Get an array from a Rails form

Question

I need to design a form for a account resource. In that form, i need to collect some set of ids as an array in the params hash in attribute called

Answer 1

In a complex form, with nested attributes, you can make use of the f.object_name helper. But beware of the syntax when doing interpolation. This is correct:

"#{f.object_name}[relationships][]"

This is NOT correct:

"#{f.object_name}[relationships[]]"

It always trips me up.