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webman-查詢構造器-参数分组,whereExists的用法

发布时间：2022-02-05 12:20:19编辑：雪饮阅读（）

 實例：

    public function index(Request $request)
    {

        ini_set('memory_limit','4096M');
       //參數分組
        $data = Db::table('ecms_news')
            ->where('username', '=', '雪饮')
            ->where(function ($query) {
                $query->where('classid', '>', 83)
                    ->orWhere('newspath', '=', '2015-02-03');
            })
            ->get();
        $paramsGroup=isset($data[0]) ? $data[0] : [];

        //whereExists
        $data = Db::table('ecms_news')
            ->whereExists(function ($query) {
                $query->select(Db::raw(1))
                    ->from('ecms_news_data_1')
                    ->whereRaw('phome_ecms_news_data_1.classid = phome_ecms_news.classid');
            })
            ->get();
        $whereExists=isset($data[0]) ? $data[0] : [];

        $all=compact("paramsGroup","whereExists");
        var_dump($all);

        return response("ok");
    }
 構造的sql：
select * from `phome_ecms_news` where `username` = '雪饮' and (`classid` > 83 or `newspath` = '2015-02-03')
select * from `phome_ecms_news` where exists (select 1 from `phome_ecms_news_data_1` where phome_ecms_news_data_1.classid = phome_ecms_news.classid)
這裏的select 1的理解：
有时候为了提高效率，只是为了测试下某个表中是否存在记录，就用1来代替。常搭配 exists方法当条件使用。
 實例被請求時：
[root@localhost webman]# /usr/local/php734/bin/php -c /usr/local/php734/lib/php.ini start.php start
Workerman[start.php] start in DEBUG mode
----------------------------------------- WORKERMAN -----------------------------------------
Workerman version:4.0.26          PHP version:7.3.4
------------------------------------------ WORKERS ------------------------------------------
proto   user            worker          listen                 processes    status
tcp     root            webman          http://0.0.0.0:8787    4             [OK]
tcp     root            monitor         none                   1             [OK]
---------------------------------------------------------------------------------------------
Press Ctrl+C to stop. Start success.
訪問了全局中間件！
array(2) {
  ["paramsGroup"]=>
  object(stdClass)#54 (37) {
    ["id"]=>
    int(83)
    ["classid"]=>
    int(67)
    ["ttid"]=>
    int(0)
    ["onclick"]=>
    int(4495)
    ["plnum"]=>
    int(0)
    ["totaldown"]=>
    int(0)
    ["newspath"]=>
    string(10) "2015-02-03"
    ["filename"]=>
    string(2) "83"
    ["userid"]=>
    int(1)
    ["username"]=>
    string(6) "雪饮"
    ["firsttitle"]=>
    int(0)
    ["isgood"]=>
    int(0)
    ["ispic"]=>
    int(1)
    ["istop"]=>
    int(0)
    ["isqf"]=>
    int(0)
    ["ismember"]=>
    int(0)
    ["isurl"]=>
    int(0)
    ["truetime"]=>
    int(1422962195)
    ["lastdotime"]=>
    int(1423559710)
    ["havehtml"]=>
    int(1)
    ["groupid"]=>
    int(0)
    ["userfen"]=>
    int(0)
    ["titlefont"]=>
    string(0) ""
    ["titleurl"]=>
    string(48) "/mobanfenxiang/gerenbokemoban/2015-02-03/83.html"
    ["stb"]=>
    int(1)
    ["fstb"]=>
    int(1)
    ["restb"]=>
    int(1)
    ["keyboard"]=>
    string(75) "测试文章关键字1,测试文章关键字2,测试文章关键字3,雪饮"
    ["title"]=>
    string(42) "情侣博客模板系列之《回忆》PSD"
    ["newstime"]=>
    int(1422962138)
    ["titlepic"]=>
    string(84) "/d/file/mobanfenxiang/gerenbokemoban/2015-02-09/66a6753961114f06ae33e3fed8eeca93.jpg"
    ["ftitle"]=>
    string(0) ""
    ["smalltext"]=>
    string(247) "     情侣博客模板系列之《回忆》,分为四个主要部分，照片墙、情侣介绍、图文组、祝福模块。适合爱晒照片的小情侣，或者喜欢旅行类的朋友们，希望喜欢这款模板。效果上，css3动画会"
    ["diggtop"]=>
    int(0)
    ["push_weixin_material"]=>
    int(0)
    ["push_baidu_last_time"]=>
    int(0)
    ["push_weixin_material_last_time"]=>
    int(0)
  }
  ["whereExists"]=>
  object(stdClass)#125 (37) {
    ["id"]=>
    int(114)
    ["classid"]=>
    int(83)
    ["ttid"]=>
    int(0)
    ["onclick"]=>
    int(62)
    ["plnum"]=>
    int(0)
    ["totaldown"]=>
    int(0)
    ["newspath"]=>
    string(0) ""
    ["filename"]=>
    string(3) "114"
    ["userid"]=>
    int(1)
    ["username"]=>
    string(6) "雪饮"
    ["firsttitle"]=>
    int(0)
    ["isgood"]=>
    int(0)
    ["ispic"]=>
    int(1)
    ["istop"]=>
    int(0)
    ["isqf"]=>
    int(0)
    ["ismember"]=>
    int(0)
    ["isurl"]=>
    int(0)
    ["truetime"]=>
    int(1423920308)
    ["lastdotime"]=>
    int(1425445123)
    ["havehtml"]=>
    int(1)
    ["groupid"]=>
    int(0)
    ["userfen"]=>
    int(0)
    ["titlefont"]=>
    string(0) ""
    ["titleurl"]=>
    string(30) "/manshenghuo/xinshang/114.html"
    ["stb"]=>
    int(1)
    ["fstb"]=>
    int(1)
    ["restb"]=>
    int(1)
    ["keyboard"]=>
    string(0) ""
    ["title"]=>
    string(30) "一个程序员的爱情故事"
    ["newstime"]=>
    int(1423920134)
    ["titlepic"]=>
    string(76) "/d/file/manshenghuo/xinshang/2015-02-14/01e4753ff30b6bf0838b6e55cbe88c39.jpg"
    ["ftitle"]=>
    string(35) "程序员,爱情,雪饮个人博客"
    ["smalltext"]=>
    string(170) " //一个程序员的爱情故事    public class MyLoveStory    {        public static void Main(string[] args)        {            //The ForeStory            int result"
    ["diggtop"]=>
    int(0)
    ["push_weixin_material"]=>
    int(0)
    ["push_baidu_last_time"]=>
    int(0)
    ["push_weixin_material_last_time"]=>
    int(0)
  }
}