The Eloquent ORM included with Laravel provides you with an easy way of interacting with your database. This simplifies all CRUD (Create, read, update, and delete) operations and any other database queries. In this tutorial, you will learn how to check if a record exists with Laravel Eloque...
1'state' => 'exists:states,abbreviation'Occasionally, you may need to specify a specific database connection to be used for the exists query. You can accomplish this by prepending the connection name to the table name using "dot" syntax:1'email' => 'exists:connection.staff,email'...
*/publicfunctiondown(){Schema::dropIfExists('admins'); } } 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 管理员模型填充数据 定义一个数据模型工厂,在database/factories/ModelFactory.php中添加如下代码 $factory->define(App\...
If you are displaying old input within a Blade template, it is more convenient to use the old helper to repopulate the form. If no old input exists for the given field, null will be returned:1A Note On Optional FieldsBy default, Laravel includes the TrimStrings...
* @return \Illuminate\Database\Eloquent\Builder */publicfunctionscopeSearch(Builder $query,array $search=[]){if(empty($search)){return$query;}if(!array_intersect(array_keys($search),$this->searchable)){return$query;}return$query->where($search);}} ...
laravel中web middle会对Post操作做保护,必须有一个csrf的隐藏域放在form post data中,laravel才允许向下走。为了让laravel通过这个保护验证,我们需要在form中通过{{ csrf_field() }}来完成这个数据的存放: {{ csrf_field() }}//会在form中产生以下field: laravel REST API的put,patch,delete操作的实现 由于所有...
...推荐Laravel开发插件三件套,提高开发效率,可以参考之前写的Laravel5.2之Seeder填充数据小技巧: composer require barryvdh/laravel-debugbar...$id; //Redis命令SISMEMBER检查集合类型Set中有没有该键,该指令时间复杂度O(1),Set集合类型中值都是唯一 $existsInRedisSet =...count; $postModel->save(); }...
('files', $files);}public function check(Request $request){$path = $request->input('path', $this->path);$filename = $request->input('filename', null);if($filename){if(!file_exists($path . $filename)){Flash::error('磁盘文件已删除,刷新文件列表');}else{Flash::success('文件有效...
Checking a property if it existsThere might be times when you want to check if a property exists in the database. This can be done as such:public function up(): void { if ($this->migrator->exists('general.timezone')) { // do something } }...
dataGet()dot notated get dataSet()dot notated set toDot()toDotclass call()call function on items pushTo()push to other array/collection Arr MethodDescription cut()Studly Namespace merge()Studly Namespace prefix()Studly Namespace ByteUnits ...