Error: Call $page->setOutputFormatting(false) before getting/setting values that will be modified and saved.

[BFD Calendar]

I have a form (by Soma) to change information on a page - a tool lendout system, when someone returns a tool I fill in the return date and the page no longer shows in the lendout list. It worked perfect last semester, now out of the blue there's an error:

Error: Exception: Can't save page 3435: /en/lendout/1460370298/: Call $page->setOutputFormatting(false) before getting/setting values that will be modified and saved. [return_time] (in /home/mekanoinsa/www/wire/core/Pages.php line 1045)

#0 [internal function]: Pages->___save(Object(Page), Array)
#1 /home/mekanoinsa/www/wire/core/Wire.php(398): call_user_func_array(Array, Array)
#2 /home/mekanoinsa/www/wire/core/Wire.php(333): Wire->runHooks('save', Array)
#3 /home/mekanoinsa/www/wire/core/Page.php(1482): Wire->__call('save', Array)
#4 /home/mekanoinsa/www/wire/core/Page.php(1482): Pages->save(Object(Page), Array)
#5 /home/mekanoinsa/www/site/templates/lendout.php(84): Page->save()
#6 /home/mekanoinsa/www/wire/core/TemplateFile.php(182): require('/home/mekanoins...')
#7 [internal function]: TemplateFile->___render()
#8 /home/mekanoinsa/www/wire/core/Wire.php(398): call_user_func_array(Array, Array)
#9 /home/mekanoinsa/www/wire/core/Wire.php(333): Wire->runHooks('render', Array)
#10 /home/mekanoinsa/www/wire/modules

This is the form code:

// get a page
$editpage = $page;
$ignorefields = array("title","student_name","lendout_time","language_published");
$form = $modules->get("InputfieldForm");
$form->method = 'post';
$form->action = './';
// get the collection of inputs that can populate this page's fields
$inputfields = $editpage->getInputfields();
// make all the fields required and add them to the form
foreach($inputfields as $inputfield) {
    if(in_array($inputfield->name, $ignorefields)) continue;
    $form->add($inputfield);
}
// the inputfields don't already have a submit button, so we'll add one.
$submit = $modules->get("InputfieldSubmit");
$submit->name = "submit";
$submit->value = 'Submit';
// add the submit button the the form
$form->add($submit);
$out = '';
// process the form
if($this->input->post->submit) {
    // now we assume the form has been submitted.
    // tell the form to process input from the post vars.
    $form->processInput($this->input->post);
    // see if any errors occurred
    if( count( $form->getErrors() )) {
        // re-render the form, it will include the error messages
        $out .= $form->render();
    } else {
        // successful form submission, so populate the page with the new values.
        $editpage->setOutputFormatting(false);
        foreach($form as $field) {
            $editpage->set($field->name, $field->value);
        }
        // save it
        $editpage->save();
        $out .= "Page saved.";
        $out .= $form->render();
    }
} else {
    $out .= $form->render();
}

echo $out;

 

[godmok]

I have a similar problem. In my case I try to change a page and save a value from this page in the user profile. Here my code:
 

$u = $users->get(123456);
$u->setOutputFormatting( false );
$u->user_activation = true;

/**
  * get the only invoice and mark it paid
  * Payment if there is one invoice
  */
$invoices    = $pages->find( "template=invoice, user_select=$u->id" );
$invoice     = $invoices->first();

if ( count( $invoices ) === 1 && $invoice->id ) {
   $invoice->setOutputFormatting( false );

   if ( $invoice->payment_rate === (float) $input->get->amt ) {
        /**
          * ERROR occurs if reloading the page with changed value (true/false)
          * set $u->setOutputFormatting( false ) later before the pass
          */
        $invoice->user_activation = true;
        $invoice->save();

        $u->payment_rate = $invoice->payment_rate;
    }
}
$pass     = activationAndPassCode();
$u->setOutputFormatting( false ); // have to set it again, without it will create an error
$u->pass = $pass;
$u->save();

My error message was similar but there was:

... modified and saved. [pass] ...

The only fix I could made for now is to put $u->setOutputFormatting(false) again before changing the password ($u->pass = $pass), even if was set in first line.

Weird behaviour on my side was: after the first time the error was shown it disappeared after the second. It triggered only on the change of $invoice->user_activation = true|false. So if the value changed in $invoice->user_activation it could not run without the error.

Maybe it helps to set you to set setOutputFormatting(false) before your change on the field "return_time" as the error hints to it.