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https://github.com/nodkz/graphql-compose
Toolkit for generating complex GraphQL Schemas on Node.js
https://github.com/nodkz/graphql-compose
graphql graphql-compose hacktoberfest schema schema-builder toolkit
Last synced: about 1 month ago
JSON representation
Toolkit for generating complex GraphQL Schemas on Node.js
- Host: GitHub
- URL: https://github.com/nodkz/graphql-compose
- Owner: graphql-compose
- License: mit
- Created: 2016-06-07T07:43:40.000Z (over 8 years ago)
- Default Branch: master
- Last Pushed: 2024-05-11T06:03:38.000Z (4 months ago)
- Last Synced: 2024-06-17T05:31:00.036Z (3 months ago)
- Topics: graphql, graphql-compose, hacktoberfest, schema, schema-builder, toolkit
- Language: TypeScript
- Homepage: https://graphql-compose.github.io/
- Size: 4.83 MB
- Stars: 1,204
- Watchers: 22
- Forks: 76
- Open Issues: 86
-
Metadata Files:
- Readme: README.md
- Changelog: CHANGELOG.md
- Funding: .github/FUNDING.yml
- License: LICENSE.md
Awesome Lists containing this project
README
# graphql-compose
[](https://www.npmjs.com/package/graphql-compose)
[](https://codecov.io/github/graphql-compose/graphql-compose)
[](https://travis-ci.org/graphql-compose/graphql-compose)
[](http://www.npmtrends.com/graphql-compose)
[](http://commitizen.github.io/cz-cli/)
[](#backers)
[](#sponsors)
**`graphql-compose`** – provides a type registry with a bunch of methods for programmatic schema construction. It allows not only to extend types but also remove fields, interfaces, args. **If you want to write your graphql schema generator – `graphql-compose` is a good instrument for you.**
* provides methods for editing GraphQL output/input types (add/remove fields/args/interfaces)
* introduces ```Resolver's``` – the named graphql fieldConfigs, which can be used for finding, updating, removing records
* provides an easy way for creating relations between types via ```Resolver's```
* provides converter from `OutputType` to `InputType`
* provides `projection` parser from AST
* provides `GraphQL schema language` for defining simple types
* adds additional types `Date`, `Json`
## And a little bit more
**`graphql-compose-[plugin]`** – are _declarative generators/plugins_ built on top of `graphql-compose`, which take some ORMs, schema definitions and create GraphQL Models from them or modify existing GraphQL Types.
### Type generators built on top `graphql-compose`
* [graphql-compose-json](https://github.com/graphql-compose/graphql-compose-json) - generates GraphQL type from JSON (a good helper for wrapping REST APIs)
* [graphql-compose-mongoose](https://github.com/graphql-compose/graphql-compose-mongoose) - generates GraphQL types from mongoose (MongoDB models) with Resolvers.
* [graphql-compose-elasticsearch](https://github.com/graphql-compose/graphql-compose-elasticsearch) - generates GraphQL types from elastic mappings; ElasticSearch REST API proxy via GraphQL.
* [graphql-compose-aws](https://github.com/graphql-compose/graphql-compose-aws) - expose AWS Cloud API via GraphQL
### Utility plugins:
* [graphql-compose-relay](https://github.com/graphql-compose/graphql-compose-relay) - reassemble GraphQL types with `Relay` specific things, like `Node` type and interface, `globalId`, `clientMutationId`.
* [graphql-compose-connection](https://github.com/graphql-compose/graphql-compose-connection) - generates `connection` Resolver from `findMany` and `count` Resolvers.
* [graphql-compose-dataloader](https://github.com/stoffern/graphql-compose-dataloader) - adds DataLoader to graphql-composer resolvers.
## Documentation
[graphql-compose.github.io](https://graphql-compose.github.io/)
## Live Demos
* [graphql-compose.herokuapp.com](https://graphql-compose.herokuapp.com/) - Live demo of GraphQL Server (9 models, 14 files, ~750 LOC)
* [nodkz.github.io/relay-northwind](https://nodkz.github.io/relay-northwind) - Live demo of Relay client working with the server above (8 crazy pages, 47 files, ~3000 LOC)
## Examples
Please follow [Quick Start Guide](https://graphql-compose.github.io/docs/intro/quick-start.html) for the complete example.
Here is just a demo of ambiguity ways of types definitions:
```js
import { schemaComposer} from 'graphql-compose';
// You may use SDL format for type definition
const CityTC = schemaComposer.createObjectTC(`
type City {
code: String!
name: String!
population: Number
countryCode: String
tz: String
}
`);
// Define type via Config object
const CountryTC = schemaComposer.createObjectTC({
name: 'Country',
fields: {
title: 'String',
geo: `type LonLat { lon: Float, lat: Float }`,
hoisting: {
type: () => AnotherTC,
description: `
You may wrap type in thunk for solving
hoisting problems when two types cross reference
each other.
`,
}
}
});
// Or via declarative methods define some additional fields
CityTC.addFields({
country: CountryTC, // some another Type
ucName: { // standard GraphQL like field definition
type: GraphQLString,
resolve: (source) => source.name.toUpperCase(),
},
currentLocalTime: { // extended GraphQL Compose field definition
type: 'Date',
resolve: (source) => moment().tz(source.tz).format(),
projection: { tz: true }, // load `tz` from database, when requested only `localTime` field
},
counter: 'Int', // shortening for only type definition for field
complex: `type ComplexType {
subField1: String
subField2: Float
subField3: Boolean
subField4: ID
subField5: JSON
subField6: Date
}`,
list0: {
type: '[String]',
description: 'Array of strings',
},
list1: '[String]',
list2: ['String'],
list3: [new GraphQLOutputType(...)],
list4: [`type Complex2Type { f1: Float, f2: Int }`],
});
// Add resolver method
CityTC.addResolver({
kind: 'query',
name: 'findMany',
args: {
filter: `input CityFilterInput {
code: String!
}`,
limit: {
type: 'Int',
defaultValue: 20,
},
skip: 'Int',
// ... other args if needed
},
type: [CityTC], // array of cities
resolve: async ({ args, context }) => {
return context.someCityDB
.findMany(args.filter)
.limit(args.limit)
.skip(args.skip);
},
});
// Remove `tz` field from schema
CityTC.removeField('tz');
// Add description to field
CityTC.extendField('name', {
description: 'City name',
});
schemaComposer.Query.addFields({
cities: CityTC.getResolver('findMany'),
currentTime: {
type: 'Date',
resolve: () => Date.now(),
},
});
schemaComposer.Mutation.addFields({
createCity: CityTC.getResolver('createOne'),
updateCity: CityTC.getResolver('updateById'),
...adminAccess({
removeCity: CityTC.getResolver('removeById'),
}),
});
function adminAccess(resolvers) {
Object.keys(resolvers).forEach(k => {
resolvers[k] = resolvers[k].wrapResolve(next => rp => {
// rp = resolveParams = { source, args, context, info }
if (!rp.context.isAdmin) {
throw new Error('You should be admin, to have access to this action.');
}
return next(rp);
});
});
return resolvers;
}
// construct schema which can be passed to express-graphql, apollo-server or graphql-yoga
export const schema = schemaComposer.buildSchema();
```
## Contributors
This project exists thanks to all the people who contribute.
## Backers
Thank you to all our backers! 🙏 [[Become a backer](https://opencollective.com/graphql-compose#backer)]
## Sponsors
Support this project by becoming a sponsor. Your logo will show up here with a link to your website. [[Become a sponsor](https://opencollective.com/graphql-compose#sponsor)]
## License
[MIT](https://github.com/graphql-compose/graphql-compose/blob/master/LICENSE.md)