graphql-codegen-modules-gen

Welcome to graphql-codegen-modules-gen 🔥

💡 Motivation

To use Graphql-Modules well, you need to organize your code by modules (that's the all point 😉).

Something like:

...
├── modules
│   │
│   ├── user
│   │   └── graphql                        <-- client graphql operations
│   │   │   └── FRAG.user.gql
│   │   │   └── MUTATION.CreateUser.gql
│   │   │   └── QUERY.GetUser.gql
│   │   │   └── QUERY.GetUsers.gql
│   │   └── resolvers                      <-- server graphql resolvers
│   │   │   └── _Mutation.ts
│   │   │   └── _Query.ts
│   │   │   └── User.ts
│   │   └── typedefs                       <-- server graphql type definitions
│   │   │   └── _Mutation.graphql
│   │   │   └── _Query.graphql
│   │   │   └── TYPE.User.graphql
│   │   └── index.ts                       <-- server module creation / orchestration
│   │
│   ├── module2
│   │   └── graphql
│   │   │   └── ...
│   │   └── resolvers
│   │   │   └── ...
│   │   └── typedefs
│   │   │   └── ...
│   │   └── index.ts
│   │
│   ├── module3
│   │   └── ...
...

In index.ts of each module, you will bring all your resolvers and type definitions together. To do this, you can use GraphQL Tools - Merging resolvers and the merge will be done at runtime. Unfortunately, it will not work well with bundlers (check this)

That's why graphql-codegen-modules-gen exist. The cli, will generate you resolvers.ts and typedefs.ts per module at build time. Then, you will compose your index.ts with these files.

🛠 Usage

▶ Install

yarn add graphql-codegen-modules-gen -D

▶ Add in your package.json

"gen-mg": "yarn graphql-codegen-modules-gen ./src/lib/modules",

replacing ./src/lib/modules by the location of your modules

▶ Run it

yarn gen-mg

▶ Add it at the end of your usual @graphql-codegen

At the end of your codegen.yml file, add:

hooks:
  afterAllFileWrite:
    - yarn gen-mg

✨ Result

A new folder named _gen with resolvers.ts and typedefs.ts containing everything needed in your index.ts file.

...
├── modules
│   │
│   ├── user
│   │   └── _gen                           <-- ✨ new folder (I put it in the .gitignore)
│   │   │   └── resolvers.ts               <-- ✨ new file, combine resolvers, export resolvers
│   │   │   └── typedefs.ts                <-- ✨ new file, merged typedefs, export typedefs
│   │   └── graphql
│   │   │   └── FRAG.user.gql
│   │   │   └── MUTATION.CreateUser.gql
│   │   │   └── QUERY.GetUser.gql
│   │   │   └── QUERY.GetUsers.gql
│   │   └── resolvers
│   │   │   └── _Mutation.ts
│   │   │   └── _Query.ts
│   │   │   └── User.ts
│   │   └── typedefs
│   │   │   └── _Mutation.graphql
│   │   │   └── _Query.graphql
│   │   │   └── TYPE.User.graphql
│   │   └── index.ts
│   │
│   ├── module2
│   │   └── graphql
│   │   │   └── ...
│   │   └── resolvers
│   │   │   └── ...
│   │   └── typedefs
│   │   │   └── ...
│   │   └── index.ts
│   │
│   ├── module3
│   │   └── ...
...

And here is how my index.ts file looks like:

import { createModule } from 'graphql-modules';
import { resolvers } from './_gen/resolvers';
import { typeDefs } from './_gen/typedefs';

export const userModule = createModule({
	id: 'user-module',
	typeDefs,
	resolvers,
	providers: [],
	middlewares: {
		'*': {
			'*': []
		}
	}
});

Now, enjoy! 🔥