.save和$save对天使资源的差异

Question

我看到了将$save和save都称为$resource (角)的代码。

，两者有什么区别，什么时候使用？

Answer 1

最好的解释===示例：

// by writing '{ id: '@id' }' we want the id to be taken from 'id' parameter in request data, hence the '@' sign. Note that this mechanism is available for non-GET RQs only:
var Notes = $resource('/notes/:id', { id: '@id' });

var noteId = "my_note1";
// below we specify 'id' explicitly - has to be done for GET RQ:
// operations on our note are done inside callback function, just to make sure that the note is resolved:
var note = Notes.get({ id: noteId }, function () {

    // let's make some changes:
    note.topic = "A brand new topic here!";

    // save using $resource "static" action (aka "class" action). 'id' is taken from data object:
    Notes.save(note);
    // We can overwrite 'id' just like this: 
    Notes.save({ id: "some_other_noteId" }, note);

    // even more changes:
    note.body = "Blah blah blah, new boring body is here";

    // this time save using instance action. Again: 'id' is taken from data object:
    note.$save();
    // changing id with instance action? there you go:
    note.$save({ id: "yet_another_noteId" });

    // Naturally, we could just:
    note.id = "OMG_how_many_of_those_noteIds_has_he_left";
    Notes.save(note);
    // ... and with instance action:
    note.id = "OK_he_wins";
    note.$save();
});

即使是自定义的$resource操作(由您定义)也有它们的$-prefixed对应项，只要它们是不可见的creating-a-custom-put-request。

不，并不是所有的动作都有实例方法版本。在实例上调用GET有什么意义？来自官方ngResource文档：

可以使用以下参数调用类对象或实例对象上的操作方法：

• 获取“类”操作:Resource.action(参数、成功、错误)
• 非获取“类”操作:Resource.action(参数、postData、成功、错误)
• 非获取实例操作:实例.$action(参数、成功、错误)

Answer 2

$save是由$resource的一个动作添加的方法。保存可以是一种通过特殊资源进行保存的方法。

所有动作都有$前缀的方法。在这里阅读更多：http://docs.angularjs.org/api/ngResource.$resource