Rendering a heterogeneous list of objects in rails that includes arrays

Question

I have a collection of Attachments, Notes, and Array of Attachments. For example

@heteroCollection = [Attachment, Note, Note, [Attachment, Attachment, Attachment]]

In my view I attempt to render this collection

<%= render :partial => @heteroCollection %>

but rails chokes saying the array of attachments needs to implement :to_partial_path

[Attachment, ..., Attachment] is not an ActiveModel-compatible object. It must implement :to_partial_path

If I remove the array the rendering works great calling _attachment.html.erb and _note.html.erb for the respective records.

Is there a way to implement :to_partial_path on Array without monkey patching? Or is there another better solution?

Tim Baas · Accepted Answer · 2013-07-25 19:04:30Z

1

You can create the class AttachmentArray, extend it from Array and add the to_partial_path method to it. Than push your attachments to a new instance of that class..

answered Jul 25, 2013 at 19:04

Tim Baas

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