Integrate with the Flag module

Yeah, check out http://www.drupalcommerce.org/node/49. A product's definition isn't content. A product display is content. Regardless, Flag should work with any entity type, not just nodes.

Having taken a look at #1035410: Flag any entity, I reckon that because product entities don't have a direct view page but just a form, we're going to need so do some extra integration to get the flag widget into the product form.

Just a bit of maintenance on the title / tags.

I'm working on this at the moment.

Blocker: #1689538: product form has entity ID as '' rather than NULL.

Should all be working now.

After a morning' hacking, I've found out that you can make this happen by embedding flag_create_link('flag_name',$product_id) in a hook_form_alter for whatever add to cart form you're using. It ain't elegant, but it works!
In future, I imagine it'll be a matter of placing a more elegant version of this code in the hook_widget_view of the flag module's add to cart form.
Peace
Sam B

I am using Display Suite in the product display. How can I put a flag link so that when the user uses the link, he flags a product variation (entity) instead of node?

@Sam B, can you please share how do you get the product_id?

I wrote a way to use Flag with the product displays here: #1911568: How is this module different from Flag module?