Make sure slashes are properly escaped in the search query.

CHANGES.txt

@@ -4,6 +4,11 @@ Changelog
 4.0 - unreleased
 ------------------
 
+- Make sure slashes are properly escaped in the search query. Solr 4.0 added
+  regular expression support, which means that '/' is now a special character
+  and must be escaped if searching for literal forward slash.
+  [timo]
+
 - Implement the getDataOrigin method for the FlareContentListingObject that
   plone.app.contentlisting defines and that plone.app.search expects to exist.
   [timo]

src/collective/solr/search.py

@@ -95,7 +95,12 @@ class Search(object):
             elif not value:     # solr doesn't like empty fields (+foo:"")
                 if not name:
                     continue
-                logger.info('empty search term form "%s:%s", aborting buildQuery' % (name,value))
+                logger.info(
+                    'empty search term form "%s:%s", aborting buildQuery' % (
+                        name,
+                        value
+                    )
+                )
                 return {}
             elif field.class_ == 'solr.BoolField':
                 if not isinstance(value, (tuple, list)):
@@ -135,6 +140,11 @@ class Search(object):
                             value = '"%s"' % value
                 else:
                     value = quote(value)
+                    # Solr 4.0 added regular expression support, which means
+                    # that '/' is now a special character and must be escaped
+                    # if searching for literal forward slash.
+                    if '/' in value:
+                        value = value.replace('/', '\/')
                 if not value:   # don't search for empty strings, even quoted
                     continue
             else: