Mean.js不工作。 无法连接到MongoDB
情况：
我下载了这个版本库： https ： //github.com/meanjs/mean
遵循并执行所有的指示。
没有$ npm start ，得到以下错误：
错误：
Could not connect to MongoDB! { MongoError: failed to connect to server [localhost:27017] on first connect
PS：我确实安装了Mongodb，并检查它是否与$ mongod一起工作。
编辑：
完整的错误消息，如果我做$ npm start ：
+ Important warning: config.domain is empty. It should be set to the fully qualified domain of the app. Could not connect to MongoDB! { MongoError: failed to connect to server [localhost:27017] on first connect at Pool.<anonymous> (/Users/TLL/Desktop/Web Learn/JobBoard/node_modules/mongoose/node_modules/mongodb-core/lib/topologies/server.js:313:35) at emitOne (events.js:96:13) at Pool.emit (events.js:188:7) at Connection.<anonymous> (/Users/TLL/Desktop/Web Learn/JobBoard/node_modules/mongoose/node_modules/mongodb-core/lib/connection/pool.js:271:12) at Connection.g (events.js:291:16) at emitTwo (events.js:106:13) at Connection.emit (events.js:191:7) at Socket.<anonymous> (/Users/TLL/Desktop/Web Learn/JobBoard/node_modules/mongoose/node_modules/mongodb-core/lib/connection/connection.js:165:49) at Socket.g (events.js:291:16) at emitOne (events.js:96:13) at Socket.emit (events.js:188:7) at emitErrorNT (net.js:1278:8) at _combinedTickCallback (internal/process/next_tick.js:74:11) at process._tickCallback (internal/process/next_tick.js:98:9) name: 'MongoError', message: 'failed to connect to server [localhost:27017] on first connect' } (node:5283) UnhandledPromiseRejectionWarning: Unhandled promise rejection (rejection id: 1): MongoError: failed to connect to server [localhost:27017] on first connect /usr/local/bin/node[5283]: ../src/debug-agent.cc:149:void node::debugger::Agent::Stop(): Assertion `(err) == (0)' failed. 1: node::Abort() [/usr/local/bin/node] 2: node::RunMicrotasks(v8::FunctionCallbackInfo<v8::Value> const&) [/usr/local/bin/node] 3: node::debugger::Agent::~Agent() [/usr/local/bin/node] 4: node::debugger::Agent::~Agent() [/usr/local/bin/node] 5: node::Environment::~Environment() [/usr/local/bin/node] 6: node::Start(int, char**) [/usr/local/bin/node] 7: start [/usr/local/bin/node] [21:34:44] [nodemon] app crashed - waiting for file changes before starting...
错误，如果我做$ mongo ：
MongoDB shell version v3.4.1 connecting to: mongodb://127.0.0.1:27017 2017-01-31T21:41:14.839+0100 W NETWORK [main] Failed to connect to 127.0.0.1:27017, in(checking socket for error after poll), reason: Connection refused 2017-01-31T21:41:14.840+0100 E QUERY [main] Error: couldn't connect to server 127.0.0.1:27017, connection attempt failed : connect@src/mongo/shell/mongo.js:234:13 @(connect):1:6 exception: connect failed
在命令行中使用mongod启动MongoDB实例并让它运行。
然后在另一个terminal上运行npm start 。 应该先运行MongoDB实例。
要查看可以传递给mongod的完整选项，可以检查文档 。
根据您的操作系统，您可以search如何将MongoDB实例在引导时运行，因此您不必在单独的窗口中手动运行它。