is_null() 函数用于检测变量是否为 NULL。 $code=Input::get('code');if(!is_null($code)) {returnResponse::json(['status'=>1]); }else{returnResponse::json(['status'=>0]); }//first也是$select=Location::select('…')->where(…)->first()if(is_null($select)){//操作}else{//操作}...
*/protectedfunctionrunSoftDelete(){$query=$this->setKeysForSaveQuery($this->newModelQuery());$time=$this->freshTimestamp();$columns=[$this->getDeletedAtColumn()=>$this->fromDateTime($time)];$this->{$this->getDeletedAtColumn()}=$time;if($this->timestamps&&!is_null($this->getUpdate...
在使用 Laravel Eloquent 模型时,我们要判断取出的结果集是否为空,但我们发现直接使用 is_null 或 empty是无法判段它结果集是否为空的!!! var_dump 之后我们很容易发现,即使取到的空结果集,Eloquent 仍然会返回object(Illuminate\Support\Collection)对象实例。 其实,Eloquent 已经给我们封装几个判断方法如下: $user...
在laravel中 deleted_at 字段默认查询方式是 deleted_at is null ,而现在很多数据库默认字段不能设置为null,目前有一个解决方案,在model类中将deleted_at设置格式为时间戳 在model里加上如下代码: //const DELETED_AT='deleted_at'; //set the date format as timestamp protected $dateFormat='U'; 官方文档:...
($event,$payload);if($this->shouldBroadcast($payload)){$this->broadcastEvent($payload[0]);}$responses=[];foreach($this->getListeners($event)as$listener){$response=$listener($event,$payload);if($halt&&!is_null($response)){return$response;}if($response===false){break;}$responses[]=$...
Since our own model extends theIlluminate\Database\Eloquent\Model, we take a glance at it. Here is thedelete()function: publicfunctiondelete(){if(is_null($this->getKeyName())){thrownewException('No primary key defined on model.');}if($this->exists){if($this->fireModelEvent('deleting...
my console.log("product", productsData) give me a null value. But when i reload the page doing ctrl+s in my IDE the website request go into API once more and then give the good result with good data associated. It doesn't happen only here but for every request i make...
The whereNull method verifies that the value of the given column is NULL. https://laravel.com/docs/5.5/queries Share Follow answered Dec 12, 2017 at 2:12 Soji Carnegie Joseph 2922 bronze badges Add a comment Not the answer you're looking for? Browse other questions tagged php lara...
["is_selling"]=int(0)["from_id"]=int(0)["sell_type"]=int(0)["sell_time"]=int(0)["sell_user_id"]=int(0)["is_compose"]=int(0)["group_cover"]=string(0)""["is_delete"]=int(0)["score"]=int(100)["created_at"]=NULL["updated_at"]=NULL["coupon"]=NULL// 注意返回了...
Arr::first($array, function ($value, $key) { return ! is_null($value); });In previous versions of Laravel, the $key was passed first. Since most use cases are only interested in the $value it is now passed first. You should do a "global find" in your application for these ...