Question

有父母和孩子的模型。我无法理解如何制作这个逻辑：

如果表格在电子邮件中没有记录，然后以父母表格中的条目形式输入，并且在表格中的сhilds状态字段中记录为真。
如果表格已在表格字段中输入的电子邮件中有记录сhilds且状态= true，则不要在表格或表格中创建任何新条目父母сhilds
< / LI>
如果表格已在表单字段中输入的电子邮件中有记录сhilds且status = false，则会在表格parent中创建一个条目，并在状态字段中创建表格сhilds记录是真的。

仍然需要能够通过其他形式的控制器ChildsController在表сhilds中创建一个新条目在表中写入只能创建сhildscurrent_user，其中field status = true。如果在状态字段中成功创建了条目，则写入false

谢谢。

migrations parents
t.string "name"  

migrations childs
t.string "name" 
t.string "email"
t.integer "parent_id"
t.boolean  "status", default: false

model Parent
class Parent < ActiveRecord::Base
  has_many :childs
  accepts_nested_attributes_for :childs

  validates :name, presence: true, uniqueness: true
end

model Child
class Child < ActiveRecord::Base
  belongs_to :parent

  validates :name, :email, presence: true
  validates_uniqueness_of :email, scope: :parent
end

controller ParentsController
class ParentsController < ApplicationController
  def new
    @parent = Parent.new
    @parent.childs.build
  end

  def create
    @parent = Parent.new(parent_params)
    if @parent.save
      redirect_to root_path
    else
      render :new
    end
  end

  private
  def parent_params
    params.require(:parent).permit(:name, childs_attributes: [:parent_id, :name, :email, :status])
  end

end


form1  to create entries in the tables of parents and childs
<%= form_for @parent do |parent_form| %>
    <div class="field">
      <%= parent_form.text_field :name %>
    </div><br>
    <%= parent_form.fields_for :childs do |childs_form| %>
        <div class="field">
          <%= childs_form.text_field :name %>
        </div><br>
        <div class="field">
          <%= childs_form.email_field :email %>
        </div><br>
    <% end %>
    <div class="action"><br>
      <%= submit_tag 'submit' %>
    </div>
<% end %>


form2 to create entries in the table childs
<%= form_for(@child) do |f| %>
    <div class="field">
      <%= f.text_field :name %>
    </div><br>
    <div class="field">
      <%= f.email_field :email %>
    </div><br>
<div class="action"><br>
  <%= f.submit 'submit' %>
</div>
<% end %>


controller ChildsController
class ChildsController < ApplicationController
  def new
    @child = Child.new
  end

  def create
    @child = current_user.parent.childs.build(child_params)
    if @child.save
      redirect_to root_path
    else
      redirect_to :back
    end
  end

  private
  def child_params
    params.require(:child).permit(:name, :email)
  end

end

ruby-on-rails：构建关联对象

0 个答案: