[RSS Feed/News] Saving data directly to db (not submitting it)

[XenForo]

I am trying to save data directly to db calling from the middle of another function (not by submitting process).
I can dump the data but it's not being saved. What's wrong? Is the filter related to new field or the incoming data?

Code:

public function createItem($data)
    {
        $item = $this->em()->create('My\Addon:Class');

        $input = $this->filter([
            'id'       => 'uint',
            'name'     => 'str',
            'qty'      => 'uint',
        ])...

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