Single association through multiple sources

at first i thought this might be an easy solution but then i realized that there is a hmt association with users/jobs/projects and that makes things more difficult.

I will however suggest a change and see if this works for you. assuming a job is something like "tester", "developer", etc., why not make "lead" a job as well and remove the lead_id from the project altogether?

that would leave you with:

class Project < AR::Base   has_many :jobs end

class Job < AR::Base   belongs_to :project   belongs_to :user end

class User < AR::Base   has_many :jobs   has_many :projects, :through => :jobs do     def by_jobname(jobname)       find(:all, :conditions => ["jobs.name = ?", jobname])     end

    def lead       find(:all, :conditions => "jobs.name = 'lead'")   end end

then you can use the above association extensions like so:

u = User.find(...)

u.projects # => all projects in which the user has a job u.projects.by_jobname('developer') # => all projects where user has a developer job u.projects.lead # => all projects where user has a lead job

you could even do the same with projects to find users based on job.

see: ActiveRecord::Associations::ClassMethods

section on association extensions for more info.

hope this helps

Chris