Boa*_*och 13 for-loop ejs node.js express
我有一个简单的对象文字,其地址如下所示
address: {
country: String,
state: String,
city: String,
zip: String,
street: String
}
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它的内部是一个我用express.js渲染函数传递的对象.
在我的模板页面中,我正在尝试在此对象内循环,如下所示:
<% for (var prop in artist.address ) { %>
<%- artist.address[prop] %>
<% } %>
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它输出数据但包含ejs函数,如下所示:
function () { return this.get(path); } function () { return this.get(path); } yafo 09988 jerusalem israel israeli [object Object] undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined undefined [object Object] [object Object] function () { var self = this , hookArgs // arguments eventually passed to the hook - are mutable , lastArg = arguments[arguments.length-1] , pres = this._pres[name] , posts = this._posts[name] , _total = pres.length , _current = -1 , _asyncsLeft = proto[name].numAsyncPres , _next = function () { if (arguments[0] instanceof Error) { return handleError(arguments[0]); } var _args = Array.prototype.slice.call(arguments) , currPre , preArgs; if (_args.length && !(arguments[0] == null && typeof lastArg ===
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那我怎么需要迭代我的对象?
除了您在顶部添加的"自有"属性之外,您还可以看到所有继承的属性.
有两种方法可以解决这个问题.一种是用来hasOwnProperty()
确保你看不到继承的属性:
<% for (var prop in artist.address) {
if (Object.prototype.hasOwnProperty.call(artist.address, prop)) { %>
<%- artist.address[prop] %>
<% }
} %>
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或者使用Object.keys()
返回只有非继承属性的数组并迭代它:
<% Object.keys(artist.address).forEach(function(prop) { %>
<%- artist.address[prop] %>
<% }); %>
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由于这是与mongoose相关的,因此您也可以尝试迭代artist.address.toObject()
(使用公共API)或artist.address._doc
(使用私有API)或者在artist
对象上升级.
使用普通JS,您可以使用Object.keys
var obj = { 0: 'a', 1: 'b', 2: 'c' };
console.log(Object.keys(obj)); // console: ['0', '1', '2']
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在你的例子中
var artist = { address: { city: 'Tel Aviv' } };
Object.keys(artist.address).forEach(function(key){
<%- artist.address[city] %> //key will city the output will be 'Tev Aviv'
});
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另一个很酷的方法是使用lodash:lodash forEach
_([1, 2]).forEach(function(n) {
console.log(n);
}).value();
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