Laravel如何从两个不同的数据库中检索匹配数据

Question

I am new to laravel.I have two DB results which are stored in 2 different variables.But i want to know how matching records are fetched from these 2 results.

$cRes = ModelA::all();
$sRes  = ModelB::orderBy('created_at','desc')->paginate();
$data = $sRes->cRes->pluck('name') ;

Result of $sRes

  $sRes=Array( [id] =>1,
           [name] =>TEST1);

Result of $cRes

$cRes = Array([id] => 4,
              [name] => PHP);

Final result

  $data = PHP

I want to how $data is retrieved

Answer 1

Make a relationship between ModelA & ModelB

In Model A:

function modelb(){
    ...
}

In Model B:

function modela(){
    ...
}

Then in query

$data = ModelA::with('modelb')->select('name')->get();