Question

我想创建从MySql数据库中搜索数据的函数。我的搜索表单包含三个字段。进入这些领域的用户可以放一些文字/值或者不像正常的搜索形式.. 但是我遇到了一些问题 - laravel并没有回复我的任何价值观...... 我用：

Input::get('bus', 'Business.ID');

将用户插入的空值替换为每个值接下来在：

-> where('Business.ID', '=', $bus)

我尝试搜索值... 但不幸的是，它总是在我的json中返回空表..我怎样才能达到目标？我试过的整个代码和注释行

public function searchVoucher(){
    //$input = Input::all();
    // if(!isset($input['business'])){
    //  $bus = 'Business.ID';
    // }
    $bus = Input::get('bus', 'Business.ID');
    $company = Input::get('company', 'Companies.Comp_Name');
    $city = Input::get('city', 'Companies.City');
// SELECT * FROM Vouchers
// INNER JOIN Companies
// ON Vouchers.ID_Company = Companies.ID
// Inner JOIN Business
// on Companies.Business_Id = Business.ID
// where Business.ID = Business.ID

    $results = DB::table('Vouchers')
                //-> select('Vouchers.ID', 'URL as Url', 'Vou_Name as Name', 'Comp_Name', 'Discount', 'Quantity', 'Date')
                -> Join('Companies', 'Vouchers.ID_Company', '=', 'Companies.ID')
                -> Join('Business', 'Companies.Business_ID', '=', 'Business.ID')
                -> where('Business.ID', '=', $bus)  
                //-> whereRaw("Business.ID =$bus")// and Companies.Comp_Name =$company and Companies.City = $city")
                //-> whereRaw("Companies.Comp_Name =$company")
                -> where('Companies.Comp_Name', '=', $company)
                -> get();

    //if($results){
        return Response::json(['SearchList' => $results,'bus'=>$bus, 'success' => 1]);
    // }else {
    //  return Response::json(['SearchList'=>'No vouchers found', 'success'=>0]);
    // }            
}

Answer 1

你的问题在这里

Input::get('bus', 'Business.ID');
将用户插入的空值替换为下一个值：
-> where('Business.ID', '=', $bus)

您正在为输入定义默认值，因此此查询;

$results = DB::table('Vouchers')
  -> Join('Companies', 'Vouchers.ID_Company', '=', 'Companies.ID')
  -> Join('Business', 'Companies.Business_ID', '=', 'Business.ID')
  -> where('Business.ID', '=', $bus)  
  -> where('Companies.Comp_Name', '=', $company)
  -> get();

这可能是这样的：

$results = DB::table('Vouchers')
  -> Join('Companies', 'Vouchers.ID_Company', '=', 'Companies.ID')
  -> Join('Business', 'Companies.Business_ID', '=', 'Business.ID')
  -> where('Business.ID', '=', 'Business.ID')  
  -> where('Companies.Comp_Name', '=', 'Companies.Comp_Name')
  -> get();

这是你需要做的，增量查询：

$myQuery = DB::table('Vouchers')
    ->Join('Companies', 'Vouchers.ID_Company', '=', 'Companies.ID')
    ->Join('Business', 'Companies.Business_ID', '=', 'Business.ID');
if (Input::has('bus'))
{
    $myQuery = $myQuery-> where('Business.ID', '=', Input::get('bus'));
}
if (Input::has('company'))
{
    $myQuery = $myQuery> where('Companies.Comp_Name', '=', Input::get('company'));
}
if (Input::has('city'))
{
    $myQuery = $myQuery> where('Companies.City', '=', Input::get('city'));
}
$results = $myQuery->get();

您还可以将所有这些提取到雄辩的范围中，

从数据库中选择数据，选择任何行

1 个答案: