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Я установил MongoDB с

 brew install mongodb-community@5.0  

Я начал MongoDB с

 brew services start mongodb-community@5.0  

дальше brew services list я получаю:

 Name Status User File emacs stopped mongodb-community started laurenz ~/Library/LaunchAgents/homebrew.mxcl.mongodb-community.plist unbound stopped  

На моем экспресс-сервере я использовал этот код для подключения к MongoDB:

 connectToServer: function (callback) {  mongoose.connect('mongodb://localhost/test', { useNewUrlParser: true }); const db = mongoose.connection db.on('error', (error) =gt; {   console.error(error)  callback(error) })  

}

При открытии MongoDB Compass я могу подключиться к MongoDB, а также увидеть свою таблицу. Тот же код отлично работает на моем Intel iMac.

Это ошибка, которую я получаю при запуске моего server.js:

 MongooseServerSelectionError: connect ECONNREFUSED ::1:27017  at NativeConnection.Connection.openUri (/Users/laurenz/uni_workspace/omm-project-ws2122/be/node_modules/mongoose/lib/connection.js:797:32)  at /Users/laurenz/uni_workspace/omm-project-ws2122/be/node_modules/mongoose/lib/index.js:332:10  at /Users/laurenz/uni_workspace/omm-project-ws2122/be/node_modules/mongoose/lib/helpers/promiseOrCallback.js:32:5  at new Promise (lt;anonymousgt;)  at promiseOrCallback (/Users/laurenz/uni_workspace/omm-project-ws2122/be/node_modules/mongoose/lib/helpers/promiseOrCallback.js:31:10)  at Mongoose._promiseOrCallback (/Users/laurenz/uni_workspace/omm-project-ws2122/be/node_modules/mongoose/lib/index.js:1153:10)  at Mongoose.connect (/Users/laurenz/uni_workspace/omm-project-ws2122/be/node_modules/mongoose/lib/index.js:331:20)  at Object.connectToServer (/Users/laurenz/uni_workspace/omm-project-ws2122/be/db/conn.js:16:14)  at Server.lt;anonymousgt; (/Users/laurenz/uni_workspace/omm-project-ws2122/be/server.js:16:7)  at Object.onceWrapper (node:events:509:28) {  reason: TopologyDescription {  type: 'Unknown',  servers: Map(1) { 'localhost:27017' =gt; [ServerDescription] },  stale: false,  compatible: true,  heartbeatFrequencyMS: 10000,  localThresholdMS: 15,  logicalSessionTimeoutMinutes: undefined  } } MongooseServerSelectionError: connect ECONNREFUSED ::1:27017  at NativeConnection.Connection.openUri (/Users/laurenz/uni_workspace/omm-project-ws2122/be/node_modules/mongoose/lib/connection.js:797:32)  at /Users/laurenz/uni_workspace/omm-project-ws2122/be/node_modules/mongoose/lib/index.js:332:10  at /Users/laurenz/uni_workspace/omm-project-ws2122/be/node_modules/mongoose/lib/helpers/promiseOrCallback.js:32:5  at new Promise (lt;anonymousgt;)  at promiseOrCallback (/Users/laurenz/uni_workspace/omm-project-ws2122/be/node_modules/mongoose/lib/helpers/promiseOrCallback.js:31:10)  at Mongoose._promiseOrCallback (/Users/laurenz/uni_workspace/omm-project-ws2122/be/node_modules/mongoose/lib/index.js:1153:10)  at Mongoose.connect (/Users/laurenz/uni_workspace/omm-project-ws2122/be/node_modules/mongoose/lib/index.js:331:20)  at Object.connectToServer (/Users/laurenz/uni_workspace/omm-project-ws2122/be/db/conn.js:16:14)  at Server.lt;anonymousgt; (/Users/laurenz/uni_workspace/omm-project-ws2122/be/server.js:16:7)  at Object.onceWrapper (node:events:509:28) {  reason: TopologyDescription {  type: 'Unknown',  servers: Map(1) { 'localhost:27017' =gt; [ServerDescription] },  stale: false,  compatible: true,  heartbeatFrequencyMS: 10000,  localThresholdMS: 15,  logicalSessionTimeoutMinutes: undefined  } } node:internal/process/promises:246  triggerUncaughtException(err, true /* fromPromise */);  ^  MongooseServerSelectionError: connect ECONNREFUSED ::1:27017  at NativeConnection.Connection.openUri (/Users/laurenz/uni_workspace/omm-project-ws2122/be/node_modules/mongoose/lib/connection.js:797:32)  at /Users/laurenz/uni_workspace/omm-project-ws2122/be/node_modules/mongoose/lib/index.js:332:10  at /Users/laurenz/uni_workspace/omm-project-ws2122/be/node_modules/mongoose/lib/helpers/promiseOrCallback.js:32:5  at new Promise (lt;anonymousgt;)  at promiseOrCallback (/Users/laurenz/uni_workspace/omm-project-ws2122/be/node_modules/mongoose/lib/helpers/promiseOrCallback.js:31:10)  at Mongoose._promiseOrCallback (/Users/laurenz/uni_workspace/omm-project-ws2122/be/node_modules/mongoose/lib/index.js:1153:10)  at Mongoose.connect (/Users/laurenz/uni_workspace/omm-project-ws2122/be/node_modules/mongoose/lib/index.js:331:20)  at Object.connectToServer (/Users/laurenz/uni_workspace/omm-project-ws2122/be/db/conn.js:16:14)  at Server.lt;anonymousgt; (/Users/laurenz/uni_workspace/omm-project-ws2122/be/server.js:16:7)  at Object.onceWrapper (node:events:509:28) {  reason: TopologyDescription {  type: 'Unknown',  servers: Map(1) {  'localhost:27017' =gt; ServerDescription {  _hostAddress: HostAddress { isIPv6: false, host: 'localhost', port: 27017 },  address: 'localhost:27017',  type: 'Unknown',  hosts: [],  passives: [],  arbiters: [],  tags: {},  minWireVersion: 0,  maxWireVersion: 0,  roundTripTime: -1,  lastUpdateTime: 47955814,  lastWriteDate: 0,  error: MongoNetworkError: connect ECONNREFUSED ::1:27017  at connectionFailureError (/Users/laurenz/uni_workspace/omm-project-ws2122/be/node_modules/mongoose/node_modules/mongodb/lib/cmap/connect.js:293:20)  at Socket.lt;anonymousgt; (/Users/laurenz/uni_workspace/omm-project-ws2122/be/node_modules/mongoose/node_modules/mongodb/lib/cmap/connect.js:267:22)  at Object.onceWrapper (node:events:510:26)  at Socket.emit (node:events:390:28)  at emitErrorNT (node:internal/streams/destroy:164:8)  at emitErrorCloseNT (node:internal/streams/destroy:129:3)  at processTicksAndRejections (node:internal/process/task_queues:83:21)  }  },  stale: false,  compatible: true,  heartbeatFrequencyMS: 10000,  localThresholdMS: 15,  logicalSessionTimeoutMinutes: undefined  } }  Node.js v17.0.1 [nodemon] app crashed - waiting for file changes before starting...  

У кого-нибудь есть подобная проблема или кто знает, как это исправить?

Так что я понял, в чем была проблема.

Я заменил свой вызов на соединение:

 MongoClient.connect('mongodb://127.0.0.1:27017', (err, client) =gt; {  if (err) return console.error(err)  console.log('Connected to Database')   console.log(client); })  

Похоже, это сработает. Я не знаю, почему это не сработало с localhost, но теперь это работает.