Question

因此，我正在尝试设置组织的名称属性并创建新组织，或者从同一表单中选择以前存在的组织。

我试图按照Ryan Bates关于这个话题的轨道广播：http://railscasts.com/episodes/57-create-model-through-text-field

我也尝试过堆栈中的大量解决方案。但是，我似乎无法让它运行（我和我的验证无法识别我正在使用的虚拟属性）

所以我的组织建模：

class Organization < ActiveRecord::Base
  has_many :materials
  has_many :users
  has_and_belongs_to_many :causes
  has_and_belongs_to_many :schools, :join_table => 'organizations_schools'
####The following line has been edited ####
  attr_accessible :name, :unlogged_books_num, :id, :new_organization_name
  attr_accessor :new_organization_name
  before_validation :create_org_from_name

  validates_presence_of :name

  def self.assign_school_to_organization(org, school)
    orgschool = OrganizationsSchool.create(:organization_id=> org.id, :school_id=> school[0])
  end

 def create_org_from_name
   create_organization(:name=>new_organization_name) unless new_organization_name.blank?
 end
end

我还尝试了以下create_org_from_name：

 def create_org_from_name
   self.name = new_organization_name
 end

在验证或保存实例之前，这不会将名称更改为组织名称。我还尝试将before_save更改为before_validation，但这没有用

我的组织控制员（我也试图在创建中更改此内容）

def create
   respond_to do |format|
      @organization = Organization.new(params[:organization])
      @organization.name = @organization.new_organization_name unless @organization.new_organization_name.blank?
      if @organization.save
        @school = params[:school]
        Organization.assign_school_to_organization(@organization, @school)     
        format.html { redirect_to @organization, notice: 'Organization was successfully created.' }
        format.json { render json: @organization, status: :created, location: @organization }
      else
        format.html { render action: "new" }
        format.json { render json: @organization.errors, status: :unprocessable_entity }
      end
    end
  end

最后，我的表格目前正在做什么：

<%= form_for(@organization) do |f| %>
  <% if @organization.errors.any? %>
    <div id="error_explanation">
      <h2><%= pluralize(@organization.errors.count, "error") %> prohibited this organization from being saved:</h2>

      <ul>
      <% @organization.errors.full_messages.each do |msg| %>
        <li><%= msg %></li>
      <% end %>
      </ul>
    </div>
  <% end %>

  <% @schools = School.all %>
  <% @organizations = Organization.all %>
  <div class="field">
      <%= f.label 'Organization Name' %><br />
      <%= f.collection_select(:name, @organizations, :name, :name, :prompt=>"Existing Organization") %>
      Or Create New
      <%= f.text_field :new_organization_name %>
    </div>
    <div class="field">
      <%= f.label :unlogged_books_num %><br />
      <%= f.number_field :unlogged_books_num %>
    </div>
    <div class="field">
      <%= f.label 'School' %><br />
      <% school_id = nil %>
      <%= collection_select(:school, school_id, @schools, :id, :name) %>  
    </div>
    <div class="actions">
      <%= f.submit %>
    </div>
  <% end %>

================================== EDIT ============ ================================ 所以，目前，当我尝试使用仅在虚拟文本字段中编写的内容创建组织时，我的日志告诉我以下内容：

Processing by OrganizationsController#create as HTML
  Parameters: {"utf8"=>"✓",    "authenticity_token"=>"igoefz8Rwm/RHrHLTXQnG48ygTGLydZrzP4gEJOPbF0=", "organization"=>  {"name"=>"", "new_organization_name"=>"Virtual Organization", "unlogged_books_num"=>""},   "school"=>["1"], "commit"=>"Create Organization"}
  Rendered organizations/_form.html.erb (7.1ms)
  Rendered organizations/new.html.erb within layouts/application (8.0ms)
Completed 200 OK in 17ms (Views: 12.2ms | ActiveRecord: 1.0ms)

================================编辑2 ============= =============================== 如果我尝试创建一个运行此命令的新组织，那么这就是我从rails控制台获得的内容：Organization.create(:new_organization_name=>"Virtual Organization", :unlogged_books_num=>"3")

irb(main):001:0> Organization.create(:new_organization_name=>"Virtual Organization",    :unlogged_books_num=>"3")
   (0.1ms)  BEGIN
   (0.1ms)  ROLLBACK
=> #<Organization id: nil, name: nil, unlogged_books_num: 3, created_at: nil, updated_at: nil>

如果create_org_from_name的函数是self.name = new_organization_name，那么来自控制台的同一命令的结果是空白的：

irb(main):002:1> Organization.create(:new_organization_name=>"Virtual Organization", :unlogged_books_num=>"3")
irb(main):003:1>

Answer 1

你需要：

before_validation :create_org_from_name

和

def create_org_from_name
  self.name = new_organization_name if not new_organization_name.blank?
end

您不希望在before_validation方法中进行创建。

从现有创建选择或在表单Rails 3中创建新

1 个答案: