graphql-composer-typeorm

graphql-composer-decorators

Create your GraphQL API using decorators!

graphql-composer-decorators

GraphQL comes to revolutionize backend development, the fact that you have to declare types is something very useful, however it can lead to code duplication and therefore affect the stability of your application. Indeed, based on the DRY (Don't Repeat Yourself) principle, the fact of declaring several times the same element in a different way should be avoided, because when this element changes it is necessary to modify several parts of code, so if only one of these parts is omitted it can cause problems in your application and the more it grows the harder it will be to maintain it.

Go to the documentation

graphql-composer

The graphql-composer-decorators module is broken down into two modules instead of making one heavier, graphql-composer simply provides a compositing API which allows you to create an API using the builder design pattern and compositing.

Documentation for this module will be available soon.

graphql-composer-typeorm

This solution offers a way to create advanced queries with TypeORM and graphql-composer-decorators

ArgsFactory

This class allows to generate complex arguments from a class, the arguments will be generated in order to be able to specify several parameters for certain types:

string

eq

strictly equal value

like

expression value

number

eq

strictly equal value

gt

strictly higher value

gte

greater or equal value

lt

strictly speaking, smaller value

lte

lesser or equal value

Parser

This class allows you to generate the SQL query via your arguments:

Example

const args = ArgsFactory.create(User)
 
@Resolver()
class Resolver {
  @Query()
  query(
    Args(args) args: KeyValue,
    ctx: Context
  ): Response {
    const query = parser.buildQuery(ctx);
    return query.getMany();
  }
}