In Yii2 how to do insert in 2nd table relations?

There is a table tab1 and tab2, I can not find an example of maintaining a data link with fk, how to save such data?

UPD: Preferably using transactions.
July 9th 19 at 13:59

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July 9th 19 at 14:01
Apparently you were looking for it
https://github.com/yiisoft/yii2/blob/master/docs/g...

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