add model param to query generator

lib/text_to_sql_query.rb

@@ -15,10 +15,11 @@ class TextToSqlQuery
     end
   end
 
-  def where_clause
+  def where_clause(model)
     @parser = Query.new
     @parsed_tree = @parser.parse(@text)
-    generate_sql @parsed_tree
+    generated_sql = generate_sql @parsed_tree
+    model.where generated_sql
   end
 
   private