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first of all, sorry for my english, I’m French!
I would like to upload a second image when I create a new Category.
How I can do that?
I’ve tried to add an attribute in categorie’s attribute set, but no success!
So I decided to add a new field in the database, but I am lost with all the links I have to do! (in the code and in the database)
The categories use entities and attrbiutes.
You need to create a new entity for categories (for example: category_second_image).
After you create de entity and associate with categories, you can look that new entity/field in your categories form.
Take a look with that, find how Magento implements the others categoiry fields and copy & paste. (Lol).
Let me know if you can add your field… I made that modification and I think that I got some document somewhere.