javascript 如何检索 Ember.js 模型的所有属性
声明：本页面是StackOverFlow热门问题的中英对照翻译，遵循CC BY-SA 4.0协议，如果您需要使用它，必须同样遵循CC BY-SA许可，注明原文地址和作者信息，同时你必须将它归于原作者（不是我）：StackOverFlow
原文地址: http://stackoverflow.com/questions/15658442/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
How to retrieve all properties of an Ember.js model
提问by joscas
I'm working with forms in Ember.js and I want to retrieve a list of all model properties so that I can take snapshots of the state of the form at different moments. Is there a way to get a list of all properties of a model?
我正在处理 Ember.js 中的表单，我想检索所有模型属性的列表，以便我可以在不同时刻拍摄表单状态的快照。有没有办法获得模型的所有属性的列表？
For example, if my model is:
例如，如果我的模型是：
App.User = DS.Model.extend({
name: DS.attr('string'),
email: DS.attr('string'),
current_password: DS.attr('string'),
password: DS.attr('string'),
password_confirmation: DS.attr('string'),
admin: DS.attr('boolean'),
}
Then I would like to have something like this:
然后我想要这样的东西：
> getEmberProps('User')
["name", "email", "current_password", "password", "password_confirmation", "admin"]
回答by piotrze
回答by Michael
You can also use this:
http://emberjs.com/api/data/classes/DS.Model.html#property_attributeshttp://emberjs.com/api/data/classes/DS.Model.html#method_eachAttribute
你也可以使用这个：
http: //emberjs.com/api/data/classes/DS.Model.html#property_attributes http://emberjs.com/api/data/classes/DS.Model.html#method_eachAttribute
Ember.get(App.User, 'attributes').map(function(name) { return name; });
Ember.get(userInstance.constructor, 'attributes').map(function(name) { return name; });
There's also similar properties for relationships too.
关系也有类似的属性。
回答by calcsam
An easy way to print out the fields and their values:
打印字段及其值的简单方法：
Ember.keys(model.toJSON()).forEach(function(prop) { console.log(prop + " " + model.get(prop)); } )
回答by mavilein
There is no easy way, but you could try a custom mixin like this:
没有简单的方法，但您可以尝试像这样的自定义 mixin：
Ember.AllKeysMixin = Ember.Mixin.create({
getKeys: function() {
var v, ret = [];
for (var key in this) {
if (this.hasOwnProperty(key)) {
v = this[key];
if (v === 'toString') {
continue;
} // ignore useless items
if (Ember.typeOf(v) === 'function') {
continue;
}
ret.push(key);
}
}
return ret
}
});
You can use it like this:
你可以这样使用它：
App.YourObject = Ember.Object.extend(Ember.AllKeysMixin, {
... //your stuff
});
var yourObject = App.YourObject.create({
foo : "fooValue";
});
var keys = yourObject.getKeys(); // should be ["foo"];
回答by mistahenry
in 2018: use Ember Data's eachAttribute.
2018 年：使用 Ember Data 的eachAttribute。
So, given a model Foo:
所以，给定一个模型 Foo：
import Model from 'ember-data/model';
import attr from 'ember-data/attr';
export default Model.extend({
"name": attr('string'),
"status": attr('string')
});
Let's get the model's definition via the constructor:
让我们通过构造函数获取模型的定义：
var record = this.store.createRecord('foo', {
name: "model1",
status: "status1"
});
this.modelClass = record.constructor;
and invoke a function for each of its Ember Data attributes:
并为其每个 Ember Data 属性调用一个函数：
modelClass.eachAttribute(function(key, meta){
//meta provides useful information about the attribute type
}
