WP Rest API + AngularJS : 如何抓取特色图片显示在页面上?

WP Rest API + AngularJS : How to grab Featured Image for display on page?

我正在通过 HTTP REST API 插件访问 Wordpress 数据(这个 wordpress 插件:http://v2.wp-api.org/). I know how to grab my post title, but how do I display the featured image associated with that post using this plugin? My test shows the post title and the featured image ID, but I am unsure how to display the actual image. Test Example

这是我的代码:

    <div ng-app="myApp">
    <div ng-controller="Ctrl">
        <div ng-repeat="post in posts | limitTo: 1">
            <h2 ng-bind-html="post.title.rendered"></h2>

            <p>{{ post.featured_image }}</p>

        </div>
    </div>
</div>


<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.3.15/angular.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/angular.js/1.3.15/angular-sanitize.min.js"></script>

<script>

var app = angular.module('myApp', ['ngSanitize']);
    app.controller('Ctrl', function($http, $scope) {
        $http.get("http://ogmda.com/wp/wp-json/wp/v2/posts").success(function(data) {
        $scope.posts = data;
    });
});

</script>

我找到了一个非常简单的方法。

只需下载名为 Better Rest API Featured Image 的新 Wordpress 插件。此插件将 better_featured_image 字段添加到包含可用图像大小和 url 的 post 对象,使您可以获取此信息信息而无需提出第二个请求。

您可以用 <img ng-src="{{post.better_featured_image.source_url}}" />

替换 <p>{{ post.featured_image }}</p>

更好的方法是将特色图片的 URL 集成到 json 响应中,这样您就可以在一个请求中获得所有内容。您可以添加以下代码(在 your-theme/functions.php 内)来实现此目的:

//Get image URL
function get_thumbnail_url($post){
    if(has_post_thumbnail($post['id'])){
        $imgArray = wp_get_attachment_image_src( get_post_thumbnail_id( $post['id'] ), 'full' ); // replace 'full' with 'thumbnail' to get a thumbnail
        $imgURL = $imgArray[0];
        return $imgURL;
    } else {
        return false;
    }
}
//integrate with WP-REST-API
function insert_thumbnail_url() {
     register_rest_field( 'post',
                          'featured_image',  //key-name in json response
                           array(
                             'get_callback'    => 'get_thumbnail_url',
                             'update_callback' => null,
                             'schema'          => null,
                             )
                         );
     }
//register action
add_action( 'rest_api_init', 'insert_thumbnail_url' );

那么在你看来,你可以使用 {{ post.featured_image }}

注意:要获得不同尺寸的相同图像,请使用上面的 wp_get_attachment_image_src 函数,它接受任何有效的图像尺寸,或宽度和高度值的数组像素作为它的第二个参数。

要获得特色图片响应,请在查询字符串中添加 _embed。示例:

http://demo.wp-api.org/wp-json/wp/v2/posts/?_embed

然后,使用 _embedded['wp:featuredmedia'][0].media_details.sizes.thumbnail.source_url[=22 访问返回的 JSON 响应中的特色图片=]

var app = angular.module('myApp', ['ngSanitize']);
    app.controller('Ctrl', function($http, $scope) {
        $http.get("http://ogmda.com/wp/wp-json/wp/v2/posts?_embed").success(function(data) {
        $scope.posts = data;

        var firstFeaturedImageUrl = $scope.posts[0]._embedded['wp:featuredmedia'][0].media_details.sizes.thumbnail.source_url;
    });
});