To integrate Crystal Reports in Ruby on Rails 2.3.8, you need to use a gem called "roware" (Ruby on Ware). This gem is a Ruby interface for working with SAP Crystal Reports, and it allows you to create, manipulate, and export reports from within a Ruby on Rails application.
You can install the gem by adding it to your Gemfile:
And then run bundle install to install the gem and its dependencies.
After installation, you can use the gem to create, modify, and export reports, for example:
report = ROWare::Report.new("path/to/report.rpt")
# modify the report
You can find more information and documentation on how to use the gem on the Github page: https://github.com/ejholmes/roware