.save和$ save到angularjs中的资源之间的区别

debugcn 发表于 Dev

快乐吉尔摩

我已经看到了角度调用$save和调用save$ resource的代码。

有什么区别？什么时候使用？

乌卡鲁

最佳解释===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();
});

$resource只要自定义操作（由您定义）也具有-$前缀（只要它们不是GET），请参见http://docs.angularjs.org/api/ngResource.$resource#example_creating-a-custom-put-要求。
不，并非所有动作都具有实例方法版本。调用GET实例的目的是什么？从官方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：

HTTP GET“类”操作：Resource.action（[参数]，[成功]，[错误]）

非GET“类”操作：Resource.action（[参数]，postData，[成功]，[错误]）

非GET实例操作：instance。$ action（[参数]，[成功]，[错误]）

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