For running J!5.1 you must https://fabrikar.com/forums/index.php?wiki/update-from-github/ or include the new file manually https://fabrikar.com/forums/index.php?threads/joomla-5-1-and-fabrik-cannot-find-files-error.54473/post-285151 See also Announcements
Please see our announcement here.
/**
* Validate the form
* modifies post data to include validation replace data
*
* @return bool true if form validated ok
*/
public function validate()
{
$input = $this->app->input;
print_r($input); // <<<----
die; // <<<----
[XXXXXXXX___Y_agreement_code] => Array ( [0] => 204 [1] => 204 [2] => 204 [3] => 204 [4] => 204 [5] => 204 [6] => 204 [7] => 204 [8] => 204 [9] => 204 )
[XXXXXXXX___Y_payments_provider_id] => Array ( [0] => 327 [1] => 414 [2] => 415 [3] => 542 [4] => 543 [5] => 325 [6] => 326 [7] => 416 [8] => 544 [9] => 545 )
[XXXXXXXX___Y_provider_id] => Array ( [0] => Array ( [0] => 280 [1] => 280 ) [1] => Array ( [0] => 304 ) [2] => Array ( [0] => 304 ) [3] => Array ( [0] => 304 ) [4] => Array ( [0] => 304 ) [5] => Array ( [0] => 304 ) [6] => Array ( [0] => 304 ) [7] => Array ( [0] => 304 ) [8] => Array ( [0] => 304 ) [9] => Array ( [0] => 304 ) )
[XXXXXXXX___Y_payment_type_id] => Array ( [0] => Array ( [0] => 15 [1] => 15 ) [1] => Array ( [0] => 1 ) [2] => Array ( [0] => 14 ) [3] => Array ( [0] => 14 ) [4] => Array ( [0] => 1 ) [5] => Array ( [0] => 10 ) [6] => Array ( [0] => 3 ) [7] => Array ( [0] => 2 ) [8] => Array ( [0] => 10 ) [9] => Array ( [0] => 3 ) )
[XXXXXXXX___Y_payment_value] => Array ( [0] => 93.30 [1] => 549.00 [2] => 794.96 [3] => 794.96 [4] => 549.00 [5] => 80.00 [6] => 2000.00 [7] => 40.00 [8] => 80.00 [9] => 2000.00 )
[XXXXXXXX___Y_payment_date] => Array ( [0] => 2016-11-03 00:00:00 [1] => 2016-12-02 00:00:00 [2] => 2017-08-16 00:00:00 [3] => 2017-08-16 00:00:00 [4] => 2017-09-02 00:00:00 [5] => 2017-09-16 00:00:00 [6] => 2017-09-16 00:00:00 [7] => 2017-09-16 00:00:00 [8] => 2017-09-16 00:00:00 [9] => 2017-09-16 00:00:00 )
[XXXXXXXX___Y_payment_term_id] => Array ( [0] => Array ( [0] => 4 [1] => 4 ) [1] => Array ( [0] => 4 ) [2] => Array ( [0] => 4 ) [3] => Array ( [0] => 4 ) [4] => Array ( [0] => 4 ) [5] => Array ( [0] => 1 ) [6] => Array ( [0] => 2 ) [7] => Array ( [0] => 4 ) [8] => Array ( [0] => 1 ) [9] => Array ( [0] => 2 ) )
[XXXXXXXX___change_time_stamp] => Array ( [0] => 2016-11-03 16:20:29 [1] => [2] => 2017-01-25 12:20:49 [3] => [4] => [5] => 2016-11-03 16:20:29 [6] => 2016-11-03 16:20:29 [7] => 2017-01-25 12:20:49 [8] => 2017-03-07 16:08:37 [9] => 2017-03-07 16:08:37 )
[XXXXXXXX___Y_payment_terms] => Array ( [0] => - [1] => - [2] => - [3] => - [4] => - [5] => - [6] => - [7] => - [8] => - [9] => - )
[XXXXXXXX___user_id] => Array ( [0] => Array ( [0] => 0 [1] => 0 ) [1] => Array ( [0] => 0 ) [2] => Array ( [0] => 0 ) [3] => Array ( [0] => 0 ) [4] => Array ( [0] => 0 ) [5] => Array ( [0] => 12 ) [6] => Array ( [0] => 0 ) [7] => Array ( [0] => 12 ) [8] => Array ( [0] => 0 ) [9] => Array ( [0] => 0 ) )
325 00170916-10 204 304 80.00 2017-09-16 1 10 - 2016-11-03 16:20:29 12
326 00170916-10 204 304 2000.00 2017-09-16 2 3 - 2016-11-03 16:20:29 0
327 00170916-10 204 280 93.30 2016-11-03 4 15 - 2016-11-03 16:20:29 0
414 00170916-10 204 304 549.00 2016-12-02 4 1 - 0000-00-00 00:00:00 0
415 00170916-10 204 304 794.96 2017-08-16 4 14 - 2017-01-25 12:20:49 0
416 00170916-10 204 304 40.00 2017-09-16 4 2 - 2017-01-25 12:20:49 12
419 00170916-10 204 280 12.00 2017-09-29 4 15 - 2017-01-25 12:32:59 0
542 00170916-10 204 304 794.96 2017-08-16 4 14 - 0000-00-00 00:00:00 0
543 00170916-10 204 304 549.00 2017-09-02 4 1 - 0000-00-00 00:00:00 0
544 00170916-10 204 304 80.00 2017-09-16 1 10 - 2017-03-07 16:08:37 0
545 00170916-10 204 304 2000.00 2017-09-16 2 3 - 2017-03-07 16:08:37 0
546 00170916-10 204 280 93.30 2016-11-02 4 15 - 2017-03-07 16:08:37 0