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# GraphQL Demo Foxx Service
This is a GraphQL demo service for ArangoDB 3.1 and higher
using the [graphql-sync wrapper for graphql-js](https://github.com/arangodb/graphql-sync)
and the [Foxx GraphQL extensions for ArangoDB](https://docs.arangodb.com/3.1/Manual/Foxx/GraphQL.html).
This service implements two API endpoints:
`POST /graphql`
and
`GET /graphql`
The endpoint accepts well-formed GraphQL queries based on the
GraphQL Star Wars data set, e.g.:
```graphql
{
hero(episode: "NewHope") {
name
friends(species: DROID) {
name
}
}
}
```
returns:
```json
{
"data": {
"hero": {
"name": "Luke Skywalker",
"friends": [
{
"name": "C-3PO"
},
{
"name": "R2-D2"
}
]
}
}
}
```
The request body can also be a JSON object with a `query` attribute.
Open the endpoint in the browser to explore the data set and schema using [the GraphiQL explorer](https://github.com/graphql/graphiql).
To learn more about GraphQL see [the official GraphQL spec](https://facebook.github.io/graphql/) and the [official introductory blog post](https://code.facebook.com/posts/1691455094417024/graphql-a-data-query-language/).
Check the file `schema.js` to see how GraphQL schemas can be given access to
ArangoDB collections. Check the files in the `test` folder to see examples of
GraphQL queries and their results.
# License
This demo service is licensed under the Apache 2.0 license.
The demo data set and test cases are based on the test fixtures and test suites
of the [graphql-js](https://github.com/graphql/graphql-js) project and used under
the BSD license and Facebook patent grant.
overwrite: true
schema: "./graphql/schema.graphql"
# documents: null
generates:
src/gql/types.ts:
plugins:
- "typescript"
- "typescript-resolvers"
# - "typescript-mongodb"
- "typescript-document-nodes"
config:
contextType: ./#Context
rootValueType: ./#RootValue
avoidOptionals: true
nonOptionalTypename: true
skipTypename: false
# mappers:
# User: UserDbObject
src/gql/graphql.schema.json:
plugins:
- "introspection"
# directive @auth(for: Role) on FIELD_DEFINITION | OBJECT
directive @graphEntry on FIELD_DEFINITION
interface Glyph {
_id(id: ID): ID!
}
input StringMatch {
eq: String
}
input PageArg {
limit: Int
after: ID
}
union Knower = User
union Knowable = User
type Knows implements Glyph {
_id(id: ID): ID!
_subj(id: ID): Knower!
_obj(id: ID): Knowable!
}
# union Follower = User
# union Followable = User
# type Follows {
# _id: ID!
# _kind: GlyphKind!
# subj: Follower!
# obj: Followable!
# }
union UserRelation = Knows #|Follows
type User implements Glyph {
_id(id: ID): ID!
_rel(page: PageArg): [UserRelation!]!
username(match: StringMatch): String!
}
type Query {
users: User @graphEntry
}
input UserInput {
username: String!
}
type Mutation {
createUser(user: UserInput!): User!
}
enum Role {
Anonymous
Admin
System
WebUser
}
type Auth {
userId: ID!
token: String!
roles: [Role!]!
}
{
"name": "demo-graphql",
"version": "0.1",
"description": "GraphQL Foxx Demo",
"engines": {
"arangodb": "^3.1.0"
},
"author": "alec",
"license": "Apache 2",
"main": "js/index.js",
"scripts": {
"setup": "scripts/setup.js",
"teardown": "scripts/teardown.js"
}
}
{
"name": "@moodlenet/backend",
"version": "1.0.0",
"main": "index.js",
"author": "aleclofabbro <alessandro.giansanti@gmail.com>",
"license": "MIT",
"dependencies": {
"@types/cors": "^2.8.7",
"@types/express": "^4.17.8",
"@types/graphql": "^14.5.0",
"@types/joi": "^14.3.4",
"@types/mongodb": "^3.5.27",
"@types/node": "^14.11.1",
"apollo-server": "^2.18.1",
"apollo-server-express": "^2.18.1",
"axios": "^0.20.0",
"cors": "^2.8.5",
"cypher-parser": "^0.1.4",
"express": "^4.17.1",
"express-graphql": "^0.11.0",
"graphql": "^15.3.0",
"graphql-middleware": "^4.0.2",
"graphql-tools": "^6.2.3",
"mongodb": "^3.6.2",
"neo4j-graphql-js": "^2.16.3",
"typescript": "^4.0.3",
"winston": "^3.3.3"
},
"devDependencies": {
"@graphql-codegen/cli": "1.17.8",
"@graphql-codegen/introspection": "^1.17.8",
"@graphql-codegen/typescript": "1.17.8",
"@graphql-codegen/typescript-document-nodes": "1.17.8",
"@graphql-codegen/typescript-mongodb": "1.17.8",
"@graphql-codegen/typescript-resolvers": "1.17.8"
},
"scripts": {
"codegen": "graphql-codegen --config graphql/codegen.yml",
"start": "node js/index.js",
"startmon": "nodemon -w js -w js/ -w graphql/schema.graphql js/index.js",
"startmoninspect": "nodemon --inspect -w js -w js/ -w graphql/schema.graphql js/index.js"
}
}
import { inspect } from 'util'
export const debug = (tag: string, obj: any, opts: { depth: number } = { depth: 1 }) => {
console.log(`\n`)
console.log(`________ ${tag} ________`)
console.log(inspect(obj, false, opts.depth, true))
console.log(`^^^^^^^^ ${tag} ^^^^^^^^`)
console.log(`\n`)
}
import { readFileSync } from 'fs'
import { parse } from 'graphql'
const _env = process.env
export const typeDefs = readFileSync(`${__dirname}/../graphql/schema.graphql`, 'utf-8')
export const mongoUrl = _env.MONGO_URL || 'mongodb://localhost:27017/mn'
export const httpPort = Number(_env.HTTP_PORT || 4001)
export const logLevel = _env.LOG_LEVEL || 'silly'
import { graphql, GraphQLSchema } from 'graphql'
import { inspect } from 'util'
import { DirectiveResolvers } from '../types'
export const graphEntry: DirectiveResolvers['graphEntry'] = async (
next,
parent,
args,
context,
info
) => {
context.skipNonNullValueChecks = true
const result = await next()
log('graphEntry Result', result)
return result
}
const log = (..._: any[]) => console.log(inspect(_, false, 6, true))
import { DirectiveResolvers } from '../types'
import { graphEntry } from './graphEntry'
export const directiveResolvers: DirectiveResolvers = {
graphEntry,
}
This diff is collapsed.
import { DIRECTIVES } from '@graphql-codegen/typescript-mongodb'
import { makeExecutableSchema } from 'apollo-server-express'
import { typeDefs } from '../env'
import { applyMiddleware } from 'graphql-middleware'
import { resolvers } from './resolvers'
import { directiveResolvers } from './directives'
import { middlewares } from './middlewares'
export type Context = {
skipNonNullValueChecks?: boolean
}
export type RootValue = {}
export const _schema = makeExecutableSchema<Context>({
typeDefs: [DIRECTIVES, typeDefs],
resolvers: resolvers as any,
directiveResolvers,
})
export const schema = applyMiddleware(_schema, ...middlewares)
export const middlewares = []
import { Resolvers } from '../types'
import { Mutation } from './mutation'
import { Query } from './query'
import { Types } from './types'
export const resolvers: Resolvers = {
Query,
Mutation,
...Types,
} as Resolvers
import { collection } from '../../../mongo/collection'
import { toMongoNode } from '../../../mongo/helpers/conversions'
import { MutationResolvers, User } from '../../types'
export const createUser: MutationResolvers['createUser'] = async (parent, args, context, info) => {
const newUser = toMongoNode<User>({
__typename: 'User',
username: args.user.username,
})
const c = await collection<User>('User')
await c.insertOne(newUser)
return { ...newUser, _id: newUser._id.toHexString(), _rel: [] as any[] }
}
import { MutationResolvers } from '../../types'
import { createUser } from './createUser'
export const Mutation: MutationResolvers = {
createUser,
}
import { GraphQLList } from 'graphql'
import { ObjectID } from 'mongodb'
import { QueryResolvers, ResolverFn, Query as QueryType } from '../../types'
export const Query: QueryResolvers = {
users: defaultGraphEntry<'users'>('User'),
}
type BaseQueryType<QN extends keyof QueryType> = Exclude<
QueryType[QN] extends Array<infer AT> ? AT : QueryType[QN],
null | undefined | void
>
function defaultGraphEntry<
QN extends keyof QueryType,
T extends { __typename: string } = BaseQueryType<QN> & { __typename: string }
>(__typename: T['__typename']) {
return (/* parent, args, context, info */) => {
return {
__typename,
} as any
}
}
import { GraphQLFieldResolver } from 'graphql'
import { ResolverFn, Resolvers, TypeResolveFn } from '../../types'
export const Types = {
User: {
_id: defaultFieldResolver(),
_rel: defaultFieldResolver(),
username: defaultFieldResolver(),
},
Knows: {
_id: defaultFieldResolver(),
_subj: defaultFieldResolver(),
_obj: defaultFieldResolver(),
},
}
function defaultFieldResolver(): ResolverFn<any, any, any, any> {
return (parent, args, context, { fieldName, parentType }) => {
console.log('defaultFieldResolver', parentType.name, fieldName)
if (parent.$types) {
parent.$types.add(parentType.name)
}
const base = {
$fieldName: fieldName,
$args: args,
}
if (['_rel', '_subj', '_rel'].includes(fieldName)) {
return {
...base,
$types: new Set(),
}
} else {
return base
}
}
}
import { GraphQLResolveInfo } from 'graphql';
import { Context, RootValue } from './';
import gql from 'graphql-tag';
export type Maybe<T> = T | null;
export type Exact<T extends { [key: string]: unknown }> = { [K in keyof T]: T[K] };
export type Omit<T, K extends keyof T> = Pick<T, Exclude<keyof T, K>>;
export type RequireFields<T, K extends keyof T> = { [X in Exclude<keyof T, K>]?: T[X] } & { [P in K]-?: NonNullable<T[P]> };
/** All built-in and custom scalars, mapped to their actual values */
export type Scalars = {
ID: string;
String: string;
Boolean: boolean;
Int: number;
Float: number;
};
export type Glyph = {
_id: Scalars['ID'];
};
export type Glyph_IdArgs = {
id: Maybe<Scalars['ID']>;
};
export type StringMatch = {
eq: Maybe<Scalars['String']>;
};