Using a regex to parse dates instead of attempting to parse and getti…

…ng exception

lib/mongoid/parsers/date_time_parser.rb

@@ -2,12 +2,14 @@ module Mongoid
   module QueryStringInterface
     module Parsers
       class DateTimeParser
+        DATE_REGEX = /^(?:\d{4}-\d{2}-\d{2}|\d{4}-\d{1,2}-\d{1,2}[T \t]+\d{1,2}:\d{2}:\d{2}(\.[0-9]*)?([ \t]*)(Z?|[-+]\d{2}?(:?\d{2})?))$/
+
         def parseable?(value, operator)
-          not parse(value).nil?
+          DATE_REGEX.match(value)
         end
 
         def parse(value)
-          value.to_time and Time.parse(value)
+          Time.parse(value)
         rescue Exception
           nil
         end

spec/mongoid/parsers/date_time_parser_spec.rb

@@ -1,27 +1,31 @@
 require 'spec_helper'
 
 describe Mongoid::QueryStringInterface::Parsers::DateTimeParser do
-  it "should be able to parse a valid date" do
-    should be_parseable('20101010', nil)
-  end
-
-  it "should be able to parse a valid date time" do
-    should be_parseable('2010-10-10T10:50:30', nil)
-  end
-
   it "should not be able to parse a text" do
     should_not be_parseable('Anything else', nil)
   end
 
   it "should not be able to parse an invalid date format" do
     should_not be_parseable('20:asd:200 20/1/300', nil)
   end
+
+  SAMPLE_DATES = [
+    "2010-10-10",
+    "2010-10-10T10:50:30",
+    "2010-10-10T10:50:30Z",
+    "2010-10-10T10:50:30-03:00",
+    "2010-10-10T10:50:30 -03:00",
+    "2010-10-10T10:50:30-0300",
+    "2010-10-10T10:50:30 -0300"
+  ]
 
-  it "should parse a valid date" do
-    subject.parse('20101010').should == Time.parse('20101010')
-  end
-
-  it "should parse a valid date time" do
-    subject.parse('2010-10-10T10:50:30').should == Time.parse('2010-10-10T10:50:30')
+  SAMPLE_DATES.each do |time|
+    it "should be able to parse #{time}" do
+      should be_parseable(time, nil)
+    end
+
+    it "should parse #{time}" do
+      subject.parse(time).should == Time.parse(time)
+    end
   end
 end