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import asyncio
from typing import cast
from graphql import (
GraphQLArgument,
GraphQLEnumType,
GraphQLEnumValue,
GraphQLField,
GraphQLInputField,
GraphQLInputObjectType,
GraphQLInt,
GraphQLInterfaceType,
GraphQLList,
GraphQLNonNull,
GraphQLObjectType,
GraphQLSchema,
GraphQLString,
IntrospectionQuery,
get_introspection_query,
graphql_sync,
print_schema,
)
from .fixtures import (
create_review,
get_characters,
get_droid,
get_friends,
get_hero_async,
get_human,
reviews,
)
episode_enum = GraphQLEnumType(
"Episode",
{
"NEWHOPE": GraphQLEnumValue(
4,
description="Released in 1977.",
),
"EMPIRE": GraphQLEnumValue(
5,
description="Released in 1980.",
),
"JEDI": GraphQLEnumValue(
6,
description="Released in 1983.",
),
},
description="One of the films in the Star Wars Trilogy",
)
human_type: GraphQLObjectType
droid_type: GraphQLObjectType
character_interface = GraphQLInterfaceType(
"Character",
lambda: {
"id": GraphQLField(
GraphQLNonNull(GraphQLString), description="The id of the character."
),
"name": GraphQLField(GraphQLString, description="The name of the character."),
"friends": GraphQLField(
GraphQLList(character_interface), # type: ignore
description="The friends of the character,"
" or an empty list if they have none.",
),
"appearsIn": GraphQLField(
GraphQLList(episode_enum), description="Which movies they appear in."
),
},
resolve_type=lambda character, _info, _type: {
"Human": human_type.name,
"Droid": droid_type.name,
}[character.type],
description="A character in the Star Wars Trilogy",
)
human_type = GraphQLObjectType(
"Human",
lambda: {
"id": GraphQLField(
GraphQLNonNull(GraphQLString),
description="The id of the human.",
),
"name": GraphQLField(
GraphQLString,
description="The name of the human.",
),
"friends": GraphQLField(
GraphQLList(character_interface),
description="The friends of the human, or an empty list if they have none.",
resolve=lambda human, _info: get_friends(human),
),
"appearsIn": GraphQLField(
GraphQLList(episode_enum),
description="Which movies they appear in.",
),
"homePlanet": GraphQLField(
GraphQLString,
description="The home planet of the human, or null if unknown.",
),
},
interfaces=[character_interface],
description="A humanoid creature in the Star Wars universe.",
)
droid_type = GraphQLObjectType(
"Droid",
lambda: {
"id": GraphQLField(
GraphQLNonNull(GraphQLString),
description="The id of the droid.",
),
"name": GraphQLField(
GraphQLString,
description="The name of the droid.",
),
"friends": GraphQLField(
GraphQLList(character_interface),
description="The friends of the droid, or an empty list if they have none.",
resolve=lambda droid, _info: get_friends(droid),
),
"appearsIn": GraphQLField(
GraphQLList(episode_enum),
description="Which movies they appear in.",
),
"primaryFunction": GraphQLField(
GraphQLString,
description="The primary function of the droid.",
),
},
interfaces=[character_interface],
description="A mechanical creature in the Star Wars universe.",
)
review_type = GraphQLObjectType(
"Review",
lambda: {
"episode": GraphQLField(episode_enum, description="The movie"),
"stars": GraphQLField(
GraphQLNonNull(GraphQLInt),
description="The number of stars this review gave, 1-5",
),
"commentary": GraphQLField(
GraphQLString, description="Comment about the movie"
),
},
description="Represents a review for a movie",
)
review_input_type = GraphQLInputObjectType(
"ReviewInput",
lambda: {
"stars": GraphQLInputField(GraphQLInt, description="0-5 stars"),
"commentary": GraphQLInputField(
GraphQLString, description="Comment about the movie, optional"
),
"deprecated_input_field": GraphQLInputField(
GraphQLString,
description="deprecated field example",
deprecation_reason="deprecated for testing",
),
},
description="The input object sent when someone is creating a new review",
)
query_type = GraphQLObjectType(
"Query",
lambda: {
"hero": GraphQLField(
character_interface,
args={
"episode": GraphQLArgument(
episode_enum,
description="If omitted, returns the hero of the whole saga. If "
"provided, returns the hero of that particular episode.",
)
},
resolve=lambda _source, _info, episode=None: get_hero_async(episode),
),
"human": GraphQLField(
human_type,
args={
"id": GraphQLArgument(
description="id of the human",
type_=GraphQLNonNull(GraphQLString),
)
},
resolve=lambda _source, _info, id: get_human(id),
),
"droid": GraphQLField(
droid_type,
args={
"id": GraphQLArgument(
description="id of the droid",
type_=GraphQLNonNull(GraphQLString),
)
},
resolve=lambda _source, _info, id: get_droid(id),
),
"characters": GraphQLField(
GraphQLList(character_interface),
args={
"ids": GraphQLArgument(
GraphQLList(GraphQLString),
description="list of character ids",
)
},
resolve=lambda _source, _info, ids=None: get_characters(ids),
),
},
)
mutation_type = GraphQLObjectType(
"Mutation",
lambda: {
"createReview": GraphQLField(
review_type,
args={
"episode": GraphQLArgument(
episode_enum,
description="Episode to create review",
),
"review": GraphQLArgument(
description="set alive status",
type_=review_input_type,
),
},
resolve=lambda _source, _info, episode=None, review=None: create_review(
episode, review
),
),
},
description="The mutation type, represents all updates we can make to our data",
)
async def subscribe_reviews(_root, _info, episode):
for review in reviews[episode]:
yield review
await asyncio.sleep(0.1)
async def resolve_review(review, _info, **_args):
return review
subscription_type = GraphQLObjectType(
"Subscription",
lambda: {
"reviewAdded": GraphQLField(
review_type,
args={
"episode": GraphQLArgument(
episode_enum,
description="Episode to review",
)
},
subscribe=subscribe_reviews,
resolve=resolve_review,
)
},
)
StarWarsSchema = GraphQLSchema(
query=query_type,
mutation=mutation_type,
subscription=subscription_type,
types=[human_type, droid_type, review_type, review_input_type],
)
StarWarsIntrospection = cast(
IntrospectionQuery, graphql_sync(StarWarsSchema, get_introspection_query()).data
)
StarWarsTypeDef = print_schema(StarWarsSchema)
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