GraphQL Error field type must be Input Type but got:undefined

Question

Here is the mutation: const createNotebook = mutationWithClientMutationId ({ name: 'CreateNotebook', inputFields: { token: { type: GraphQLString, }, details: { type: NotebookDetails, }, }, outputFields: { }, async mutateCRNotebook(input, context) { const data = getJSONFromRelativeURL(input.token); }, }); Here is the schema used in the details field of the mutation: const NotebookDetails = new GraphQLObjectType({ name: 'NotebookDetails', interfaces: [nodeInterface], fields: () => ({ id: globalIdField('NotebookDetails'), description: { type: GraphQLString, description: '...', resolve(obj) { return obj.description; }, }, language: { type: GraphQLString, description: '...', resolve(obj) { return obj.language; }, }, }), }); Error I am getting on running this code is : api_1 | Error: CreateNotebookInput.details field type must be Input Type but got: NotebookDetails.

Snehal Kumar · Accepted Answer

In GraphQL, an input cannot be used as a type and a type cannot be used as an input. Unfortunately, even if the fields appear identical to an existing type, you always have to define a separate input to use as an argument. Try something like this: const NotebookDetailsInput = new GraphQLInputObjectType({ name: 'NotebookDetailsInput', fields: () => ({ id: { type: GraphQLID }, description: { type: GraphQLString }, language: { type: GraphQLString }, }) }); If using SDL, the same type would look like this: input { id: ID description: String language: String }

GraphQL

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