[RUBY] Today's learning summary: With user management function implementation

Introduction

This time, I'm writing a lot of things that I want to remember completely for myself.

Regular expressions

PASSWORD_REGEX = /\A(?=.*?[A-z])(?=.*?[\d])[A-z\d]+\z/i.freeze #One or more half-width alphanumeric characters
ZENKAKU_REGEX = /\A[Ah-Hmm-One-龥]+\z/.freeze #Full-width Hirakata Kanji
KANA_REGEX = /\A[A-Car-]+\z/.freeze #full-width Kana

freeze is to keep variables unchanged.

Summarize validation options

with_options presence: true do
 validates #Add options
end

Display an error message

Call the file with the render method in foem_with. At that time, describe as if it is a file under devise.

<%= form_with model: @user, url: user_registration_path', local: true do |f| %>
  <%= render 'devise/shared/error_messages', model: f.object %>

ruby:_error_messages.html.erb

<% if model.errors.any? %>
  <div id="error_explanation">
    <h2>
      <%= I18n.t("errors.messages.not_saved",
                 count: model.errors.count,
                 resource: model.class.model_name.human.downcase)
       %>
    </h2>
    <ul>
      <%= model.errors.full_messages.each do |message| %>
        <li><%= message %></li>
      <% end %>
    </ul>
  </div>
<% end %>

Write to call model.