
{
"__typename": "Person",
"name": "John",
"friends": [
{"__typename": "Person", "name": "Liz"},
{"__typename": "Dog", "name": "Odie", "barks": True},
],
},
None,
)
def executes_interface_types_with_inline_fragment():
# This is the valid version of the query in the above test.
document = parse(
"""
{
__typename
name
friends {
__typename
name
... on Dog {
barks
}
... on Cat {
meows
}
... on Mammal {
mother {
__typename
... on Dog {
name
barks
}
... on Cat {
name
meows
}
}
}
}
}
"""
)
assert execute_sync(schema=schema, document=document, root_value=john) == (
{
"__typename": "Person",
"name": "John",
"friends": [
{"__typename": "Person", "name": "Liz", "mother": None},
{
"__typename": "Dog",
"name": "Odie",
"barks": True,
"mother": {
"__typename": "Dog",
"name": "Odie's Mom",
"barks": True,
},
},
],
},
None,
)
def executes_interface_types_with_named_fragments():
document = parse(
"""
{
__typename
name
friends {
__typename
name
...DogBarks
...CatMeows
}
}
fragment DogBarks on Dog {
barks
}
fragment CatMeows on Cat {
meows
}
"""
)
assert execute_sync(schema=schema, document=document, root_value=john) == (
{
"__typename": "Person",
"name": "John",
"friends": [
{"__typename": "Person", "name": "Liz"},
{"__typename": "Dog", "name": "Odie", "barks": True},
],
},
None,
)
def allows_fragment_conditions_to_be_abstract_types():
document = parse(
"""
{
__typename
name
pets {
...PetFields,
...on Mammal {
mother {
...ProgenyFields
}
}
}
friends { ...FriendFields }
}
fragment PetFields on Pet {
__typename
... on Dog {
name
barks
}
... on Cat {
name
meows
}
}
fragment FriendFields on Named {
__typename
name
... on Dog {
barks
}
... on Cat {
meows
}
}
fragment ProgenyFields on Life {
progeny {
__typename
}
}
"""
)
assert execute_sync(schema=schema, document=document, root_value=john) == (
{
"__typename": "Person",
"name": "John",
"pets": [
{
"__typename": "Cat",
"name": "Garfield",
"meows": False,
"mother": {"progeny": [{"__typename": "Cat"}]},
},
{
"__typename": "Dog",
"name": "Odie",
"barks": True,
"mother": {"progeny": [{"__typename": "Dog"}]},
},
],
"friends": [
{"__typename": "Person", "name": "Liz"},
{"__typename": "Dog", "name": "Odie", "barks": True},
],
},
None,
)
# noinspection PyPep8Naming
def gets_execution_info_in_resolver():
encountered = {}
def resolve_type(_source, info, _type):
encountered["context"] = info.context
encountered["schema"] = info.schema
encountered["root_value"] = info.root_value
return PersonType2.name
NamedType2 = GraphQLInterfaceType(
"Named", {"name": GraphQLField(GraphQLString)}, resolve_type=resolve_type
)
PersonType2 = GraphQLObjectType(
"Person",
{
"name": GraphQLField(GraphQLString),
"friends": GraphQLField(GraphQLList(NamedType2)),
},
interfaces=[NamedType2],
)
schema2 = GraphQLSchema(PersonType2)
document = parse("{ name, friends { name } }")
root_value = Person("John", [], [liz])
context_value = {"authToken": "123abc"}
assert execute_sync(
schema=schema2,
document=document,
root_value=root_value,
context_value=context_value,
) == (
{"name": "John", "friends": [{"name": "Liz"}]},
None,
)
assert encountered == {
"schema": schema2,
"root_value": root_value,
"context": context_value,
}
|
