Add a new fieldtype

[Hela_Guesmi]

Hello ,
i need to add a new field type ,
I create a new field type permille , I add permille in options of fieldtype in doctype Docfield

and i add the permille control

I can show the per mille field with symbol

but now when i save document d’ont add the permille field in database i modify the model.js and database/schema.py and i add permille but not save the field in data base where is the file can i modify to work store in mariadb

any help please

[Hela_Guesmi]

any help please

[szufisher]

refer to this https://gitee.com/yuzelin/zelin_link_multiselect/tree/master/zelin_link_multiselect/monkey_patches