Mastering Typescript Inversify: The Ultimate Guide to Binding Interfaces with Type Parameters

I am trying to figure out how to bind an interface with a type parameter, but I am unsure of the correct way to do it.

Here is the Interface:

...
export interface ITestHelper<Entity extends ObjectLiteral> {
  doSomething(builder: SelectQueryBuilder<Entity>,
    pagination: IPaginationParams): SelectQueryBuilder<Entity>;
}
export const TTestHelper = Symbol.for('ITestHelper');

ContainerModule Issue:

I attempted to bind as shown below, but I encountered an error stating 'Generic type 'ITestHelper' requires 1 type argument(s)'

...
export const TestContainerModule = new ContainerModule((bind: interfaces.Bind) => {
    bind<ITestHelper>(TTestHelper)
    .to(TestHelper)
    .inSingletonScope();
});

Answer №1

I believe I have figured it out. I made a modification to the binding:

...
export const UpdatedContainerModule = new ContainerModule((bind: interfaces.Bind) => {
    bind<ITestHelper<ObjectLiteral>>(TTestHelper)
    .to(TestHelper)
    .inSingletonScope();
});

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