I’ve been working on a project that leverages ApacheSolr for many of the displays on the site. One of the requirements is that every instance of a taxonomy term link on the site needs to point to search results pre-filtered (using FacetAPI) on the term. The other requirement is that if a taxonomy term’s vocabulary doesn’t have an associated search facet, the user should end up on the search page with results as if the user had searched for the term’s name in the search text box.

1. If you see a “Climate Change” term (tid = 153) link from the “Topics” vocabulary (vid = 8), it should render as  <a href="/search/site?f[0]=im_field_tr_topics%3A153">Climate Change</a> in the DOM.
2. If you see a “Blog” term (tid = 123) link from the “Keywords” vocabulary (vid = 6), it should render as  <a href="/search/site/blog">Blog</a> in the DOM.