medium_graphql_schema_gist_05.js

// src/graphql/product/schema.graphql

type Product {
  id: ID!
  name: String!
  shortDescription: String
}

type Query {
  # ### GET products
  #
  # _Arguments_
  # - **id**: Product id (optional)
  products(id: Int): [Product]
}

medium_graphql_schema_gist_06.js

// src/graphql/product/resolver.js

const productMocks = [{ id: 1, name: 'Product A', shortDescription: 'First product.' }, { id: 2, name: 'Product B', shortDescription: 'Second product.' }]

exports.resolver = {
    Query: {
        products(root, { id }, context) {
          const results = id ? productMocks.filter(p => p.id == id) : productMocks
          if (results.length > 0)
            return results
          else
            throw new Error(`Product with id ${id} does not exist.`)
        }
    }
}

medium_graphql_schema_gist_07.js

// src/graphql/variant/schema.graphql

type Variant {
  id: ID!
  name: String!
  shortDescription: String
}

type Query {
  # ### GET variants
  #
  # _Arguments_
  # - **id**: Variant id (optional)
  variants(id: Int): [Variant]
}

medium_graphql_schema_gist_08.js

// src/graphql/variant/resolver.js

const variantMocks = [{ id: 1, name: 'Variant A', shortDescription: 'First variant.' }, { id: 2, name: 'Variant B', shortDescription: 'Second variant.' }]

exports.resolver = {
    Query: {
        variants(root, { id }, context) {
          const results = id ? variantMocks.filter(p => p.id == id) : variantMocks
          if (results.length > 0)
            return results
          else
            throw new Error(`Variant with id ${id} does not exist.`)
        }
    }
}

medium_graphql_schema_gist_09.js

// index.js

const { app } = require('webfunc')
const { graphqlHandler } = require('graphql-serverless')
const { makeExecutableSchema } = require('graphql-tools')
const glue = require('schemaglue')

const { schema, resolver } = glue('src/graphql')
const executableSchema = makeExecutableSchema({
    typeDefs: schema,
    resolvers: resolver
})

const graphqlOptions = {
    schema: executableSchema,
    graphiql: {
    	endpoint: '/graphiql'
    }
}

app.all(['/', '/graphiql'], graphqlHandler(graphqlOptions))
app.listen(4000)