Being a rails newbie, I appear to have hit a large wall.

I am trying to create an online gradebook using rails, where I and other teachers at my school can record students' grades for all their homework assignments.

students assessment1 assessment2 assessment3 -------- ----------- ----------- ----------- Bart Simpson 12 15 9 Lisa Simpson 7 6 14 Charlie Brown 12 14 17

I would like teachers to be able to dynamically add columns for new assessments as they occur, and understand that this is not such a simple task.

It is obvious that I need a join model in which to store the grades as there will be many students and many assignments, and each grade will be linked to both a specific assignment and specific student.

So I have written my models as follows:

1. class Student 2. has_many :gradations 3. has_many :assignments, :through => :gradations 4. end 5. class Gradation 6. belongs_to :student 7. belongs_to :assignment 8. end 9. class Assignment 10. has_many :gradations 11. has_many :students, :through => :gradations 12. end

So far so good right? Well I have since spent an infuriating amount of time fiddling about querying the models, and I can't for the life of me figure out how to pull out the data as in the table above. i.e. listing all the students' grades for each assignment. I wonder if there is somebody out there who can put me out of my misery. Or maybe I am barking up the completely wrong tree? Is there an easier way of doing this that I have totally overlooked?.. Please, somebody help me. I don't want to lose any more hair over this.

I have posted a more detailed picture of my dilemma at http://railspool.blogspot.com/