Dynamic schema

[sunli829]

Async-graphql will support fully dynamic schema, a preview will be released this week, it will be great to use in combination with seaography.

  let myobj = Object::new("MyObj")
            .field(Field::new("a", TypeRef::INT, Value::from(123)))
            .field(Field::new("b", TypeRef::STRING, Value::from("abc")));

        let query = Object::new("Query")
            .field(Field::new("value", TypeRef::INT, Value::from(100)))
            .field(Field::new(
                "valueObj",
                TypeRef::new("MyObj"),
                ResolverFn::new(|_| async { Ok(FieldValue::NULL) }),
            ));
        let schema = Schema::build("Query", None)
            .register(query)
            .register(myobj)
            .finish()
            .unwrap();

        assert_eq!(
            schema
                .execute("{ value valueObj { a b } }")
                .await
                .into_result()
                .unwrap()
                .data,
            value!({
                "value": 100,
                "valueObj": {
                    "a": 123,
                    "b": "abc",
                }
            })
        );

[karatakis]

@sunli829 thanks for the heads up. This will make things wayyyy easier. I can convert the database schema to graphql on startup 🤩. No need to compile on changes.

[billy1624]

Hey @sunli829, Is there a full demo on the dynamic schema v.s. static schema? I just saw the code snippet on the README.md but not a complete Rust example. Thanks!!

[sunli829]

There is a small example on each GraphQL type.

https://docs.rs/async-graphql/5.0.0-alpha.2/async_graphql/dynamic/struct.Scalar.html
https://docs.rs/async-graphql/5.0.0-alpha.2/async_graphql/dynamic/struct.Object.html
https://docs.rs/async-graphql/5.0.0-alpha.2/async_graphql/dynamic/struct.Interface.html
https://docs.rs/async-graphql/5.0.0-alpha.2/async_graphql/dynamic/struct.Union.html
https://docs.rs/async-graphql/5.0.0-alpha.2/async_graphql/dynamic/struct.InputObject.html

I will add more complete examples. 🙂

[billy1624]

Thanks for the great work!! @sunli829

[sunli829]

I added a dynamic-starwars example.

https://github.com/async-graphql/examples/tree/master/models/dynamic-starwars

try it:

https://github.com/async-graphql/examples/tree/master/poem/dynamic-starwars

[tyt2y3]

Thank you @sunli829

[karatakis]

Thanks @sunli829 👏

[karatakis]

@sunli829 you can see it in action in #114