實體表設計：
id,category_id,all_ids,user_id,create_time這五個字段，分別是主鍵，分類ID，按贊ID，用戶ID，創建時間。這裡的分類ID是用於有多個按贊需求的設計，例如文章，商品，視頻等。
/**
* Created by .
* User: 周洪亮
* Date: 2017/3/31
* Time: 10:30
* 按贊方法
*/
public function add()
{
$uid = $_SESSION['uid'];
$article_id = I('article_id');//文章ID
$initial_quantity = C('THANKED_INITIAL_QUANTITY');//按贊初始數量
$customer_logic=new CustomerLogic();
$result = $customer_logic->addLogic($uid, $article_id);//按贊邏輯方法
if ($result['status'] == -1) {
exit(json_encode($result));
}
if ($result['status'] == -2) {
$data = $result['result'];
$del_where['id'] = $data['id'];
$del = $this->db->where($del_where)->delete();//刪除
if ($del) {
$thanked_number = ThankedCount($article_id, 1, $initial_quantity);
exit(json_encode(array('status' => 2, 'msg' => '取消按贊成功', 'thanked_number' => $thanked_number)));
}
}
if ($article_id != null) {
$db_data['all_ids'] = $article_id;
$db_data['category_id'] = 3;
}
$db_data['user_id'] = $uid;
$db_data['create_time'] = date('Y-m-d H:i:s');
$add = $this->db->data($db_data)->add();
if ($add) {
$thanked_number = ThankedCount($article_id, 1, $initial_quantity);
exit(json_encode(array('status' => 1, 'msg' => '按贊成功', 'thanked_number' => $thanked_number)));
} else {
exit(json_encode(array('status' => -404, 'msg' => '您的網路出現故障或我們服務器正在維修')));
}
}
/**
* Created by .
* User: 周宏亮
* Date: 2017/3/30
* Time: 18:46
* 按贊邏輯方法
* @param $uid 用戶唯一標識
* @param $shop_id 店鋪唯一ID
* @param $goods_id 商品唯一標識
*/
public function addLogic($uid, $article_id = '')
{
if ($uid == '') {
return array('status' => -1, 'msg' => '登錄後在按贊');
}
if ($article_id != null) {
$article_find = ThankedFind($uid, $article_id, 3);//查詢方法
if ($article_find != '') {
return array('status' => -2, 'msg' => '已按贊', 'result' => $article_find);
}
}
}
/**
* Created by .
* User: 周宏亮
* Date: 2017/3/31
* Time: 11:07
* 按贊，查詢是否已按贊
*/
function ThankedFind($uid, $all_ids, $category)
{
$where['user_id'] = $uid;
$where['all_ids'] = $all_ids;
$where['category_id'] = $category;//3是文章，1是商品，店鋪2
$find = M('Thanked')->where($where)->find();
return $find;
}
function ThankedCount($id, $category, $initial_quantity)
{
$where['all_ids'] = $id;
$where['category_id'] = $category;
$count = M('Thanked')->where($where)->count();
$number = $count + $initial_quantity;
return $number;
}
