Vue.js 2：从 AJAX 方法获取数据

Question

I'm new to Vue, and I'm attempting to grab the data via AJAX in a method.

I know the method is working.

Here's the Vue code:

Vue.component('sub-folder', {
    props: ['folder'],
    template: '<a href="#">{{folder.title}}</a>'
});

var buildFoldersList = new Vue({
    el: '#sub-folders',
    data: {
        foldersList: this.foldersList
    },
    methods: {
        buildFolders: function () {
            $.ajax({
                url: base_url + 'api/folder/get_subfolders/' + browser_folder_id,
                method: 'POST',
                data: {
                    "folder_id": browser_folder_id
                },
                success: function (data) {
                    console.log("Data");
                    console.log(data);
                    this.foldersList = data;
                },
                error: function (error) {
                    alert(JSON.stringify(error));
                }
            });
        }
    }
});

Here's the HTML:

<div class="list-group" id="sub-folders">
    <sub-folder v-for="folder in foldersList" :key="folder.folder_id" v-bind:folder="folder"></sub-folder>
</div>

At the moment, the containing template is running, but since the method isn't getting executed, there's no data.

I've tried everything I know to trigger the method, but I've run out of ideas.

Answer 1

It seems you are not calling the buildFolders method at all, you can call it from the created hook of vue.js like following:

var buildFoldersList = new Vue({
    el: '#sub-folders',
    data: {
        foldersList: []
    },
    created () {
       this.buildFolders()
    },
    methods: {
        buildFolders: function () {   
            var self = this 
            $.ajax({
                url: base_url + 'api/folder/get_subfolders/' + browser_folder_id,
                method: 'POST',
                data: {
                    "folder_id": browser_folder_id
                },
                success: function (data) {
                    console.log("Data");
                    console.log(data);
                    self.foldersList = data;
                },
                error: function (error) {
                    alert(JSON.stringify(error));
                }
            });
        }
    }
});

Also you can relook at how you are using this, as scope of this will change in $.ajax method as happened here , see the explanation here .