Graphql-tools: Unable to add date scalar type

Created on 12 Nov 2016 · 4Comments · Source: ardatan/graphql-tools

I'm trying to add a Date scalar type as per the docs. But schema compilation throws an error.

http://dev.apollodata.com/tools/graphql-tools/scalars.html

Code

const rootSchema = [`

scalar Date

type User {
    id: String
    created: Date
}

type Query {
 removed to keep things terse 
}

schema {
  query: Query
}

`];

const rootResolvers = {
    Date: new GraphQLScalarType({
        name: 'Date',
        description: 'Date custom scalar type',
        parseValue(value) {
            return new Date(value); // value from the client
        },
        serialize(value) {
            return value.getTime(); // value sent to the client
        },
        parseLiteral(ast: any) {
            if (ast.kind === Kind.INT) {
                return parseInt(ast.value, 10); // ast value is always in string format
            }
            return null;
        },
    }),
    Query: {
    },
};

// Compose schemas / resolvers
    const schema = [...rootSchema];
const resolvers = Object.assign({}, rootResolvers);

// Create schema
const executableSchema = makeExecutableSchema({
    typeDefs: schema,
    resolvers,
});

export default executableSchema;

Error

/Users/Danijel/projects/am/am-api/node_modules/graphql-tools/dist/schemaGenerator.js:224
[1]                 throw new SchemaError(typeName + " was defined in resolvers, but it's not an object");
[1]                 ^
[1] Error: Date was defined in resolvers, but it's not an object
[1]     at /Users/Danijel/projects/am/am-api/node_modules/graphql-tools/dist/schemaGenerator.js:224:23
[1]     at Array.forEach (native)
[1]     at /Users/Danijel/projects/am/am-api/node_modules/graphql-tools/dist/schemaGenerator.js:215:49
[1]     at Array.forEach (native)
[1]     at addResolveFunctionsToSchema (/Users/Danijel/projects/am/am-api/node_modules/graphql-tools/dist/schemaGenerator.js:210:35)
[1]     at _generateSchema (/Users/Danijel/projects/am/am-api/node_modules/graphql-tools/dist/schemaGenerator.js:44:5)
[1]     at Object.makeExecutableSchema (/Users/Danijel/projects/am/am-api/node_modules/graphql-tools/dist/schemaGenerator.js:56:20)
[1]     at Object.<anonymous> (/Users/Danijel/projects/am/am-api/lib/graphQL/schema.js:208:42)
[1]     at Module._compile (module.js:556:32)
[1]     at Object.Module._extensions..js (module.js:565:10)
[1]     at Module.load (module.js:473:32)
[1]     at tryModuleLoad (module.js:432:12)
[1]     at Function.Module._load (module.js:424:3)
[1]     at Module.require (module.js:483:17)
[1]     at require (internal/module.js:20:19)
[1]     at Object.<anonymous> (/Users/Danijel/projects/am/am-api/lib/router.js:5:18)

Source