Question

我遇到了一个麻烦，我是ROR的新手，想要使用嵌套属性为组织保存一些图像，或者为了简单起见只是一个字符串，以便尝试在数据库中保存嵌套属性，但实际上它没有保存。

组织模式

class Organization < ApplicationRecord
has_secure_password
has_many :needs, dependent: :destroy
has_many :org_images, dependent: :destroy
has_many :stringas, dependent: :destroy
accepts_nested_attributes_for :org_images, :reject_if => lambda { |t| t['org_image'].blank? }
accepts_nested_attributes_for :stringas, :reject_if => lambda { |t| t['stringa'].blank? }

模式

create_table "org_images", force: :cascade do |t|
t.string   "caption"
t.integer  "organization_id"
t.datetime "created_at",         null: false
t.datetime "updated_at",         null: false
t.string   "photo_file_name"
t.string   "photo_content_type"
t.integer  "photo_file_size"
t.datetime "photo_updated_at"
end

  create_table "stringas", force: :cascade do |t|
t.string   "name"
t.datetime "created_at",      null: false
t.datetime "updated_at",      null: false
t.integer  "organization_id"
end

组织控制器

def new
@organization = Organization.new
3.times {@organization.org_images.build}
@organization.stringas.build # added this
end
  def organization_params
 params.require(:organization).permit(:org_name, :email, :password, :info,:image, :website_URL, :contacts, :logo_url , :password_confirmation  ,stringas_attributes:[:name,:id,:organization_id,:created_at,:updated_at] ,org_images_attributes: [:id,:organization_id,:caption, :photo_file_name, :photo_content_type,:photo_file_size,:photo_updated_at])

端 组织表格

<div class= "field">

<% if builder.object.new_record? %>

  <p>
  <%= builder.label :caption, "Image Caption" %>
  <%= builder.text_field :caption %>
  </p>

  <p>
  <%= builder.label :photo, "Image File" %>
  <%= builder.file_field :photo %>
  </p>

<% end %>

<% if builder.object.new_record? %>

  <p>
  <%= builder.label :name %>
  <%= builder.text_field :name%>
  </p>

<% end %>

<% end %>

Stringa和org_image模型

class OrgImage < ApplicationRecord
belongs_to :organization
has_attached_file :photo, :styles => { :small => "150x150>", :large =>      "320x240>" }
validates_attachment_presence :photo
validates_attachment_size :photo, :less_than => 5.megabytes
end

class Stringa < ApplicationRecord
belongs_to :organization
end

组织cotroller创建

  def create
@organization = Organization.new(organization_params)

respond_to do |format|
  if @organization.save
    session[:organization_id]=@organization.id
    format.html { redirect_to @organization, notice: 'Organization was successfully created.' }
    format.json { render :show, status: :created, location: @organization }

  else
    format.html { render :new }
    format.json { render json: @organization.errors, status: :unprocessable_entity }
  end
end

端 git repository 感谢您的帮助

Answer 1

问题似乎在于org_images中未经许可的OrganizationsController属性。您应该将其添加到organization_parameters方法：

params.require(:organization).permit( ... , org_images_attributes: [:photo, :caption])

编辑：

在深入挖掘后，我发现上述解决方案并不总是有效。在GitHub上的Rails repo中有关于此主题的issue。如果您想找到适合您需求的好方法，您应该阅读它，或查看this答案。

嵌套属性不保存在Rails 5上的数据库中

1 个答案: