JasperReports/Rails integration using Rjb (Ruby Java Bridge)
- jasper-rails 2.0.0.beta1 released!
You need a Java Virtual Machine installed and set up in order to use this gem.
gem install jasper-rails
jasper-rails to your Gemfile:
Note: If you're running your application on OS X, this is usually all you have to do. On Linux, you might have to set the JAVA_HOME. On Windows, good luck!
For any issues related to the java/ruby integration, please check out: http://rjb.rubyforge.org/. You will find here plenty tips that might help you to solve your problem.
- Tell your controller that it "responds to" :pdf and it "responds with" some list:
Note: This list will become your datasource inside the report.
respond_to :html, :xml, :pdf def index @people = Person.all respond_with @people end
Create your jasper report source file using iReport or any compatible jasper tool.
Set the "Query Text" and "The language for the dataset query" properties of your report.
Note: If you're using iReport, you can find those properties in the "Properties panel". Don't forget to select the report root node in your "Report inspector".
Example: If you have a list of people, you should have something like:
- "Query Text" = /people/person
- "The language for the dataset query" = xpath
Design your report (add fields, groups, images, etc.)
Save the report source file in your views folder (just like any other html view file):
def index @people = Person.all # This variable will be available in your report! @user = "John Doe" respond_with @people end
All you have to do now is to create, in iReport, a parameter called "user" (yes, without the "@") and drop it in your report!
Limitation: By now, all parameters that aren't manually converted to Rjb java classes/instances are converted to java String. We intend to change this in the near future.
Passing Java parameters directly
title = (Rjb::import 'java.lang.String').new("The Beatles") @parameter_that_is_a_java_class = (Rjb::import 'java.util.HashMap').new @parameter_that_is_a_java_class.put("title", title)
For more information check out issue: #13
You can change any default report param by setting JasperRails.config[:report_params], e.g., in your "config/application.rb" you might have something like:
config.after_initialize do JasperRails.config[:report_params]["REPORT_LOCALE"] = JasperRails::Locale.new('pt', 'BR') end
Check out: jasper-rails-rspec.
For a running example, just clone: jasper-rails-demo.
For any discussion related to this gem, feel free to join the mailing list.
This project was first developed at Grupo Fortes in 2011 and we have been using it in several projects since then. Pay attention that all the features it supports right now were based in those project's especific needs. Therefore you might find a lot of JasperResports' features that are not yet supported.
Copyright (C) 2012 Marlus Saraiva, Rodrigo Maia
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