hi i have the following which my logic tells me should not save if a
module with the same code is already saved in the database. Now when i
test it i can see that it is finding a matching code and entering into
the  if ($this->Module->find($conditions) statement, and i assume
therefore invalidating the code field. However it saves while as i was
reading in the manual it is not supposed to save after i set the
invalidate. so anyone knows what i might be doing wrong here? thanks

function admin_add() {
        if (empty($this->data)) {
            $this->render();
        } else {
            $this->cleanUpFields();
            $module = $this->data['Module']['code'];
            $conditions = array("Module.code"=>"$module");
            if ($this->Module->find($conditions)) {
                $this->Module->invalidate('code');
            }
            if ($this->Module->save($this->data)) {
                $this->admin_createReview($this->Module-
>getLastInsertId(), $this->data['Module']['code'],$this->data['Module']
['name'],$this->data['Module']['year_delivered']);
                $this->Session->setFlash('The Module has been saved
and an associated review created');
                $this->redirect('/admin/modules/index');
            } else {
                $this->Session->setFlash('Please correct errors
below.');
            }
        }
    }


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