Rails应用中英国个人头衔在用户注册表上的下拉及其实现

# title.rb
class Title < ApplicationRecord
  enum category: { mr: 0, mrs: 1, miss: 2, ms: 3, dr: 4 }
end

# user.rb
class User < ApplicationRecord
  belongs_to :title
end

# users_controller.rb
class UsersController < ApplicationController
  def new
    @user = User.new
    @titles = Title.all
  end

  def create
    @user = User.new(user_params)
    if @user.save
      # 保存成功的处理逻辑
    else
      # 保存失败的处理逻辑
    end
  end

  private

  def user_params
    params.require(:user).permit(:title_id, :name, :email, :password)
  end
end

# new.html.erb
<%= form_for @user do |f| %>
  <%= f.label :title_id, "Title" %>
  <%= f.collection_select :title_id, @titles, :id, :name, prompt: true %>
  <%= f.label :name %>
  <%= f.text_field :name %>
  <%= f.label :email %>
  <%= f.email_field :email %>
  <%= f.label :password %>
  <%= f.password_field :password %>
  <%= f.submit "Register" %>
<% end %>

# show.html.erb
<p>Title: <%= @user.title.name %></p>
<p>Name: <%= @user.name %></p>
<p>Email: <%= @user.email %></p>