Angular 10 Swagger Codegen: Generic type ModuleWithProviders<T> requires 1 type argument(s)

this error tells you that, the ModuleWithProviders class has 1 generic paramter. so you sould use it like ModuleWithProviders<T> where T is a type.

EDIT:

The class is defined like this:

interface ModuleWithProviders<T> {
  ngModule: Type<T>
  providers?: Provider[]
}

.

export class ApiModule {
  public static forRoot(configurationFactory: () => Configuration) : ModuleWithProviders<ApiModule> {
    return {
        ngModule: ApiModule,
        providers: [ { provide: Configuration, useFactory: configurationFactory } ]
    };
}

See Resource:

https://angular.io/guide/migration-module-with-providers

We stumbled over the same issue. Luckily you can provide custom *.mustache templates to the swagger-codegen-cli using the -t switch (see the swagger doc).

Our adapted api.module.mustache looks like this:

import { NgModule, ModuleWithProviders, SkipSelf, Optional } from '@angular/core';
import { Configuration } from './configuration';
{{#useHttpClient}}import { HttpClient } from '@angular/common/http';{{/useHttpClient}}
{{^useHttpClient}}import { Http } from '@angular/http';{{/useHttpClient}}

{{#apiInfo}}
{{#apis}}
import { {{classname}} } from './{{importPath}}';
{{/apis}}
{{/apiInfo}}

@NgModule({
  imports:      [],
  declarations: [],
  exports:      [],
  providers: [
    {{#apiInfo}}{{#apis}}{{classname}}{{#hasMore}},
    {{/hasMore}}{{/apis}}{{/apiInfo}} ]
})
export class ApiModule {
    public static forRoot(configurationFactory: () => Configuration): ModuleWithProviders<ApiModule> {
        return {
            ngModule: ApiModule,
            providers: [ { provide: Configuration, useFactory: configurationFactory } ]
        };
    }

    constructor( @Optional() @SkipSelf() parentModule: ApiModule,
                 @Optional() http: {{#useHttpClient}}HttpClient{{/useHttpClient}}{{^useHttpClient}}Http{{/useHttpClient}}) {
        if (parentModule) {
            throw new Error('ApiModule is already loaded. Import in your base AppModule only.');
        }
        if (!http) {
            throw new Error('You need to import the {{#useHttpClient}}HttpClientModule{{/useHttpClient}}{{^useHttpClient}}HttpModule{{/useHttpClient}} in your AppModule! \n' +
            'See also https://github.com/angular/angular/issues/20575');
        }
    }
}

The only change needed is to replace ModuleWithProviders by ModuleWithProviders<ApiModule>. Afterwards the generated api.module.ts will work with Angular 10.