Ruby on rails 4 在创建子对象之前捕获父对象信息_Ruby On Rails 4_Nested Forms_Friendly Id_Before Save

Ruby on rails 4 在创建子对象之前捕获父对象信息

ruby-on-rails-4

Ruby on rails 4 在创建子对象之前捕获父对象信息,ruby-on-rails-4,nested-forms,friendly-id,before-save,Ruby On Rails 4,Nested Forms,Friendly Id,Before Save,我正在使用两种型号：地点和产品地点是父项，产品是子项。我以前让用户分别创建这些记录，首先让用户创建位置，然后再创建产品我现在使用嵌套的表单来减少额外的步骤我现在遇到的问题是格式化的URL创建（使用友好id）之前，正如您在下面看到的，我的url是由从其父级收集的元素创建的我现在遇到的问题是，由于父对象与子对象同时创建，因此在保存位置之前，它无法分配该位置的当前位置并将其发布给子对象。作为回报，这不允许我的产品拾取我以前用于生成url的位置字段是否有一种方法可以让我收集所有位置信息，在创

我正在使用两种型号：地点和产品

地点是父项，产品是子项。我以前让用户分别创建这些记录，首先让用户创建位置，然后再创建产品

我现在使用嵌套的表单来减少额外的步骤

我现在遇到的问题是格式化的URL创建（使用友好id）

之前，正如您在下面看到的，我的url是由从其父级收集的元素创建的

我现在遇到的问题是，由于父对象与子对象同时创建，因此在保存位置之前，它无法分配该位置的当前位置并将其发布给子对象。作为回报，这不允许我的产品拾取我以前用于生成url的位置字段

是否有一种方法可以让我收集所有位置信息，在创建产品之前将其传递给产品，以便它能够生成我需要的url字符串

位置模型

class Location < ActiveRecord::Base

 has_many :products, dependent: :destroy
 accepts_nested_attributes_for :products, :allow_destroy => :true
 validates_associated :products

end

class Product < ActiveRecord::Base

 extend FriendlyId
 friendly_id :slug_candidates, use: :slugged

 def slug_candidates
  [
    [location.media_type, location.state, location.name, :name, :sku]
  ]
 end

日志

Started POST "/locations" for 127.0.0.1 at 2014-05-16 08:51:01 -0700
Processing by LocationsController#create as HTML
Parameters: {"utf8"=>"✓", "authenticity_token"=>"vD4e68ZoJUD0Qp/XUS1Co4nzqyZ6Zf6fshdFL2/7TXA=",  "location"=>{"name"=>"Testing", "vendor_id"=>"1", "media_type"=>"Digital Billboards", "market"=>"SF   Bay Area", "city"=>"santa clara", "state"=>"CA", "zipcode"=>"95124", "longitude"=>"", "latitude"=>"", "installation_side"=>"", "ad_rotation_frequency"=>"", "ad_spot_duration"=>"", "weekly_cycle"=>"", "board_width"=>"", "board_height"=>"", "ad_size_width"=>"", "ad_size_height"=>"", "supported_ad_types"=>"", "age_demographic"=>"", "ethnicity_demo_white"=>"", "ethnicity_demo_black"=>"", "ethnicity_demo_asian"=>"", "ethnicity_demo_hispanic"=>"", "products_attributes"=>{"0"=>{"name"=>"North Face", "sku"=>"1001", "tab_id"=>"", "available_spots"=>"", "dec"=>"", "ooh"=>"", "retail_weekly_price"=>"", "reserve_price"=>"", "description"=>"", "_destroy"=>"false"}}}, "commit"=>"Create Location"}
  User Load (0.3ms)  SELECT `users`.* FROM `users` WHERE `users`.`id` = 1 ORDER BY `users`.`id` ASC LIMIT 1
  (0.1ms)  BEGIN
  Location Exists (0.3ms)  SELECT 1 AS one FROM `locations` WHERE `locations`.`slug` = 'testing' LIMIT 1
  Product Exists (0.3ms)  SELECT 1 AS one FROM `products` WHERE `products`.`slug` = 'north-face-1001' LIMIT 1
  Product Exists (0.3ms)  SELECT 1 AS one FROM `products` WHERE `products`.`slug` = 'north-face-1001' AND (`products`.`id` IS NOT NULL) LIMIT 1
  SQL (0.3ms)  INSERT INTO `locations` (`ad_rotation_frequency`, `age_demographic`, `city`, `created_at`, `installation_side`, `market`, `media_type`, `name`, `slug`, `state`, `supported_ad_types`, `updated_at`, `vendor_id`, `weekly_cycle`, `zipcode`) VALUES ('', '', 'santa clara', '2014-05-16 15:51:01', '', 'SF Bay Area', 'Digital Billboards', 'Testing', 'testing', 'CA', '', '2014-05-16 15:51:01', 1, '', 95124)
  Location Load (0.3ms)  SELECT `locations`.* FROM `locations` WHERE `locations`.`id` = 119 ORDER BY `locations`.`id` ASC LIMIT 1
  Vendor Load (0.2ms)  SELECT `vendors`.* FROM `vendors` WHERE `vendors`.`id` = 1 ORDER BY `vendors`.`id` ASC LIMIT 1
  SQL (30.0ms)  INSERT INTO `products` (`created_at`, `description`, `location_id`, `location_name`, `market`, `name`, `sku`, `slug`, `tab_id`, `updated_at`, `vendor_id`, `vendor_name`) VALUES ('2014-05-16 15:51:01', '', 119, 'Testing', 'SF Bay Area', 'North Face', '1001', 'north-face-1001', '', '2014-05-16 15:51:01', 1, 'AdSemble')
   (11.2ms)  COMMIT
   Redirected to http://localhost:3000/locations/testing
   Completed 302 Found in 63ms (ActiveRecord: 43.4ms)

你是如何通过这些参数的？你允许他们吗？是的。它们在my locations controller:params.require（：location.permit（..，products_attributes:[：id，：name，…]）中传递。您可以共享日志吗？视图和产品_attributes中，您为什么传递id？@Babar:对不起，您可以重新表述您的问题吗？产品_属性[：id]用于嵌套的_表单，因此它只创建一条记录

Started POST "/locations" for 127.0.0.1 at 2014-05-16 08:51:01 -0700
Processing by LocationsController#create as HTML
Parameters: {"utf8"=>"✓", "authenticity_token"=>"vD4e68ZoJUD0Qp/XUS1Co4nzqyZ6Zf6fshdFL2/7TXA=",  "location"=>{"name"=>"Testing", "vendor_id"=>"1", "media_type"=>"Digital Billboards", "market"=>"SF   Bay Area", "city"=>"santa clara", "state"=>"CA", "zipcode"=>"95124", "longitude"=>"", "latitude"=>"", "installation_side"=>"", "ad_rotation_frequency"=>"", "ad_spot_duration"=>"", "weekly_cycle"=>"", "board_width"=>"", "board_height"=>"", "ad_size_width"=>"", "ad_size_height"=>"", "supported_ad_types"=>"", "age_demographic"=>"", "ethnicity_demo_white"=>"", "ethnicity_demo_black"=>"", "ethnicity_demo_asian"=>"", "ethnicity_demo_hispanic"=>"", "products_attributes"=>{"0"=>{"name"=>"North Face", "sku"=>"1001", "tab_id"=>"", "available_spots"=>"", "dec"=>"", "ooh"=>"", "retail_weekly_price"=>"", "reserve_price"=>"", "description"=>"", "_destroy"=>"false"}}}, "commit"=>"Create Location"}
  User Load (0.3ms)  SELECT `users`.* FROM `users` WHERE `users`.`id` = 1 ORDER BY `users`.`id` ASC LIMIT 1
  (0.1ms)  BEGIN
  Location Exists (0.3ms)  SELECT 1 AS one FROM `locations` WHERE `locations`.`slug` = 'testing' LIMIT 1
  Product Exists (0.3ms)  SELECT 1 AS one FROM `products` WHERE `products`.`slug` = 'north-face-1001' LIMIT 1
  Product Exists (0.3ms)  SELECT 1 AS one FROM `products` WHERE `products`.`slug` = 'north-face-1001' AND (`products`.`id` IS NOT NULL) LIMIT 1
  SQL (0.3ms)  INSERT INTO `locations` (`ad_rotation_frequency`, `age_demographic`, `city`, `created_at`, `installation_side`, `market`, `media_type`, `name`, `slug`, `state`, `supported_ad_types`, `updated_at`, `vendor_id`, `weekly_cycle`, `zipcode`) VALUES ('', '', 'santa clara', '2014-05-16 15:51:01', '', 'SF Bay Area', 'Digital Billboards', 'Testing', 'testing', 'CA', '', '2014-05-16 15:51:01', 1, '', 95124)
  Location Load (0.3ms)  SELECT `locations`.* FROM `locations` WHERE `locations`.`id` = 119 ORDER BY `locations`.`id` ASC LIMIT 1
  Vendor Load (0.2ms)  SELECT `vendors`.* FROM `vendors` WHERE `vendors`.`id` = 1 ORDER BY `vendors`.`id` ASC LIMIT 1
  SQL (30.0ms)  INSERT INTO `products` (`created_at`, `description`, `location_id`, `location_name`, `market`, `name`, `sku`, `slug`, `tab_id`, `updated_at`, `vendor_id`, `vendor_name`) VALUES ('2014-05-16 15:51:01', '', 119, 'Testing', 'SF Bay Area', 'North Face', '1001', 'north-face-1001', '', '2014-05-16 15:51:01', 1, 'AdSemble')
   (11.2ms)  COMMIT
   Redirected to http://localhost:3000/locations/testing
   Completed 302 Found in 63ms (ActiveRecord: 43.4ms)