CODEWITHSUNDEEP
phpsilverstripe
DAMIEN JIANG
DAMIEN JIANG

Reputation: 673

How can I get the parent element property before I save and published the children element in Silverstripe Elemental?

I am having a little problem using silverstripe elemental. I am trying to get some parent element property in a children element, but only after I save and published the children element, the parent element property becomes available.

For example, I want to get the QuizQuestion element property QuestionNumber = 2 in children element QuizAnswer, but I only get a default value QuestionNumber = 0 in the database.

When I Debug::show($this->QuizQuestion()->QuestionNumber), I can see it is indeed 2. How can I get the parent element property before I save and published the children element?

Upvotes: 3

Views: 379

Answers (2)

wilr
wilr

Reputation: 318

The parent record should be available at this time. Make sure you call the parent method first.

Under the hood, elemental simply uses GridField so you can search for any GridField related documentation to understand this better. 

public function onBeforeWrite()
{
    parent::onBeforeWrite();

    // $this->List(); // Obj(ID = 2);
}

Upvotes: 1

csy_dot_io
csy_dot_io

Reputation: 1199

I don't know now this module but normally you should be able to get the parent id out of the current url. It's very hacky but should work for you.

public function ItemByUrl() {
  $uri = explode('/', $_SERVER['REQUEST_URI']);
  $i = array_search('IDENTIFIER', $uri);

  if(isset($uri[$i+PARTS])) {
    $itemID = $uri[$i+PARTS];
    $item = DATAOBJECTCLASS::get()->byID($itemID);
    if($item) {
      return $item;
    }
  }
}

So if your URL is something like that

admin/.../EditForm/field/ParentDataObject/item/67/ItemEditForm/field/ChildDataObject/item/new

And you want to get the ParentID 67

IDENTIFIER would be "ParentDataObject"

PARTS would be "2"

and DATAOBJECTCLASS would be "ChildDataObject"

Upvotes: 1

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