Hacktoberfest 2026: los issues que los mantenedores marcaron para octubre, abiertos y aptos para principiantes. Explorar issues de Hacktoberfest

Support/help with promise-based resolvers

Abierto
#148 14 comentarios 0 reacciones 2 asignados Ver en GitHub

@AlexCLeduc ya está trabajando en esto.

Desde el 26/11/2021.

Evaluación

Este issue todavía no se ha evaluado.

Descripción

discussion feature help wanted investigate

I think I have a good use-case for non-async, promise-based resolution.

We are making django ORM from our dataloaders. We moved away from using async in django 3.0 because django would force us to isolate ORM calls and wrap them in sync_to_async. Instead, we ditched async and used promises with a generator based syntax. Examples below:

What we'd like to do, but django doesn't allow

class MyDataLoader(...):
    async def batch_load(self, ids):
        data_from_other_loader = await other_loader.load_many(ids)
      	data_from_orm = MyModel.objects.filter(id__in=ids) # error! can't call django ORM from async context. 
        # return processed combination of orm/loader data

What django would like us to do

class MyDataLoader(...):
    async def batch_load(self, ids):
        data_from_other_loader = await other_loader.load_many(ids)
        data_from_orm = await get_orm_data()
        # return processed combination of orm/loader data
    
@sync_to_async
def get_orm_data(ids):
    return MyModel.objects.filter(id__in=ids)

What we settled on instead (ditch async, use generator-syntax around promises)

class MyDataLoader(...):
    def batch_load(self,ids):
        data_from_other_loader = yield other_loader.load_many(ids)
        data_from_orm = MyModel.objects.filter(id__in=ids)
        # return processed combination of orm/loader data

I have a generator_function_to_promise tool that allows this syntax, as well as a middleware that converts generators returned from resolvers into promises. I have hundreds of dataloaders following this pattern. I don't want to be stuck isolating all the ORM calls as per django's recommendations because it's noisy and decreases legibility.

If it's not difficult to re-add promise support, I'd really appreciate it. If not, can anyone think of a solution to my problem?

Lenguaje dominante
Python
Estrellas
531
Forks
147
Sin PR fusionados en 30 d

Guía de contribución

No hay ninguna guía de contribución indexada para este repositorio

Primeros pasos

  1. Lee el issue completo y luego la guía de contribución del proyecto.
  2. Comenta en el issue que vas a ocuparte — evita que dos personas hagan lo mismo.
  3. Haz un fork del repositorio y trabaja en una rama.
  4. Abre un pull request que haga referencia al número del issue.

Más de graphql-python/graphql-core

Todos los issues de graphql-python/graphql-core

Issues similares

Más issues de Python

Recibe los nuevos issues en tu correo

Un resumen breve de issues de GitHub para principiantes.