Check if a record exists Laravel provides a really nice method called exists, which allows you to check if your query returns any records rather than using the count method. if (Post::where('slug', $slug)->exists()) { // post with the same slug already exists } I always prefer to...
If you were previously using the has method to determine if an Illuminate\Support\MessageBag instance contained any messages, you should use the count method instead. The has method now requires a parameter and only determines if a specific key exists in the message bag....
consists of the values to insert or update, while the second argument lists the column(s) that uniquely identify records within the associated table. The method's third and final argument is an array of the columns that should be updated if a matching record already exists in the database....
在这种情况下，应使用exists规则验证product_id字段，以确保在ignore方法中使用指定的product_id之前，该字...
To check if the type for the Elasticquent model exists yet, use typeExists:$typeExists = Book::typeExists();Indexing DocumentsTo index all the entries in an Eloquent model, use addAllToIndex:Book::addAllToIndex();You can also index a collection of models:...
这个问题已经困扰好久了，唉 比较难受，本来学习laravel使用的是Bootstrap，之后用的是Uploadify进行上传图片，无奈，这个技术需要Flash的支持，一直没有实现，后来思考再三，还是选择用Layui后台框架进行设计，emm~~~毕竟用他的组件可以实现和Uploadify一样的无刷新上传图片的效果，但是比较难受的就是Laravel使用Layui进行...
('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...
This PR unreverts#48531and revivesfirstOrCreateupdateOrCreateenhancement undercreateOrFirst. They were unreliable in previous versions. In high-load applications, unique key constraint errors would occur even when checking for the existence of a record beforehand. The purpose of refactoring withcreate...
exists checks for the presence of the Model in the database (you have found the Model by its id). It does not check if the new attributes that you have assigned already exist on a different record in the database. Also, what you're doing is redundant - you assign to the Model prope...
号来 嵌套视图,比如, 如果视图存放路径是resources/views/admin/profile.php,那我们可以这样 它: return view(file, $data); 判断视图是否存在 如果需要判断视图是否存在,可调用在不带参数的 view 之后使用 exists 方法,如果视图 在磁盘存在则返回 true: if (view()-exists( s.customer)) { // } 调用不带...