GraphQL — Schema و Resolvers

type User {
  id: ID!
  name: String!
  email: String
  posts: [Post!]!
}

type Query {
  users: [User!]!
  user(id: ID!): User
}

const resolvers = {
  Query: {
    users: () => {
      return db.findMany('users');
    },
    user: (parent, args, context, info) => {
      return db.findOne('users', { id: args.id });
    },
  },
};

type Query {
  searchUsers(query: String!, limit: Int = 10): [User!]!
}

searchUsers: (_, { query, limit }) => {
  return db.search('users', { query, limit });
},

type User {
  id: ID!
  name: String!
  posts: [Post!]!
}

type Post {
  id: ID!
  title: String!
  author: User!
}

const resolvers = {
  User: {
    posts: (user) => {
      return db.findMany('posts', { authorId: user.id });
    },
  },
  Post: {
    author: (post) => {
      return db.findOne('users', { id: post.authorId });
    },
  },
};

const server = new ApolloServer({
  typeDefs,
  resolvers,
  context: ({ req }) => ({
    user: getUserFromToken(req.headers.authorization),
    db,
  }),
});

// داخل Resolver
Query: {
  me: (_, __, { user, db }) => {
    if (!user) throw new Error('Unauthorized');
    return db.findOne('users', { id: user.id });
  },
},