I need to reduce the selectable items to what is appropriate considering what was previously established.
Say I have [Class] has_many [Order] has_many [Family]
(Remember old-school version of Kingdom Phylum Class Order Family Genus Species?)
When the data-entry person has previously selected, say, the four-legged mamals [Class],
and the Canids [Order] (I have no clue if this is at all right, but I hope you get the point),
They should just get Wolves, Foxes, and Dogs, etc. as their choices since they've narrowed it down that far.
I don't want to give the operator a list of [Families] like Cats or Crows or Crocodiles.
How do I go about that?
I'd assume you're trying to draw, say, the Family
select box like this:
<%= collection_select :family_id, Family.all, :id, :name %>
But given that the user has already selected an order (let's assume you've instantiated that object as @order
:
<%= collection_select :family_id, @order.families, :id, :name %>
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