Q:

Satchmo donations

Can anyone share some pointers on building a Donations module for Satchmo?  I'm comfortable customizing Satchmo's product models etc but unable to find anything related to Donations
I realize it's possible to create a Donations virtual product but as far as I can tell this still requires setting the amount beforehand ($5, $10 etc).  I want users to be able to donate arbitrary amounts

A:

It looks like the satchmo_cart_details_query signal is the way to go about doing this.  It allows you to add a price change value (in my case, donation amount) to a cart item
I'll post the full solution if anyone is interested

