AngularJS计数ngResource返回的文件夹中的对象 [英] AngularJS Counting objects in a folder returned by ngResource

问题描述

我正在学习AngularJS，我想我可能是一个简单的问题.

I am learning AngularJS and I have what I imagine is probably a simple issue.

我正在使用$ Resource从文件夹中获取json对象，并且需要对文件夹中的对象进行计数.我已经能够在save函数中的回调语句中获得所需的值，但是我做错了什么，因此无法将其返回到需要使用的位置.我正在使用计数作为一种为文件夹中创建的文件自动增加ID的方法.

I am using $Resource to get json objects from a folder, and need to have a count of the objects in the folder. I have been able to get the value I am looking for in a callback statement within the save function, but I am doing something wrong, and I am unable to return it to where I need to use it. I am using the count as a way to auto increment the ID's for the files created in the folder.

我在代码中有注释，说明可以在何处访问该值以及需要在何处访问它，所有这些均在保存功能内.

I have comments in the code as to where I can access the value, and where I need to access it, its all within the Save Function.

任何帮助将不胜感激.

我的服务:

eventsApp.factory('eventData', function($resource) {
var resource = $resource('/data/event/:id', {id: '@id'}, {"getAll": {method: "GET", isArray:true, params: {something: "foo"}}});
return {
    getEvent: function(eventId) {
        return resource.get({id:eventId});
    },
    save: function(event) {

        resource.query(function(data){ 
                       console.log("Event ID In: " + data.length); //value is accessible here
                      });

        event.id = ; //need to access value here
        return resource.save(event);


    },
    getAllEvents: function() {

        return resource.query();
    }
};

});

谢谢

推荐答案

您可以这样做，而无需在$ resource周围使用包装器

You can do it like that, without the need of a wrapper around $resource

eventsApp.factory('eventData', function($resource) {
    return $resource('/data/event/:id');
});

然后在您使用工厂的地方(例如控制器代码)，可以为此功能定义一个函数

Then in the place you use your factory (e.g. controller code), you can define a function for this behavior

function saveEvent(event) {
    eventData.query(function(data){ 
        console.log("Event ID In: " + data.length); //value is accessible here
        event.id = data.length;
        eventData.save(event);
    });
}

但是我认为您应该重新考虑数据库设计.对我而言，始终将保存与查询连接似乎不是一个有效的解决方案.

But I think you should reconsider your database design. Connecting a save with a query all the time seems not like an efficient solution to me.

这篇关于AngularJS计数ngResource返回的文件夹中的对象的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！