I am creating a module and I want to use many2one field to many a selection field.
How can I control whcih column to get from other table?
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I think this piece of documentation will clear up a lot for you:
https://doc.odoo.com/trunk/server/03_module_dev_02/#relational-types
[EDIT]
If you only want specific data from the other object, add a domain to the field.
Willie, if I understand you correctly you want to understand where the Value that is used for many2one field is taken from.
Technically it is taken from an ORM method called _name_get which will return a list of tuple pairs containing the database ID and the value to display. Now, if you don't change anything on the _name_get method, the default is that it will display whatever is in the column named "name" or (if any) column specified in the _rec_name attribute of the ORM.
Hope this help.
