Question

我是rails社区的新手。我正在开发一个应用程序，用户可以使用名字和名字的嵌套属性的用户名。与User模型关联的其他文本字段工作正常。

非常感谢任何帮助。

附带应用程序模型，控制器，迁移文件，数据库架构和视图。

模型

class User < ActiveRecord::Base
  has_one :username, dependent: :destroy
  accepts_nested_attributes_for :username, allow_destroy: true

end


class Username < ActiveRecord::Base
  belongs_to :user


end

迁移

class CreateUsers < ActiveRecord::Migration
  def change
    create_table :users do |t|
      t.string :email
      t.string :about_me
      t.string :nationality
      t.string :sexe
      t.timestamps null: false
    end
  end
end


class CreateUsernames < ActiveRecord::Migration
  def change
    create_table :usernames do |t|
      add_column :username, :first_name, :string
      add_column :username, :last_name, :string
      t.references :user, index: true, foreign_key: true
      t.timestamps null: false
    end
  end
end

控制器

class UsersController < ApplicationController
  def index
    @all_users = User.all
    @new_user = User.new
    @username = Username.new
  end

  def new
    @new_user = User.new
  end

  def create
    User.create(user_params)
  end

  private

  def user_params
    params.require(:user).permit(:email, :about_me, username_attributes:
    [:last_name, :first_name])
  end
end

视图

<h1>Users#index</h1>
<p>Find me in app/views/users/index.html.erb</p>


<%= form_for @new_user do |f| %>
  <%= f.fields_for @new_user do |user| %>
    <div class="field">
      <%= user.label :email%>
      <%= user.text_field :email %>
      <%= user.label :about_me %>
      <%= user.text_field :about_me %>
    </div>
    <% end %>
    <%= f.fields_for :username do |name| %>
      <div class="field">
        <%= name.label :first_name %>
        <%= name.text_field :first_name %>
      </div>
    <% end %>


     <div class="form-actions">
        <%= f.button :submit %>
      </div>

<% end %>

Answer 1

试试这个控制器

def new
    @new_user = User.new
    @new_user.usernames.build
end

视图

<%= form_for @new_user do |f| %>
  # ...
  <%= f.fields_for :usernames do |name| %>
    <div class="field">
      <%= name.label :first_name %>
      <%= name.text_field :first_name %>
    </div>
  <% end %>
  # ...
<% end %>

辅助

def name_format(user_mst)
    name = user_mst.first_name.capitalize
    name += (" #{user_mst.last_name.capitalize}")

    return name
end

在视图上显示

嵌套属性文本字段未显示在我的视图中

1 个答案: