What is the best approach for fetching a refined selection of items from an array of IDs using GraphQL?

If I have a list of products stored in my database, it might look something like this

items: [
    {
        id: '001',
        name: 'Product 01',
        description: 'Awesome product'
        price: 50.00
    },
    {
        id: '002',
        name: 'Product 02',
        description: 'Awesome product'
        price: 50.00
    },
    {
        id: '003',
        title: 'Product 03',
        description: 'Awesome product'
        price: 50.00
    },
    {
        id: '004',
        name: 'Product 04',
        description: 'Awesome product'
        price: 50.00
    },
    {
        id: '005',
        name: 'Product 05',
        description: 'Awesome product'
        price: 50.00
    }
]

If I want GraphQL to only show me products 1, 3, and 4 by passing an array containing ['001', '003', '004'], which function should I implement on my schema to achieve this?

javascriptgraphql

Answer №1

To set up functionality for products, you will need to define a type for products, create a query definition, and implement a resolver.

Define the following in your schema:

type Product {
  id: ID!
  title: String!
  description: String!
  price: Float!
}

type Query {
  getProductsByID(ids: [ID!]!): [Product]
}

Next, include the resolver code:

getProductsById: ( _, { ids } ) => {
  // Write the necessary ORM code to fetch products based on their IDs
  // The `ids` variable will contain an array of IDs - which are essentially strings in this context
  return arrayOfProducts
}

The query getProductsById has been configured to accept a single input parameter named ids, which should be an array containing IDs.

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