Models distance in terms of associations

Hi, I was wondering if there's a way to know the associations needed to reach a model from another, i.e. I have a Customer, I know it has some Invoices, each of these has more InvoiceRows which belongs to an InvoiceRowDescription, I would like to know if there's a way to automagically build something like this (for an auto generated named scope's join key):

{:invoices => {:invoice_rows => :invoice_row_description}}

knowing just that the current model is Customer, and the last model is InvoiceRowDescription

Thanks,

G.

Hi, I was wondering if there's a way to know the associations needed to reach a model from another, i.e. I have a Customer, I know it has some Invoices, each of these has more InvoiceRows which belongs to an InvoiceRowDescription, I would like to know if there's a way to automagically build something like this (for an auto generated named scope's join key):

There's not something builtin (although it does sound like it would be a relatively simple graph traversal exercise to produce something like this (picking the 'best' path if there were multiple ones might be trickier)).

Fred

Indeed there are multiple choices... it looks like an operations research problem... I could look at all the model_ids' fields in the last model and traverse them up to the first of the chain (the one which don't belongs to some other model), if I find the current model in this chain, I can stop, otherwise I take other associations chains... in case of loops.. I can consider it a dead end... but this optimal approach can explode in terms of computational complexity (ok, we are dealing with very fiew elements, possibly dozens, rarely an app can have more than 100 models... thus it won't be a real problem, but.... who knows!)