Question

I am creating a virtual attribute in my model:

def entities
  @entities = Array.new()
  @entities.push(self.contact.name)
  @entities.push(self.contact.partner.name) if self.contact.partner
  @entities.push('Joint') if self.contact.partner
  @entities
end

Then in my form I’m trying to use this array from a nested array. I’m using simple form so it looks like this

<%= f.input :ownership, collection: :entities, :include_blank => false, :label => false %>

However this gives me an error:

undefined method `to_a' for :entities:Symbol

If I have created an array, I don’t understand why it isn’t rendering as an array. What am I missing?

Answer 1

You can’t use :entities as the collection:

<%= f.input :ownership, collection: :entities ...%>

That doesn’t work. The error indicates that Simple Form is attempting to convert the argument :entities to an array, which is causing an error.

You need to give it an actual collection:

<%= f.input :ownership, collection: @object.entities ... %>