问存储库模式-- node.js中的实际用例及实现

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// userRepository.js
const userDb = [];

module.exports = {
  insert: async (user) => userDb.push(user),
  findAll: async () => userDb,
};

// userRepository.js
const userDb = new Map();

module.exports = Object.freeze({
  findById: async (id) => userDb.get(id),
  insert: async (user) => userDb.set(user.id, user),
  findAll: async () => Array.from(userDb.values()),
  removeById: async (id) => userDb.delete(id),
  update: async (updatedUser) => {
    if (!userDb.has(updatedUser.id)) throw new Error('user not found');
    userDb.set(updatedUser.id, { ...userDb.get(updatedUser.id), ...updatedUser });
  },
});