Created
July 16, 2020 00:06
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| from graphene import InputObjectType, ObjectType, Schema, String, ID, Field, List | |
| class UserSchema(ObjectType): | |
| username = String() | |
| first_name = String() | |
| class PostSchema(ObjectType): | |
| id = ID() | |
| tag = String() | |
| title = String() | |
| user = Field(UserSchema) | |
| class UserInputSchema(InputObjectType): | |
| username = String() | |
| first_name = String() | |
| class QueryType(ObjectType): | |
| posts = List( | |
| PostSchema, | |
| id=ID(), | |
| tag=String(), | |
| title=String(), | |
| user=UserInputSchema() | |
| ) | |
| def resolve_posts(self, info, *args, **context): | |
| return search(POSTS, **context) | |
| USERS = [ | |
| {'username': 'veronica', 'first_name': 'Veronica'}, | |
| {'username': 'victor', 'first_name': 'Victor'}, | |
| ] | |
| POSTS = [ | |
| {'id': 1, 'user': USERS[0], 'tag': 'science', 'title': 'Food marketing'}, | |
| {'id': 2, 'user': USERS[0], 'tag': 'finance', 'title': 'Leasing'}, | |
| {'id': 3, 'user': USERS[1], 'tag': 'science', 'title': 'Physical modeling'}, | |
| {'id': 4, 'user': USERS[1], 'tag': 'python', 'title': 'Metaclass'}, | |
| ] | |
| def search(rows, **filters): | |
| for row in rows: | |
| for field, value in filters.items(): | |
| if field not in row: | |
| break | |
| if not isinstance(value, dict): | |
| if row[field] != value: | |
| break | |
| elif not list(search([row[field]], **value)): | |
| break | |
| else: | |
| yield row | |
| if __name__ == '__main__': | |
| schema = Schema(QueryType, auto_camelcase=False) | |
| query = """ | |
| query { | |
| posts (tag: "science", user: {username: "victor"}) { | |
| id, | |
| title, | |
| user { | |
| # Note that I moved the username filter the posts field, as affects its resolution | |
| username, | |
| first_name | |
| } | |
| } | |
| } | |
| """ | |
| result = schema.execute(query) | |
| if result.errors: | |
| for error in result.errors: | |
| print(error.args, error.locations) | |
| else: | |
| for post in result.data['posts']: | |
| print(post) |
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