如何简化 if elseif 语句以从 laravel MySQL 数据库中获取特定的搜索数据

Question

我正在从变量数据中的控制器收集所有数据，如 id、名称、日期、empid

$data = $request->all();

现在我想 select mysql table 中的所有行基于我从这样的请求中收到的输入值。

如果没有给出值则 select 全部来自 DB

if ($data['keyvalue'] == '' && $data['datefrom'] =='' && $data['dateto'] =='' && $data['prepid'] =='' ){

           $country =  country::get();

如果只给出特定的输入值

elseif ($data['keyvalue'] !== '' && $data['datefrom'] =='' && $data['dateto'] =='' && $data['prepid'] =='' ){

            $country = country::where('sr_status','LIKE','%'.$data['status'].'%')
                    ->Where('sr_name','LIKE','%'.$data['keyvalue'].'%')
                    ->orWhere('tel_code','LIKE','%'.$data['keyvalue'].'%')
                    ->orWhere('country_code','LIKE','%'.$data['keyvalue'].'%')
                    ->orWhere('currency_name','LIKE','%'.$data['keyvalue'].'%')
                    ->orderBy('sr_id')
                    ->get();

}elseif ($data['keyvalue'] == '' && $data['datefrom'] !=='' && $data['dateto'] =='' && $data['prepid'] =='' ){

            $country = country::where('sr_status','LIKE','%'.$data['status'].'%')
                    ->whereDate('created_at','>=',$data['datefrom'])
                    ->orderBy('sr_id')
                    ->get();

}elseif ($data['keyvalue'] == '' && $data['datefrom'] =='' && $data['dateto'] !=='' && $data['prepid'] =='' ){

            $country = country::where('sr_status','LIKE','%'.$data['status'].'%')
                    ->whereDate('created_at','<=',$data['dateto'])
                    ->orderBy('sr_id')
                    ->get();  

}elseif ($data['keyvalue'] == '' && $data['datefrom'] =='' && $data['dateto'] =='' && $data['prepid'] !=='' ){

            $country = country::where('sr_status','LIKE','%'.$data['status'].'%')
                    ->Where('prep_emp','LIKE','%'.$data['prepid'].'%')
                    ->orderBy('sr_id')
                    ->get();   
                    
}

如果所有输入值都已给出

elseif ($data['keyvalue'] !== '' && $data['datefrom'] !=='' && $data['dateto'] !=='' && $data['prepid'] !=='' ){ 

           $country = country::where('sr_status','LIKE','%'.$data['status'].'%')
                    ->whereDate('created_at','>=',$data['datefrom'])
                    ->whereDate('created_at','<=',$data['dateto'])
                    ->Where('sr_name','LIKE','%'.$data['keyvalue'].'%')
                    ->orWhere('tel_code','LIKE','%'.$data['keyvalue'].'%')
                    ->orWhere('country_code','LIKE','%'.$data['keyvalue'].'%')
                    ->orWhere('currency_name','LIKE','%'.$data['keyvalue'].'%')
                    ->Where('prep_emp','LIKE','%'.$data['prepid'].'%')
                    ->orderBy('sr_id')
                    ->get();
}

一切正常我只是想简化这段代码..

Answer 1

你可以这样做：

$country = null;

if ($value0 !== null) 
{
    $country = $country ?? Country::where('query0 here');
}
else if ($value1 !== null)
{
    $country = $country ?? Country::where('query1 here');
}
...
// end of your else ifs
// you do not need to check if all of the value exist because
// the query when all of the value exist and the partial value
// exist combined is just the same

$country = $country ?? $country->get();

Answer 2

您可以使用 when() 有条件的方法。

https://laravel.com/docs/8.x/queries#conditional-clauses

$countries = Country::when($request->filled('status'), function ($query) use ($request) {
    $query->where('sr_status', 'LIKE', "%{$request->input('status')}%");
})->when($request->filled('datefrom'), function ($query) use ($request) {
    $query->whereDate('created_at', '>=', $request->input('datefrom'));
})->when($request->filled('dateto'), function ($query) use ($request) {
    $query->whereDate('created_at', '<=', $request->input('dateto'));
})->when($request->filled('keyvalue'), function ($query) use ($request) {
    $query->Where('sr_name', 'LIKE', "%{$request->input('keyvalue')}%")
        ->orWhere('tel_code', 'LIKE', "%{$request->input('keyvalue')}%")
        ->orWhere('country_code', 'LIKE', "%{$request->input('keyvalue')}%")
        ->orWhere('currency_name', 'LIKE', "%{$request->input('keyvalue')}%");
})->when($request->filled('prepid'), function ($query) use ($request) {
    $query->where('prep_emp', 'LIKE', "%{$request->input('prepid')}%");
})->orderBy('sr_id')->get();

如何简化 if elseif 语句以从 laravel MySQL 数据库中获取特定的搜索数据

how to simplify if elseif statement to get particular search data from laravel MySQL database

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