How do I convert all my enum options into an array for use in a collection for a dropdown menu?

Question

I have an enum on my class like this:

class Post < ActiveRecord::Base
  enum status: [ :unconfirmed, :corroborated, :confirmed ]
end

I am using Simple Form, and I want to produce a dropdown menu in my form partial.

This is what I have now:

<%= simple_form_for(@post, html: {class: 'form-horizontal' }) do |f| %> 

    <%= f.error_notification %>
    <%= f.input_field :parent_id, as: :hidden %>

    <div class="field">
    <% if can? :manage, @post %>
            <%= f.input_field :status, label: "Status", collection: Post.statuses, selected: Post.statuses[:corroborated] %>    
    <% end %>       
    </div>

    <%= f.input :title, placeholder: "Enter Title" %>
    <%= f.input :photo %>
        <%= f.input :file %>
    <%= f.input :body %>
        <div class="report-submit">
            <%= f.button :submit %>
        </div>

<% end %>

When I create a new Post record, I get this error:

Completed 500 Internal Server Error in 20ms

ArgumentError - '2' is not a valid status:

When I do Post.statuses in my console, I get this:

 > Post.statuses
 => {"unconfirmed"=>0, "corroborated"=>1, "confirmed"=>2} 

How can I do what I need with this enum?

Answer 1

You need to use keys of enum as name and value in collection. Meaning, you need to use Post.statuses.keys as collection:

<% statuses = Post.statuses %>
<%= f.input_field :status, label: "Status", collection: statuses.keys, selected: :corroborated %>