Usually you add errors to :base in ActiveRecord Show archive.org snapshot , in case no appropriate attribute could be used to add the error.
Simple Form
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doesn't render errors on :base by default, but here a few options how you can render these on demand. For all the options below we use the following example with a Simple Form Bootstrap configuration:
- @user = Backend::User.new
- @user.errors.add(:base, 'First error')
- @user.errors.add(:base, 'Second error')
= simple_form_for(@user) do |form|
= form.input :email
= form.submit 'Save', class: ['btn', 'btn-primary']
Option 1: Using the form.error method
The form.error method renders the first error on :base.
= simple_form_for(@user) do |form|
- if form.error(:base).present?
.mb-3.alert.alert-danger
= form.error :base
= form.input :email
= form.submit 'Save', class: ['btn', 'btn-primary']
<div class="mb-3 alert alert-danger">
<span class="invalid-feedback">First error</span>
</div>
Option 2: Using the form.error_notification method
As suggested in
an example template
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the error_notification allows to render a default error message or the errors itself.
= simple_form_for(@user) do |form|
= form.error_notification
= form.error_notification message: form.object.errors[:base].to_sentence if form.object.errors[:base].present?
= form.input :email
= form.submit 'Save', class: ['btn', 'btn-primary']
<div class="mb-3 alert alert-danger">
<span class="invalid-feedback">First error</span>
</div>
Option 3: Using custom code
= simple_form_for(@user) do |form|
- errors = form.object.errors[:base]
- if errors.present?
.alert.alert-danger
%ul.mb-0
- errors.each do |error|
%li= error
= form.input :email
= form.submit 'Save', class: ['btn', 'btn-primary']
<div class="alert alert-danger">
<ul class="mb-0">
<li>First error</li>
<li>Second error</li>
</ul>
</div>
Posted by Emanuel to makandra dev (2023-05-11 11:49)