Should I use databasejoin rendered as checkboxes in this case?

[Chill]

Hello,

Let assume that there are 3 tables: A, B, C

I would like to create a checklist of items in table B in form A.
And for each selected item of B, I would like to create a checklist of items in table C.

From my knowledge, I can use databasejoin rendered as checkboxes to get items in B into form A.
But I'm not sure how to do the same thing for items in C.
Or should I use other way instead of databasejoin checkboxes?

Any suggestions would be appreciated.

 

[woznyp]

You may use cascading dropdown element with ajax triggered onchange.
E.g.
select country from A
in B select city from country selected in A
in C select street from city selected in B

and do it in one form!

 

[Chill]

Thank you so much!