Hey, so we are modifying the recurring contract module and have a slight snag.

We have the model for the header of the document which contains the customer.

Then we have a model for all the lines for that contract.

We want to be able to get data from the header model into the line model so we can use domain to filter what products can be seen based on the customer that is selected.

How can this be done? Thanks,

We have tried creating a field that relates to the parent document on the line model however this is unsuccessfull. Tried using context and domain  but got nowhere.