GraphQL-yoga 간단한 실습2

2022-02-12 1 분 소요

실습해보기2

mutation을 사용해보자

graphql/schema.graphql

type Movie {
  id: Int!
  name: String!
  score: Int!
}

type Query {
  movies: [Movie]!
  movie(id: Int!): Movie
}

type Mutation {
  addMovie(name: String!, score: Int!): Movie!
  deleteMovie(id: Int!): Boolean!
}

graphql/resolvers.js

let movies = [
  { id: 0, name: '하울의 움직이는 성', score: 3 },
  { id: 1, name: '백설공주', score: 8 },
  { id: 2, name: '빨간머리 앤', score: 99 },
  { id: 3, name: '인어공주', score: 2 },
];

const getMovies = () => movies;
const getById = (id) => {
  const filterMovies = movies.filter((movie) => (movie.id = id));
  return filterMovies[0];
};
const deleteMovie = (id) => {
  const cleanedMovies = movies.filter((movie) => movie.id !== id);
  if (movies.length > cleanedMovies.length) {
    movies = cleanedMovies;
    return true;
  } else {
    return false;
  }
};
const addMovie = (name, score) => {
  const newMovie = {
    id: movies.length + 1,
    name,
    score,
  };
  movies.push(newMovie);
  return newMovie;
};

const resolvers = {
  Query: {
    movies: () => getMovies(),
    movie: (_, { id }) => getById(id),
  },
  Mutation: {
    addMovie: (_, { name, score }) => addMovie(name, score),
    deleteMovie: (_, { id }) => deleteMovie(id),
  },
};

export default resolvers;