Hallo,

I am new to SilverStripe, and try to code a simple ``callcenter'' page, where calls can be stored and viewed.
The Version of SilverStripe is 3.1.8., and I worked through the tutorials.
To save formdata into the db is handled in tutorial #3, and I thought, I did everything like it is said there,
but the when I submit the data, i just get an empty form as a result, and nothing is written to the db.

Here is my code:

InsertPage.php

<?php
	class InsertPage extends Page
	{
	}
	
	class InsertPage_Controller extends Page_Controller
	{
		private static $allowed_actions = array('insertCall');
		
		public function insertCall()
		{
			$fields = new FieldList(
					new TextField('telefone', 'Telefonnummer')
					, new TextField('name', 'Name')
					, new TextareaField('subject', 'Betreff')
					, new TextareaField('note', 'Anmerkung')
					, new TextField('date', 'Datum', date('d.m.Y', time()))
					, new TextField('time', 'Uhrzeit', date('H:m', time()))
					, new HiddenField('createDate')
					, new HiddenField('createUser')
					, new HiddenField('assignedAgent')
					, new HiddenField('isProcessed')
					, new DropdownField('agent', 'Verantwortlicher', array('heinz' => 'Heinz', 'uwe' => 'Uwe', 'karl' => 'Karl', 'henrette' => 'Henriette', 'walter' => 'Walter', 'eva' => 'Eva'))
					, new DropdownField('topic', 'Thema', array('order' => 'Bestellung', 'info' => 'Information', 'offer' => 'Angebot', 'private' => 'Privat'))
			);
			
			$actions = new FieldList(
					new FormAction('doInsertCall', 'Eintragen')
			);
			
			return new Form($this, 'insertCall', $fields, $actions);
		}
		
		public function doInsertCall($data, $form)
		{
			$submission = new insertCallSubmission();
			$submission->write();
			$form->saveInto($submission);
			$submission->write();
			
			return $this->redirectBack();
		}
	}
?>

insertCallSubmission.php:

<?php
	class insertCallSubmission extends DataObject
	{
		private static $db = array(
				'telefone' => 'Varchar'
				,'name' => 'Varchar'
				,'subject' => 'Text'
				,'note' => 'Text'
				,'date' => 'Date'
				,'time' => 'Time'
				,'createDate' => 'SS_Datetime'
				,'createUser' => 'Varchar'
				,'assignedAgent' => 'Varchar'
				,'isProcessed' => 'Varchar'
				,'agent' => 'Varchar'
				,'topic' => 'Varchar'
		);
	}
?>

What am I missing?
Thanks in advance for your help.

I copied your code, and it works. In the template, you need to put "$insertCall" -- this will render the form. Upon submission, it does save to the database. I have confirmed this by examining the table:

mysql> select telefone, name, subject from insertCallSubmission;
+----------+------------+---------+
| telefone | name       | subject |
+----------+------------+---------+
| 123      | Fred Condo | Fish    |
+----------+------------+---------+ 

The reason that you go back to the blank form is that you have explicitly requested this by calling $this->redirectBack().

You can display a confirmation by changing the last statement of doInsertCall to this:

return $this->customise(['insertCall' => 'Vielen Dank. Wir haben Ihre Daten erhalten haben.']);

Thanks a lot for your answere Fred, but this seems to be no Form Question anymore.
I tried again to insert data with the form, and after an apache restart, it worked.
But after I searched the internet for validation in SilverStripe, and added required fields
it stopped working again, even when I removed the new code.
I have all PHP modules installed, that are required, and found nothing in the error.log.
The error must be somewhere else.

I am also facing the problem. If you know the answer please reply me.

Please post your PHP and template code somewhere where others can view it, such as http://sspaste.com or in a Github gist.