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In OpenERP v8 in the website modules and ecommerce modules Can we link attributes to be displayed on specified product categories?
For example, having a computer and their accessories shop, I don't want to display a printer cartridge specifications among CPUs and RAMs for PCs and Laptops.
There is now a module available, check https://www.odoo.com/apps/modules/8.0/website_product_attribute_category/!
In short, NO, not yet.
I have raised this issue with some of the members of the Odoo Sales team - as you have identified - because the attributes filter list is NOT currently built by looking at the available attributes of the current category the attributes filter always shows ALL attributes and ALL attribute values for ALL products.
This means that many or most of the attributes listed in the attribute filter are irrelevant, and will yield zero results if the user selects them from within a specific product category. To be useful the list of attributes needs to reflect the category that has been selected, or as you point out, you will get attributes offered from products in completely different categories
Consequently the attribute filter and attributes system, as it currently works, is not particularly useful to store owners. I have requested that Odoo SA look at improving this as soon as possible, and the more people that request this the greater the chance that it may be changed, if ever.
It obviously be useful to have a "smart" faceted navigation; when you first get a page for each category and then you have only de attributes the customer may need. Is there any development in this point?
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Karma doesn't allow me to comment, so I have to answer. Are there any news on this very hot topic? As Kurt pointed out, this essential lack makes E-commerce with a broader range of products impossible.