Display Looping Input File from database using Laravel on select dropdown

I have a dropdown. I want to show the loop input files from the database by selecting the dropdown.

Detail of the case: if I choose one dropdown, it will show input_file derived from table loop_atachment (doctype column) based on groupid selected.

image database here

This is my code.

Dropdown in blade :

<select id="groupid" name="groupid" class="form-control">
    <option value="">Choose</option>
    <option value="1">General</option>
    <option value="2">Golf Club</option>
</select>

Input file should be display here when select dropdown:

<div class="form-group">
  <label class="control-label">loop attachment</label>
   
</div>

Javascript/ajax :

 $('#groupid').on('change', function(){
    $.post('', {type: 'loop_attachment', id: $('#groupid').val()}, function(e){
        $('#image').html('');
        $('#image').html(e);
        });
    });

Controller :

public function postDynamic(Request $request) 
{
    switch(Input::get('type')):
        case 'loop_attachment':
            $return = '<input type="file" id="">';
            foreach(Loop_attachment::where('groupid', Input::get('id'))->get() as $row) 
                $return .= "<input type='file' id='$row->id'>$row->doctype";
            return $return;
        break;
    endswitch;       
}

Currently, does not display any file input when selecting the dropdown, I hope anyone can help me here. Thanks in advance

via Chebli Mohamed