从化身获取BuddyPress活动id

Question

当用户上传一个新的化身时，阿凡达被张贴在活动墙中。如何使用userId获得这个活动ID？

我认为唯一的方法是创建一个自己的查询，对吗？

Answer 1

您可以编写一个查询来获取该活动。还有一个过滤器，您可以挂接到它将被调用后，阿凡达上传(稍后解释)：

<?php

global $wpdb;

$query = "SELECT * FROM {$wpdb->prefix}bp_activity WHERE " .
         "`type` = 'new_avatar' AND `user_id` = %d " .
         "ORDER BY `date_recorded` DESC LIMIT 1";

$result = 
$wpdb->get_row(
    $wpdb->prepare($query, $user_id)
);

if ($result) {
    // found an activity item for avatar upload
    var_dump($result);
} else {
    // user has not uploaded an avatar
}

结果如下：

stdClass Object
(
    [id] => 2   <-- this is the activity ID
    [user_id] => 1
    [component] => profile
    [type] => new_avatar
    [action] => admin changed their profile picture
    [content] => 
    [primary_link] => http://example.com/wordpress/members/admin/
    [item_id] => 0
    [secondary_item_id] => 0
    [date_recorded] => 2016-03-29 04:41:53
    [hide_sitewide] => 0
    [mptt_left] => 0
    [mptt_right] => 0
    [is_spam] => 0
)

当这个活动发生时，就会调用一个您可以挂钩的动作。它是xprofile_avatar_uploaded，它传递两个参数，$item_id (用户ID)和$type (例如裁剪或摄像机)。这个过滤器是在一个化身上传后执行的。

在您的功能中添加：

add_action('xprofile_avatar_uploaded', 'callback');

function callback($user_id, $type)
{
    // $user_id uploaded new avatar
}

我发现你也可以打电话：

$img = bp_get_activity_avatar(['user_id' => $user_id]);

让HTML显示化身。它们存储在wp-content/uploads/avatars中。

你也可以打电话：

$url = bp_core_fetch_avatar(['item_id' => $user_id, 'html' => false]);

才能得到头像的完整网址。