gistfile1.rb

class Company
  include Mongoid::Document
  has_many :projects
end

class Project
  include Mongoid::Document
  has_many :project_zones
  has_many :incidents
  has_many_related :safety_inspectors
  has_one_related :safety_manager
  has_one_related :project_manager
  belongs_to :company, :inverse_of => :projects
end

class ProjectZone
  include Mongoid::Document
  belongs_to :project, :inverse_of => :project_zones
  belongs_to_related :zone
end

class Incident
  include Mongoid::Document
  belongs_to :project, :inverse_of => :incidents
  belongs_to_related :safety_issue
  belongs_to_related :safety_inspector
end

class SafetyCategory
  include Mongoid::Document
  has_many :safety_issues
end

class SafetyIssue
  include Mongoid::Document
  belongs_to :safety_category, :inverse_of => :safety_issues
end

class Zone < ActiveRecord::Base
end

class SafetyInspector < ActiveRecord::Base
end

class SafetyManager < ActiveRecord::Base
end

class ProjectManager < ActiveRecord::Base
end