CakePHP unable to save file to DB - Unknown column 'Array' in 'field list'

Question

I found a tutorial showing how to upload a file and store it in DB as blob. This is my code in FilesController :

$zip_file=$this->data['File']['zip'];
$fileData = fread(fopen($zip_file['tmp_name'], "r"), $zip_file['size']);

$this->data['File']['zip'] = $fileData;

$this->File->save($this->data);

getting this error upon execution:

Error: SQLSTATE[42S22]: Column not found: 1054 Unknown column 'Array' in 'field list'
SQL Query: INSERT INTO `my_db`.`files` (`task_id`, `zip`) VALUES (5, Array) 

Obviously it's the problem because $zip is an array. How to solve it?

---

DEBUG:

var_dump($this->data['File']); :

array (size=2)
   'task_id' => string '5' (length=1)
   'zip' => 
       array (size=5)
          'name' => string 'Vaja1.zip' (length=9)
          'type' => string 'application/x-zip-compressed' (length=28)
          'tmp_name' => string 'C:\wamp\tmp\php50B9.tmp' (length=23)
          'error' => int 0
          'size' => int 847624

Answer 1

Alright, found an answer - in short:

I had to replace every $this->data with $this->request->data and now it works.