我在尝试将用户添加到我的数据库时收到回滚，但我不确定原因。
我有三种型号： 的 company.rb
class Company < ActiveRecord::Base
acts_as_paranoid
has_many :locations, dependent: :destroy
has_many :users, dependent: :destroy
has_many :tests, through: :locations
has_many :reports, dependent: :destroy
accepts_nested_attributes_for :locations, :users
validates_presence_of :name
end
** user.rb **
class User < ActiveRecord::Base
acts_as_paranoid
devise :database_authenticatable,
:recoverable,
:rememberable,
:trackable,
:validatable,
:registerable
belongs_to :company
has_and_belongs_to_many :roles
end
** location.rb **
class Location < ActiveRecord::Base
acts_as_paranoid
belongs_to :company
has_many :network_hosts, dependent: :destroy
has_many :tests, dependent: :destroy
has_many :commands, dependent: :destroy
validates_presence_of :company, :identifier, :name
validates_uniqueness_of :identifier
delegate :security_percentage, to: :last_test, allow_nil: true
after_initialize :generate_identifier, if: -> { self.identifier.blank? }
def generate_identifier
self.identifier = SecureRandom.uuid.delete("-")
end
因此，当用户想要注册时，他们需要输入公司，位置和用户信息，这些信息由我的company_controller.rb
** company_controller.rb **
class CompanyController < ApplicationController
def new
@company = Company.new
1.times { @company.locations.build }
1.times { @company.users.build }
end
def create
@company = Company.new(company_params)
if @company.save
redirect_to root_url
else
render :new
end
end
private
def company_params
params.require(:company).permit(:name, locations_attributes: [:name], users_attributes: [:first_name, :last_name, :full_name, :email, :password, :password_confirmation])
end
end
表单使用带有嵌套属性的标准form_for，以便我可以在用户单击提交按钮时一次性完成所有内容
** company / new.html.erb **
<%= form_for @company, :url => url_for( :controller => 'company', :action => 'new' ) do |f| %>
<div class="form-group">
<%= f.label "Company Name" %>
<%= f.text_field :name, class: "form-control", placeholder: "ACME Inc." %>
<%= f.fields_for :locations do | location_builder | %>
<%= location_builder.label "Location Name" %>
<%= location_builder.text_field :name, class: "form-control", placeholder: "Main Building" %>
<% end %>
</div>
<div class="form-group">
<%= f.fields_for :users do | user_builder | %>
<%= user_builder.label "First Name" %>
<%= user_builder.text_field :first_name, class: "form-control", placeholder: "John" %>
<%= user_builder.label "Last Name" %>
<%= user_builder.text_field :last_name, class: "form-control", placeholder: "Smith" %>
<%= user_builder.label "Full Name" %>
<%= user_builder.text_field :full_name, class: "form-control", placeholder: "John Smith" %>
<%= user_builder.label "Email" %>
<%= user_builder.email_field :email, class: "form-control", placeholder: "john@acme.com" %>
<%= user_builder.label "Password" %>
<%= user_builder.password_field :password, class: "form-control" %>
<%= user_builder.label "Confirm Password" %>
<%= user_builder.password_field :password_confirmation, class: "form-control" %>
<% end %>
</div>
<%= f.submit "Submit", class: "btn btn-large btn-success" %>
<% end %>
但是，我正在日志中回滚，但这并没有发生，也无法找出原因。
Started POST "/signup" for 127.0.0.1 at 2015-08-07 13:49:22 -0400
Processing by CompanyController#create as HTML
Parameters: {"utf8"=>"✓", "authenticity_token"=>"2OHwJ9UfEbfkZHjLdm9BfOd7jlRdvoEz0L4NRJCKl64=", "company"=>{"name"=>"ACME Brick", "locations_attributes"=>{"0"=>{"name"=>"Main House"}}, "users_attributes"=>{"0"=>{"first_name"=>"Testin", "last_name"=>"User", "full_name"=>"Test User", "email"=>"test@test.com", "password"=>"[FILTERED]", "password_confirmation"=>"[FILTERED]"}}}, "commit"=>"Submit"}
User Load (0.8ms) SELECT "users".* FROM "users" WHERE "users"."deleted_at" IS NULL AND "users"."id" = 7 ORDER BY "users"."id" ASC LIMIT 1
Role Load (0.3ms) SELECT "roles".* FROM "roles" INNER JOIN "roles_users" ON "roles"."id" = "roles_users"."role_id" WHERE "roles"."deleted_at" IS NULL AND "roles_users"."user_id" = $1 [["user_id", 7]]
(0.1ms) BEGIN
Location Exists (0.3ms) SELECT 1 AS one FROM "locations" WHERE "locations"."identifier" = '3b7febb35ea740488788d43fcc5e989c' LIMIT 1
User Exists (0.3ms) SELECT 1 AS one FROM "users" WHERE "users"."email" = 'test@test.com' LIMIT 1
(0.1ms) ROLLBACK
Rendered company/new.html.erb within layouts/application (5.0ms)
Completed 200 OK in 108ms (Views: 32.2ms | ActiveRecord: 1.9ms | Solr: 0.0ms)
**公司表**
class CreateCompanies < ActiveRecord::Migration
def change
create_table :companies do |t|
t.string :name
t.timestamps
end
end
end
**位置表**
class CreateLocations < ActiveRecord::Migration
def change
create_table :locations do |t|
t.belongs_to :company, index: true
t.string :identifier
t.string :name
t.timestamps
end
end
end
**用户表**
class CreateUsers < ActiveRecord::Migration
def self.up
create_table(:users) do |t|
t.belongs_to :company, index: true
t.string :username
t.string :first_name
t.string :last_name
t.string :full_name
t.string :time_zone, :default => "Central Time (US & Canada)"
t.string :avatar_file_name
t.string :avatar_content_type
t.integer :avatar_file_size
t.datetime :avatar_updated_at
## Database authenticatable
t.string :email, :null => false, :default => ""
t.string :phone_number
t.string :encrypted_password, :null => false, :default => ""
## Recoverable
t.string :reset_password_token
t.datetime :reset_password_sent_at
## Rememberable
t.datetime :remember_created_at
## Trackable
t.integer :sign_in_count, :default => 0
t.datetime :current_sign_in_at
t.datetime :last_sign_in_at
t.string :current_sign_in_ip
t.string :last_sign_in_ip
## Token authenticatable
t.string :authentication_token
t.timestamps
end
add_index :users, :email, :unique => true
add_index :users, :reset_password_token, :unique => true
create_table :roles_users, :id => false do |t|
t.references :role, :user
end
end
def self.down
drop_table :users
drop_table :roles_users
end
end
**日志中的错误**
Started POST "/signup" for 127.0.0.1 at 2015-08-07 18:12:54 -0400
Processing by CompanyController#create as HTML
Parameters: {"utf8"=>"✓", "authenticity_token"=>"aAc83zKKlV4w1i2GhTqTo3ehtXP+tPvYbBBRq1ccYzA=", "company"=>{"name"=>"Test Co.", "locations_attributes"=>{"0"=>{"name"=>"Main"}}, "users_attributes"=>{"0"=>{"first_name"=>"John", "last_name"=>"Smith", "full_name"=>"John Smith", "email"=>"john@acme.com", "password"=>"[FILTERED]", "password_confirmation"=>"[FILTERED]"}}}, "commit"=>"Submit"}
User Load (0.5ms) SELECT "users".* FROM "users" WHERE "users"."deleted_at" IS NULL AND "users"."id" = 7 ORDER BY "users"."id" ASC LIMIT 1
Role Load (0.3ms) SELECT "roles".* FROM "roles" INNER JOIN "roles_users" ON "roles"."id" = "roles_users"."role_id" WHERE "roles"."deleted_at" IS NULL AND "roles_users"."user_id" = $1 [["user_id", 7]]
(0.1ms) BEGIN
Location Exists (0.3ms) SELECT 1 AS one FROM "locations" WHERE "locations"."identifier" = '0d759e5405084663a1c110d37f04573a' LIMIT 1
User Exists (0.2ms) SELECT 1 AS one FROM "users" WHERE "users"."email" = 'john@acme.com' LIMIT 1
(0.1ms) ROLLBACK
Completed 422 Unprocessable Entity in 75ms
** [Airbrake] Notice was not sent due to configuration:
Environment Monitored? false
API key set? true
ActiveRecord::RecordInvalid (Validation failed: Locations company can't be blank):
app/controllers/company_controller.rb:10:in `create'
app/controllers/application_controller.rb:95:in `set_time_zone'
Rendered /Users/godzilla/.rbenv/versions/2.1.4/lib/ruby/gems/2.1.0/gems/actionpack-4.1.7/lib/action_dispatch/middleware/templates/rescues/_source.erb (0.9ms)
Rendered /Users/godzilla/.rbenv/versions/2.1.4/lib/ruby/gems/2.1.0/gems/actionpack-4.1.7/lib/action_dispatch/middleware/templates/rescues/_trace.html.erb (1.7ms)
Rendered /Users/godzilla/.rbenv/versions/2.1.4/lib/ruby/gems/2.1.0/gems/actionpack-4.1.7/lib/action_dispatch/middleware/templates/rescues/_request_and_response.html.erb (1.2ms)
Rendered /Users/godzilla/.rbenv/versions/2.1.4/lib/ruby/gems/2.1.0/gems/actionpack-4.1.7/lib/action_dispatch/middleware/templates/rescues/diagnostics.erb within rescues/layout (15.6ms)
它引用了位置标识符已经存在，但它没有。这是在尝试创建新Location时动态制作的（请注意generate_identifier模型中的方法location.rb）。最重要的是，用户也不存在。
如何解决这个问题？
答案 0 :(得分：1)
当您编写validates_presence_of :company时，这意味着您的公司记录必须在创建位置时存在，但尚未完全保存。但是，您的位置仍与公司对象关联，并且无需此验证即可正确保存。我认为您可以在存在company_id时进行验证，因为公司ID在保存期间可用。