Undefined method `find' for Project:Module

undefined method `find' for Project:Module error

  def find_projects
    user = Person.find(session[:userid])
   projects = Project.find(:all)
    set = []
    projects.each{ |project| set << project if
project.people.include?(user) }
    puts(set)
    return set
  end

This is my code and i get an error for projects 'find' only, not for the
person 'find'. I am moving to rails 3.2 from rails 2.3.5

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Solved: My project name was also Project., So there was a clash

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