Learn Rails 5.2 by Stefan Wintermeyer

Author:Stefan Wintermeyer
Language: eng
Format: azw3, epub
Publisher: Apress, Berkeley, CA
Published: 2018-04-16T21:25:49.246536+00:00

<ul>

<% product.errors.full_messages.each do |message| %>

<li><%= message %></li>

<% end %>

</ul>

</div>

<% end %>

<div class="field">

<%= f.label :name %>

<%= f.text_field :name %>

</div>

<div class="field">

<%= f.label :price %>

<%= f.text_field :price %>

</div>

<div class="actions">

<%= f.submit %>

</div>

<% end %>

Listing 4-7app/views/products/_form.html.erb

In a block, the helper form_for takes care of creating the HTML form via which the user can enter the data for the record or edit it. If you delete a complete <div class="field"> element here, this can no longer be used for input in the web interface. I am not going to comment on all possible form field variations at this point. The most frequently used ones will appear in examples later and be explained then (if they are not self-explanatory).

 You can find an overview of all form helpers at http://guides.rubyonrails.org/form_helpers.html .

When using validations in the model, any validation errors that occur are displayed in the following code at the head of the form:

<% if product.errors.any? %>

<div id="error_explanation">

<h2><%= pluralize(product.errors.count, "error") %> prohibited this product from being saved:</h2>

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