I have created custom address attribute "extension" as varchar type through InstallData. I have also added Extension field in customer registration form. Since I want customers to enter some value during customer registration.
The Problem is I can able to get the data in request params of the customer registration request. But the value is not getting stored in customer_address_entitiy_varchar table
I even tried setting post value in customer registration request by
But above method also fails and i could not save custom address entity.
Can someone guide me, what else I need to do ?