Redmine

In Redmine version 2.3.0, when you copy a project that the issues have custom fields, this fields aren't copied.

In a previous release of Redmine (2.1.2) this problem is resolved.
The solution could be the same that is explained in the issue #11315.
This issue is the same that issue #13518, but in redmine 2.3.0

This solution consist in:

• Modify the file app/models/issue.rb to add a call to a function to recalculate the custom fields
  • In tracker_id function:
    

    def tracker_id=(tid)
         self.tracker = nil
         result = write_attribute(:tracker_id, tid)
    -    @custom_field_values = nil
    +    recalculate_custom_field_values!
         result
    end
    

  • In project function
    

    def project=(project, keep_tracker=false)
        project_was = self.project
        write_attribute(:project_id, project ? project.id : nil)
        association_instance_set('project', project)
        if project_was && project && project_was != project
          (...)
    -      @custom_field_values = nil
    +      recalculate_custom_field_values!  
        end
    end
    
    

• Finally, add the new method in lib/plugins/acts_as_customizable/lib/acts_as_customizable.rb
  

  # Recalculate custom_field_values based on current available_custom_fields.
  # We need to make sure no extraneous custom_field_values are saved,
  # #custom_field_values= will only save values for custom fields available
  # to this object.
  def recalculate_custom_field_values!
    cfv_hash = custom_field_values.inject({}) {|h,cfv| h[cfv.custom_field.id] = cfv.value; h}
    reset_custom_values!
    self.custom_field_values = cfv_hash
  end
  

==========================

My Environment

Ruby version 2.0.0 (x86_64-linux)
RubyGems version 2.0.3
Rack version 1.4
Rails version 3.2.13
Active Record version 3.2.13
Action Pack version 3.2.13
Active Resource version 3.2.13
Action Mailer version 3.2.13
Active Support version 3.2.13
Environment production
Database adapter mysql2