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I am trying to get my data service to accommodate route parameters.

  @Injectable({
    providedIn: 'root'
  })
  export class DataService implements InMemoryDbService {
  
  createDb(): {
    products: IProducts[],
    product: IProduct
  } {
    const products = ProductsData.products;
    const product = ProductsData.product;

    return { products, product };
  }
}

When I'm executing a route like products/123 I want the system to get the product collection. I've tried different approaches using the environment file and the product collection within the products-data.ts file, but I'm not having any luck. Are there examples available? For that matter, how should the data service be configured to accommodate query strings?

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The property of the object you want to filter will be the key of the query string.

api/heroes/?name=${term}

Here we filter name of the object { id: 0, name: 'Zero' }.

Just search for "tour of heroes stackblitz" to get wide range of examples for you to use as reference.

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Ok, I have succeeded in filtering based on a route parameter that matches a record ID. Two questions remain: 1) can a record ID be itemId or does if have to be just id, and 2) can query parameters be used to filter on a range, like all the records between a given from and to date?

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