我在 graphql javascript 中遇到突变查询问题

Question

I try this type of mutation but I didn't get a proper response please help me to solve that.

mutation: new GraphQLObjectType({
  name: "Mutation",
  fields: {
    createProduct: {
      type: new GraphQLNonNull(productType),
      args: {
        products: { type: new GraphQLNonNull(productInput) }
      },
      resolve: (_, products) => {
        let pro = products;
        console.log("pro", pro);

        return products.push(pro);
      }
    }
  }
});

Answer 1

You probably want to keep the products in memory inside of an array of products. There are two things wrong in your code. First, the second argument of the resolver returns an object of arguments because a field can have multiple arguments. You can either destructure the arguments or use the normal object access syntax. Second, Array.prototype.push returns the new lenght of the array . Therefore, you can't return the result of this call (your product type most likely expects a product as a root value). Return product instead. Also you are pushing into the argument. Maybe you have a name conflict there. I would recommend to use singular for arguments and variables that are not arrays, lists, or sets.

let products = [];

const schema = new GraphQLSchema({
  query: _,
  mutation: new GraphQLObjectType({
    name: "Mutation",
    fields: {
      createProduct: {
        type: new GraphQLNonNull(productType),
        args: {
          product: { type: new GraphQLNonNull(productInput) }
        },
        resolve: (_, args) => {
          console.log("pro", args.product);

          products.push(args.product);
          return args.product;
        }
      }
    }
  }),
});