ActiveRecord validations breaks page UI

[moneil868]

I am unsure whether this issue should live in ActiveAdmin or Formtastic so I am creating it in both places. There seems to be some strange behaviour when attempting to submit a form (either edit or create) on a model containing ActiveRecord validations. For example, let's assume we have a User model with validates :name, presence: true

Current Behaviour

Attempting to submit this form will provide a validation error (as expected), except the page elements are not formatted as they should.

I am unsure why the page is injecting the HTML as plain text, nor I am able to find where this injection takes place.

<li class="string input error required stringish" id="user_first_name_input">&lt;label for="user_first_name" class="label"&gt;First name&lt;abbr title="required"&gt;*&lt;/abbr&gt;&lt;/label&gt;&lt;input id="user_first_name" type="text" value="" name="user[first_name]" /&gt;
<p class="inline-errors">can't be blank</p>
</li>

The problem appears to occur regardless of the type of validation message. Manually editing the HTML produces, what I can only assume, is the expected result.

<li class="string input error required stringish" id="user_first_name_input">
  <label for="user_first_name" class="label">First name</label>
  <input id="user_first_name" type="text" value="" name="user[first_name]">
<p class="inline-errors">can't be blank</p>
</li>

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Gem versions

• activeadmin (2.13.1)
• formtastic (4.0.0)
• jquery-rails (4.5.0)

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ActiveAdmin issue