udemy-graphql/main.py

from graphene import Schema, ObjectType, String, Int, Field, List, Mutation

class UserType(ObjectType):
    id = Int()
    name = String()
    age = Int()

class CreateUser(Mutation):
    class Arguments:
        name = String()
        age = Int()

    user = Field(UserType)

    @staticmethod
    def mutate(info, name, age):
        user = {"id": len(Query.users) + 1, "name": name, "age": age}
        Query.users.append(user)
        return CreateUser(user=user)

class Query(ObjectType):
    user = Field(UserType, user_id=Int())
    users_by_min_age = List(UserType, min_age=Int())

    users = [
            {"id": 1, "name": "Tyrel Souza", "age": 35},
            {"id": 2, "name": "Lauren Feldman", "age": 38},
            {"id": 3, "name": "Astrid Feldman", "age": 0},
        ]

    @staticmethod
    def resolve_user(root, info, user_id):
        matched_users = [user for user in Query.users if user["id"] == user_id]
        return matched_users[0] if matched_users else None

    @staticmethod
    def resolve_users_by_min_age(root, info, min_age):
        return [user for user in Query.users if user["age"] >= min_age]


class Mutation(ObjectType):
    create_user = CreateUser.Field()

class UpdateUser(Mutation):
    class Arguments:
        name


schema = Schema(query=Query, mutation=Mutation)

gql = """
query {
    user(userId: 4) {
        id
        name
        age
    }
}
"""

gql2 = """
mutation{
    createUser(name: "Jill", age: 61) {
        user {
            id
            name
            age
        }
    }
}
"""
gql3 = """
query {
    usersByMinAge(minAge: 0) {
        id
        name
        age
    }
}
"""


if __name__ == "__main__":
    res = schema.execute(gql)
    print(res)
    res = schema.execute(gql2)
    print(res)
    res = schema.execute(gql3)
    print(res)