ActiveRecord转换嵌套属性

class User < ApplicationRecord
  has_one :address
  accepts_nested_attributes_for :address
end

def create
  @user = User.new(user_params)
  # ...
end

private

def user_params
  params.require(:user).permit(:name, address_attributes: [:province, :city, :street])
end

<%= form_for @user do |f| %>
  <%= f.label :name %>
  <%= f.text_field :name %>

  <%= f.fields_for :address do |address_fields| %>
    <%= address_fields.label :province %>
    <%= address_fields.text_field :province %>

    <%= address_fields.label :city %>
    <%= address_fields.text_field :city %>

    <%= address_fields.label :street %>
    <%= address_fields.text_field :street %>
  <% end %>

  <%= f.submit %>
<% end %>