Object mutations in graphQL

Question

Here is my EventAttendee Object.

const EventAttendee = new GraphQLInputObjectType({
  name: 'EventAttendee',
  fields: () => ({
    attendeeName: {type: GraphQLString},
    personalizedDateSelection: {type: new GraphQLInputObjectType()}
  })
});

The personalizedDateSelection property is an dynamic one and its properties are not known now. So, In this case, I have given GraphQLInputObjectType().

But it gives an error stating EventAttendee.personalizedDateSelection field type must be Output Type.

How to define an ObjectType whose properties are not known ?

Answer 1

I wanted personalizedDateSelection property of EventAttendee to be of objectType but I dont know those properties in advance, but I am sure that it is of Object type.

So declaring this as GraphQLScalarType was the correct way to do it. Check out about GraphQLScalarType. But we need to create a custom scalar type. All scalar types can be of input type. So here is my implementation:

const PersonalizedDateSelection = new GraphQLScalarType({
    name: 'PersonalizedDateSelection',
    serialize: value => {
      return value;
    },
    parseValue: value => {
      return value;
    },
    parseLiteral: ast => {
      console.log("coming in parseLiteral");
      console.log(ast);
      let value = {};
      if (ast.kind !== Kind.OBJECT) {
        throw new GraphQLError("Query error: Can only parse object but got a: " + ast.kind, [ast]);
      }
      ast.fields.forEach(field => {
        value[field.name.value] = parseJSONLiteral(field.value);
      });

      return value;
    }
});