✨ execute operation with external context

[chengcyber]

Use case

1. create server via apollo-server-koa, context is a function which injects Koa.Context

import { ApolloServer } from 'apollo-server-koa';

const server = new ApolloServer({
  schema // ...
  context(ctx) {
    return {
      service: ctx.service
    };
  },
 // ...
})

2. execute operation with the server, lose Koa.Context...

server.executeOperation({
  query: `` // ...
})

How to solve

server.executeOperation(
  {
    query: `` // ...
  }, 
  /* provide koa context manually */
  ctx
)

Why

integration apollo server like apollo-server-koa extends ApolloServerBase, and leverage graphQLServerOptions to inject Koa context

  async createGraphQLServerOptions(ctx: Koa.Context): Promise<GraphQLOptions> {
    return super.graphQLServerOptions({ ctx });
  }

while, executeOperation is a instance method of ApolloServerBase

  public async executeOperation(request: GraphQLRequest) {
    const options = await this.graphQLServerOptions(); // no way to provide koa context here...

After this PR merged, there is a way for executeOperation to provide integration context (koa context here).

Related issue

#2886

[apollo-cla]

@chengcyber: Thank you for submitting a pull request! Before we can merge it, you'll need to sign the Apollo Contributor License Agreement here: https://contribute.apollographql.com/

[glasser]

Thanks for the PR! Sorry for the delay. I added a comment on the method and a CHANGELOG entry.

[glasser]

I've released a prerelease with this fix, version 2.23.0-alpha.0. Try out the alpha and see if it works for you! Please provide any feedback in #5094.

[glasser]

This is released in Apollo Server 2.23.0.