Fix make sql filter case insensitive

Gemfile.lock

@@ -1,7 +1,7 @@
 PATH
   remote: .
   specs:
-    query_helper (0.3.6)
+    query_helper (0.3.7)
       activerecord (> 5)
       activesupport (> 5)
       sqlite3

lib/query_helper.rb

@@ -281,7 +281,7 @@ def search_filter(column_maps)
       placement = :where
       maps = column_maps.select do |cm|
         placement = :having if cm.aggregate
-        @search_fields.include? cm.alias_name
+        @search_fields.map(&:downcase).include? cm.alias_name.downcase
       end
       bind_variable = ('a'..'z').to_a.shuffle[0,20].join.to_sym
       @bind_variables[bind_variable] = "%#{@search_string}%"

lib/query_helper/sql_filter.rb

@@ -17,7 +17,7 @@ def create_filters
 
       @filter_values.each do |comparate_alias, criteria|
         # Find the sql mapping if it exists
-        map = @column_maps.find { |m| m.alias_name == comparate_alias }
+        map = @column_maps.find { |m| m.alias_name.downcase == comparate_alias.downcase }
         raise InvalidQueryError.new("cannot filter by #{comparate_alias}") unless map
 
         # create the filter

lib/query_helper/version.rb

@@ -1,3 +1,3 @@
 class QueryHelper
-  VERSION = "0.3.6"
+  VERSION = "0.3.7"
 end