Question

如何使用express app.set()访问变量集，例如


app.set('view engine','jade');
app.set('jsDirectory',/js/');

在指南中，我了解我可以使用app.get(<key>)访问相同内容，但这是console.log(app.get('view engine'))的输出。

{ router:
   { app:
      { stack: [Object],
        domain: null,
        _events: [Object],
        _maxListeners: 10,
        _connections: 0,
        connections: [Getter/Setter],
        allowHalfOpen: true,
        _handle: null,
        httpAllowHalfOpen: false,
        cache: {},
        settings: [Object],
        redirects: {},
        isCallbacks: {},
        _locals: [Object],
        dynamicViewHelpers: {},
        errorHandlers: [],
        route: '/',
        routes: [Circular],
        router: [Getter],
        root: 'C:\\Users\\Shahal\\Works\\App',
        models: {},
        extensions: {},
        disconnectSchemas: [Function: disconnectSchemas],
        passport: [Object] },
     routes: {},
     params: {},
     _params: [],
     middleware: [Function] } }

Answer 1

它们可通过app.settings对象获得：

app.set('oneSetting', 'one');
app.set('twoSetting', 'two');
app.set('view engine','jade');

console.log(app.settings.oneSetting);
console.log(app.settings.twoSetting);
console.log(app.settings['view engine']);

Answer 2

我知道这是2岁，但它仍然是谷歌上弹出的第一个链接所以我认为这可能是合适的。

您也可以像这样设置变量

     app.set('port', 3000);

后来用

来搞定

     app.get('port');

我更喜欢这种方法，因为它更短更直接。这也是他们在Express 4.x documentation中使用的方式。

    app.get(name)
    Returns the value of name app setting, where name is one of strings in the app settings table.

Answer 3

app.set('view engine','hbs')
**All are correct:**
app.get('view engine')
app.locals.settings['view engine']
app.settings['view engine']

如何使用快速js中的app.set（）访问变量集

3 个答案: