Fix search solr with special char

app/services/solr_service.rb

@@ -5,7 +5,10 @@ class SolrService
   def self.search(params={})
     params[:page] ||= 1
     keyword = params[:keyword] || ""
-    keyword = keyword.gsub("^", "").gsub(":", "").gsub("(", "").gsub(")", "")
+    ['+', '-', '&&', '||', '!', '(', ')', '{', '}', '[', ']', '^', '"', '~', '*', '?', ':', '\\'].each do |s|
+      keyword = keyword.gsub(s, " ")
+    end
+
     solr = RSolr.connect :url => ENV["solr_url"]
     res = solr.paginate params[:page], ENV["default_perpage"], 'select', :params => {:q => "*#{keyword}*"}
     res["response"]["docs"]