javascript backbone.js 设置模型属性内部字段
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backbone.js set model attribute inner field
提问by Harry
I want to set an attribute of a backbone.js model, but only an inner field rather than the entire field.
我想设置一个backbone.js 模型的属性，但只设置一个内部字段而不是整个字段。
Example code might be:
示例代码可能是：
model.set('user.avatar', 'img')
Anything I can do?
我有什么可以做的吗？
Thanks
谢谢
回答by minikomi
You could simply make a copy of the object, set the attribute, and then re-set it on the original model:
您可以简单地复制对象，设置属性，然后在原始模型上重新设置它：
var userAttributes = model.get("user");
userAttributes.avatar = "img";
model.set("user", userAttributes)
Or add a function to set parts of the user on the model from an object:
或者添加一个函数来从一个对象在模型上设置用户的部分：
model = Backbone.Model.extend({
...
setUser: function(attributes){
var user = this.get("user") || {};
_.extend(user, attributes);
this.set({user:user});
},
...
Then pass in attributes like so: model.setUser({avatar: "img"});
然后像这样传入属性： model.setUser({avatar: "img"});
