本文介绍了雄辩左派加盟,取得意想不到的成果的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!

问题描述

概述:



我有两个表名为 event_meta 选项



选项:





事件元数据





我有一个名为Event Meta的表,其中存储了特定事件的子信息。现在我想要发生的是使用 leftjoin

连接 event_meta 选项 code>在雄辩中。



这是我的代码。

  public function getMetaValue($ key){

$ event_meta = $ this-> hasOne('Core\Event\EventMeta','event_id')
- > leftjoin('options','options.id','=','event_meta.meta_value')
- > where('meta_key','=',$ key)
- > ();

//如果Option [table]的值为空,它将检索Event Meta的[table]值,否则返回false。
return(empty($ event_meta-> value))? (空($ event_meta-> meta_value))? false:$ event_meta-> meta_value:$ event_meta-> value;
}

现在的问题是..如果我检索到 meta_key logo ...





它从名为的选项表中检索值为$ code> 6

的顶部




注意 meta_key中的第一个字符 logo的 meta_value 它在选项的id中具有相同的值。



所以我做的是将我的 options.id AS TEXT转换为与相同的类型event_meta.meta_value
$ b

所以我像这样投下了

  $ leftjoin-> on(DB :: raw('CAST(options.id AS CHAR(1000))'),'=','event_meta.meta_value'); 

Cast(SO ANSWER)参考:



所以看起来像这样!

  public function getMetaValue($ key){

$ event_meta = $ this-> hasOne('Core\\ ($ item)'
- > leftjoin('options',function($ leftjoin){
$ leftjoin-> on(DB :: raw('CAST $ id =','=',$ key)
- >其中('meta_key','=',$ key)
;第一();

return(empty($ event_meta-> value))? (空($ event_meta-> meta_value))? false:$ event_meta-> meta_value:$ event_meta-> value;
}

第二个解决方案来自我老板的工作(对他的信用)。他做了什么是在leftjoin上添加了另一个 AND ,将 event_meta.meta_value 转换为一个整数,只需将其乘以1 。

  public function getMetaValue($ key){

$ event_meta = $ this-> hasOne ('Core\Event\EventMeta','event_id')
- > leftjoin('options',function($ leftjoin){
$ leftjoin-> on('options.id' ,'=','event_meta.meta_value');
$ leftjoin-> on(DB :: raw('CONCAT(,event_meta.meta_value * 1)'),'=','event_meta。 meta_value');
}) - > where('meta_key','=',$ key)
- > first();

return(empty($ event_meta-> value))? (空($ event_meta-> meta_value))? false:$ event_meta-> meta_value:$ event_meta-> value;
}


Overview:

I have two tables called event_meta and options.

Options:

Event Meta:

I have a table called Event Meta where the sub information of specific event are stored. Now what I want to happen is to connect the event_meta and options table using leftjoin in eloquent.

Here's my code for that.

public function getMetaValue($key) {

    $event_meta = $this->hasOne('Core\Event\EventMeta', 'event_id')
        ->leftjoin('options', 'options.id', '=', 'event_meta.meta_value')
        ->where('meta_key', '=', $key)
        ->first();

    // If Option[table] value is empty, it will retrieve for Event Meta's[table] value, else It will return false.
    return (empty($event_meta->value)) ? (empty($event_meta->meta_value)) ? false : $event_meta->meta_value : $event_meta->value;
}

Now the problem is.. If I retrieve the meta_key logo...

It retrieves the value from options table called Top Up that has the id of 6

Notice the first character in meta_key logo's meta_value it has the same value in option's id.

I tried changing the 6 to 7, the value's change and it retrieves the Option's Vending POS.

Any solution for this? This isn't supposed to happen though. Since logo's value is waaay longer than the actual id of options.

--- Edit ---

My attempts fixing it while waiting for help.

1st Attempt:

I tried this solution just for the sake it might be fixed. Still does not work.

public function getMetaValue($key) {

    $event_meta = $this->hasOne('Core\Event\EventMeta', 'event_id')
        ->leftjoin('options', function($query) {
            $query->on('options.id', '=', 'event_meta.meta_value');
        })->where('meta_key', '=', $key)
        ->first();
    return (empty($event_meta->value)) ? (empty($event_meta->meta_value)) ? false : $event_meta->meta_value : $event_meta->value;
}
解决方案

I've got an answer to this question! It's not because it's Eloquent but it's really on MYSQL query that has a problem. Well technically my fault for not converting it to same type.

Thanks to this guy's help who answered my related question here.

https://stackoverflow.com/a/32647701/1699388

So what I did is I converted my options.id AS TEXT to have the same type as event_meta.meta_value in my left join query.

So I casted it like this

$leftjoin->on(DB::raw('CAST(options.id AS CHAR(1000))'), '=', 'event_meta.meta_value');

Reference for Cast (SO ANSWER): https://stackoverflow.com/a/12127022/1699388

So what it looks like is this!

public function getMetaValue($key) {

    $event_meta = $this->hasOne('Core\Event\EventMeta', 'event_id')
        ->leftjoin('options', function($leftjoin) {
            $leftjoin->on(DB::raw('CAST(options.id AS CHAR(1000))'), '=', 'event_meta.meta_value');
        })->where('meta_key', '=', $key)
        ->first();

    return (empty($event_meta->value)) ? (empty($event_meta->meta_value)) ? false : $event_meta->meta_value : $event_meta->value;
}

Second Solution is from my boss in work (Credits to him). What he did is he added another AND on leftjoin to convert event_meta.meta_value to an integer by just multiplying it to 1.

public function getMetaValue($key) {

    $event_meta = $this->hasOne('Core\Event\EventMeta', 'event_id')
        ->leftjoin('options', function($leftjoin) {
            $leftjoin->on('options.id', '=', 'event_meta.meta_value');
            $leftjoin->on(DB::raw('CONCAT("", event_meta.meta_value * 1)'), '=', 'event_meta.meta_value');                
        })->where('meta_key', '=', $key)
        ->first();

    return (empty($event_meta->value)) ? (empty($event_meta->meta_value)) ? false : $event_meta->meta_value : $event_meta->value;
}

这篇关于雄辩左派加盟,取得意想不到的成果的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持!

10-19 16:28