# In a view I'm trying to get a username representation for users instead of the user_id:

<div class="field">
    <%= f.label :user_id %>
    <%= f.text_field :user_id, options_for_select( User.all.map{ |u| [u.username, u.id] }, params[:user_id] ) %>
  </div>

"""
When I do this, I get this error:

Showing /home/hseritt/dev/ruby/events/app/views/events/_form.html.erb where line #36 raised:

undefined method `merge' for #<ActiveSupport::SafeBuffer:0x007f36fc34ece0>
Extracted source (around line #36):
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36
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39

  <div class="field">
    <%= f.label :user_id %>
    <%= f.text_field :user_id, options_for_select( User.all, params[:user_id] ) %>
  </div>

  <div class="actions">

Trace of template inclusion: app/views/events/edit.html.erb

Rails.root: /home/hseritt/dev/ruby/events

Application Trace | Framework Trace | Full Trace
app/views/events/_form.html.erb:36:in `block in _app_views_events__form_html_erb___1052964315614350465_69937071727060'
app/views/events/_form.html.erb:1:in `_app_views_events__form_html_erb___1052964315614350465_69937071727060'
app/views/events/edit.html.erb:3:in `_app_views_events_edit_html_erb___71126088508495426_69937071917140'
Request

Parameters:

{"id"=>"1"}
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Response

Headers:

None

"""