Understanding the error given by Typescript is crucial. It is trying to say when your code expects something of A type, you are giving it something of B type. One of the easiest way to solve this issue is by matching the type of the incoming object with the type of the your defined/expected object.

There are several ways to achieve this solution. One, of the way is to make a helper function to convert your output into desired output.

//helper function to convert from string type to GraphQLCode type
function toGraphQLCode(value: string): GraphQLCode {
  const enumValues = Object.values(GraphQLCode).filter((v) => typeof v === "string");
  if (enumValues.includes(value)) {
    return value as GraphQLCode; 
  }
  throw new Error(`Invalid GraphQLCode value: ${value}`);
}

interface MyArrayItem {
  code: GraphQLCode;
  // ...other fields
}

const myArray: MyArrayItem[] = [];

// codeMapper that returns strings that matches enum values
const codeMapper = {
  someKey: "SOME_VALUES",
  // Add other mappings....
} as const;

// Example usage in your resolver or logic
const code = "someKey"; // Your logic/input
myArray.push({
  code: toGraphQLCode(codeMapper[code as keyof typeof codeMapper]),
  // ...other fields
});

// Example resolver (if this is part of a GraphQL resolver)
const resolvers = {
  Query: {
    myResolver: () => {
      const myArray: MyArrayItem[] = [];
      const code = "someKey";
      myArray.push({
        code: toGraphQLCode(codeMapper[code as keyof typeof codeMapper]),
        // ...other fields
      });
      return myArray;
    },
  },
};

I guess this sample code should help you out. Pls let me know if the error still exists. We can debug further!