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copied!<p>I eventually found a solution searching more deeply into Stackoverlow :</p> <p>This blog post explains the problem and gives a working solution : <a href="http://blog.nominet.org.uk/tech/2007/06/14/date-and-time-formating-issues-in-ruby-on-rails/" rel="nofollow">http://blog.nominet.org.uk/tech/2007/06/14/date-and-time-formating-issues-in-ruby-on-rails/</a> </p> <p>So we have : <em>lib/column-patch.rb</em></p> <pre><code>class ActiveRecord::ConnectionAdapters::Column def self.string_to_date(string) return string unless string.is_a?(String) begin return DateTime.strptime(string, ActiveSupport::CoreExtensions::Date::Conversions::DATE_FORMATS[:default]) rescue date_array = ParseDate.parsedate(string) # treat 0000-00-00 as nil Date.new(date_array[0], date_array[1], date_array[2]) rescue nil end end def self.string_to_time(string) return string unless string.is_a?(String) begin if dt=Date._strptime(string,ActiveSupport::CoreExtensions::Time::Conversions::DATE_FORMATS[:default]) return Time.mktime(*dt.values_at(:year, :mon, :mday, :hour, :min, :sec, :zone, :wday)) else raise "Bad format" end rescue time_hash = Date._parse(string) time_hash[:sec_fraction] = microseconds(time_hash) time_array = time_hash.values_at(:year, :mon, :mday, :hour, :min, :sec, :sec_fraction) # treat 0000-00-00 00:00:00 as nil Time.send(ActiveRecord::Base.default_timezone, *time_array) rescue DateTime.new(*time_array[0..5]) rescue nil end end end </code></pre> <p>And we add in <em>config/environment.rb</em></p> <pre><code>require 'column-patch' </code></pre>

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