Feathers Typescript

[EmileSpecs]

Hi @idaho

Used the CLI to build a TypeScript FeatherJs app.

I can't get feathers-async-boot to work with it! I tried import but that gives a myriad of errors, but also requiring the module gives errors.

Would you mind having a look and seeing how I can get this to work with the TypeScript version?

[idaho]

Hi @EmileSpecs can you post the error you got and code example .

[EmileSpecs]

Hi @idaho Using the project generated by the Feathers CLI (choosing TypeScript) and simply adding this to app.ts.

import boot from 'feathers-async-boot';
app.configure(boot);
app.bootstrap([objection]);

The objection config file's function looks as follows:

import { Model } from 'objection';
import knex from 'knex';
import { Application } from './declarations';

export default async function (app: Application): Promise<any> {
  const { client, connection } = app.get('postgres');
  const db = knex({ client, connection, useNullAsDefault: false });
  await db.raw('CREATE EXTENSION IF NOT EXISTS pgcrypto');
  Model.knex(db);
  app.set('knex', db);
}

boot gives this error: Argument of type 'typeof import("/node_modules/feathers-async-boot/index")' is not assignable to parameter of type '(this: Application<ServiceTypes>, app: Application<ServiceTypes>) => void'. Type 'typeof import("/node_modules/feathers-async-boot/index")' provides no match for the signature '(this: Application<ServiceTypes>, app: Application<ServiceTypes>): void'.ts(2345)

app.bootstrap([objection]); gives this error: No overload matches this call. Overload 1 of 2, '(addModulesToBoot: BootModule[]): void', gave the following error. Type '(app: Application<ServiceTypes>) => Promise<any>' is not assignable to type 'BootModule'. Types of parameters 'app' and 'app' are incompatible. Type 'Application<{}> | undefined' is not assignable to type 'Application<ServiceTypes>'. Type 'undefined' is not assignable to type 'Application<ServiceTypes>'. Type 'undefined' is not assignable to type 'Express'. Overload 2 of 2, '(addModuleToBoot: BootModule): void', gave the following error. Argument of type '((app: Application<ServiceTypes>) => Promise<any>)[]' is not assignable to parameter of type 'BootModule'. Type '((app: Application<ServiceTypes>) => Promise<any>)[]' provides no match for the signature '(app?: Application<{}> | undefined): Promise<any>'.ts(2769)

I'm new to TypeScript so I'm not quite sure how to resolve this. To me one problem seems that the Application type definition differs.

feathers-async-boot uses the Application type "as is" as in index.d.ts:

import { Application } from '@feathersjs/feathers';

Feathers defines it like this in declarations.d.ts:

import { Application as ExpressFeathers } from '@feathersjs/express';

// A mapping of service names to types. Will be extended in service files.
export interface ServiceTypes {}
// The application instance type that will be used everywhere else
export type Application = ExpressFeathers<ServiceTypes>;

If this is the core issue, should feathers-async-boot not use the Application as defined by Feathers app somehow?