如何解决此错误传递给 Illuminate\Database\Grammar::parameterize() 的参数 1 必须是数组类型，字符串给定

Question

我在尝试通过将用户输入与数据库中的数据进行比较来获取 ID 时遇到了这个问题。我是新手，我尝试了一些根本没有帮助的解决方案。

下面是我的控制器代码：

public function assign(Request $request)
  {
        $courselist = new Courselist;
        
        $coursecode = $request->input('coursecode'); 
        $courseid = DB::select("select id from course where course_code = '$coursecode'");
        
        $courselist -> course_id = $courseid;
        $courselist -> coordinator = $request->input('coordinatorname');
        $courselist -> internal = $request->input('imname');
        $courselist -> external = $request->input('exname');
        $courselist -> dean = $request->input('deanname');
        $courselist -> save();
        
        return back()-> with('alert-success','Data successfully added!');   
  }

Answer 1

$course = DB::table("your table name")->where("course_code ", "=", $coursecode)->first();

$courselist -> course_id = $course->id;

尝试一下，希望它能奏效。

如何解决此错误传递给 Illuminate\Database\Grammar::parameterize() 的参数 1 必须是数组类型，字符串给定

how to solve this error Argument 1 passed to Illuminate\Database\Grammar::parameterize() must be of the type array, string given

insert

laravel