FIX: a search term containing '& could lead to errors

This also makes sure that the search term in front or after special characters isn't ignored.

lib/search.rb

@@ -832,8 +832,8 @@ class Search
     ts_config = ActiveRecord::Base.connection.quote(ts_config) if ts_config
     all_terms = data.scan(/'([^']+)'\:\d+/).flatten
     all_terms.map! do |t|
-      t.split(/[\)\(&']/)[0]
-    end.compact!
+      t.split(/[\)\(&']/).find(&:present?)
+    end.reject!(&:blank?)
 
     query = ActiveRecord::Base.connection.quote(
       all_terms

spec/components/search_spec.rb

@@ -945,12 +945,18 @@ describe Search do
     end
   end
 
+  context '#ts_query' do
     it 'can parse complex strings using ts_query helper' do
       str = " grigio:babel deprecated? "
       str << "page page on Atmosphere](https://atmospherejs.com/grigio/babel)xxx: aaa.js:222 aaa'\"bbb"
 
       ts_query = Search.ts_query(term: str, ts_config: "simple")
-    DB.exec("SELECT to_tsvector('bbb') @@ " << ts_query)
+      expect { DB.exec("SELECT to_tsvector('bbb') @@ " << ts_query) }.to_not raise_error
+
+      ts_query = Search.ts_query(term: "foo.bar/'&baz", ts_config: "simple")
+      expect { DB.exec("SELECT to_tsvector('bbb') @@ " << ts_query) }.to_not raise_error
+      expect(ts_query).to include("baz")
+    end
   end
 
   context '#word_to_date' do