Laravel check for constraint violation

Question

I was curious if there is a way we can check if there is a constraint violation error when delete or insert a record into the database.

The exception thrown is called \'

Answer 1

first put this in your controller

use Exception;

second handle the error by using try catch like this example

try{    //here trying to update email and phone in db which are unique values
        DB::table('users')
            ->where('role_id',1)
            ->update($edit);
        return redirect("admin/update_profile")
               ->with('update','update');
            }catch(Exception $e){
             //if email or phone exist before in db redirect with error messages
                return redirect()->back()->with('phone_email','phone_email_exist before');
            }

New updates here without need to use try catch you can easily do that in validation rules as the following code blew

public function update(Request $request, $id)
{
    $profile = request()->all();
    $rules    = [
            'name'                       => 'required|unique:users,id,'.$id,
            'email'                      => 'required|email|unique:users,id,'.$id,
            'phone'                      => 'required|unique:users,id,'.$id,
    ];
    $validator = Validator::make($profile,$rules);
    if ($validator->fails()){
        return redirect()->back()->withInput($profile)->withErrors($validator);
    }else{
        if(!empty($profile['password'])){
            $save['password'] = bcrypt($profile['password']);
        }
        $save['name']                  = $profile['name'];
        $save['email']                 = $profile['email'];
        $save['phone']                 = $profile['phone'];
        $save['remember_token']        = $profile['_token'];
        $save['updated_at']            = Carbon::now();

        DB::table('users')->where('id',$id)->update($save);
        return redirect()->back()->with('update','update');
    }
}

where id related to record which you edit.