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  • Business Rules!

This project rocks and uses MIT-LICENSE.

Gemfile

gem 'business_rules', github: "deevis/business_rules", branch: "master"

Command Line

bundle install

rake rules_engine:install:migrations

RULES_DISABLED=true rake db:migrate

rails server

config/application.rb

  require 'rules/engine'

    config.autoload_paths += %W(#{Rules::Engine.root}/lib/)

routes.rb

  mount Rules::Engine => '/rules'

application.js

//= require business_rules/rules

application.css

*= require business_rules/rules

views/layouts/application.html

<head>
<%= content_for :rules_javascript %>
</head>

<body>
<%= render 'rules/shared/web_actions' %>
</body>

config/initializers/rules.rb

Rules.setup do |config|
  # Automatically add ModelEventEmitter to all ActiveRecord classes
  config.active_record = true

  # Scan for models to eagerly load in development mode
  config.development_model_paths << "app/models/**/*.rb"

  # config.event_processing_strategy = :synchronous, :redis
  config.event_processing_strategy = :synchronous

  config.context_mapping_equivalencies = { messaging_user: [:user, :string],
                                           object: [:user, :string],
                                           user: [:sender] }

  # config.current_user = -> {Thread.current[:rules_user]}

  config.instance_lookups[:messaging_user] = {  "User" => {
                                                  search: [:email],
                                                  display: '"[#{email}]"'
                                                }}

  config.instance_lookups[:user] = {  "User" => {
                                                  search: [:email],
                                                  display: '[#{email}]"'
                                                }}

  config.system_messaging_user = "noreply@#{ActionMailer::Base.default_url_options[:host]}"

  # config.event_extensions = ->(h) { h[:agency_id] = Agency.current.try(:id); h }

  # config.rule_context_around = ->(event_hash, &block) { a = Agency.find(event_hash[:agency_id]); Agency.with(a) { block.call if block} }

  # config.redis_host, config.redis_port = ["localhost", 6379]
  # config.redis_queue_name = "rules_events"

end


# Add middleware to make Redirect Rules work
require 'rules/all'
require 'rules/middleware/redirect_rule'

Rules.activate_event_processing #unless Rails.env == "test"
Rails.configuration.middleware.use "Rules::Middleware::RedirectRule"

# Add tasks, notifications to your User object
User.class_eval do |klazz|
  klazz.has_many :tasks, class_name: "Rules::Task"
  klazz.has_many :notifications, class_name: "Rules::Notification"
end

app/controllers/application_controller.rb

  around_action :rules_user

  private
    def rules_user
      Thread.current[:rules_user] = current_user
      yield
    rescue => e 
      Rails.logger.error e.message 
      Rails.logger.error e.backtrace.join("\n")
    ensure
      Thread.current[:rules_user] = nil
    end