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ModelAdmin: Random Value for TextField when Creating new Object
18 November 2010 at 1:31pm
hi,
i am trying to generate a random string value when i open a new Object in ModelAdmin. (Create ObjectXY)
i use getCMSFields to remove the Field from the Tab, Generate a Random String and want to add the Field again with the Random Value.
but when i add the field again like that:
$f->addFieldToTab('Root.Main',new TextField('Code','PromoCode',$randomUniqueCode));
.. the textfield stays empty
here´s my full getCMSFields function:
function getCMSFields(){
$f = parent::getCMSFields();$f->removeFieldFromTab('Root','Code');
//generate code first time
$randomUniqueCode = $this->generateRandomCode(10);$existingCodes = DataObject::get('PromoCode');
if(count($existingCodes)){
foreach($existingCodes as $code){
if($randomUniqueCode == $code->Code)
$randomUniqueCode = $this->generateRandomCode(10);
else
break;
}
}if($this->ID == 0)
$f->addFieldToTab('Root.Main',new TextField('Code','PromoCode',$randomUniqueCode));
else
$f->addFieldToTab('Root.Main',new TextField('Code','PromoCode',$this->Code));return $f;
}thanks for your help in advance
matze -
Re: ModelAdmin: Random Value for TextField when Creating new Object
18 November 2010 at 2:53pm
You'll want to use the populateDefaults method. Something like:
public function populateDefaults() {
parent::populateDefaults();
do {
$this->Code = $this->generateRandomCode(10);
} while(DB::Query('SELECT COUNT("ID") FROM "PromoCode" WHERE "Code" = \'' . $this->Code . '\' LIMIT 1')->value());
} -
Re: ModelAdmin: Random Value for TextField when Creating new Object
18 November 2010 at 3:01pm
thanks a lot. that did the trick!
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