Rails rollback when creating user with nested forms -

i'm getting rollback when trying add user db , i'm not sure why.

i have 3 models: 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 

so, when user wants signup need enter company, location, , user information, controlled 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 

the form using standard form_for nested attributes can make in 1 shot when user clicks submit button

** company/new.html.erb **

<%= form_for @company, :url => url_for( :controller => 'company', :action => 'new' ) |f| %>    <div class="form-group">      <%= f.label "company name" %>      <%= f.text_field :name, class: "form-control", placeholder: "acme inc."  %>        <%= f.fields_for :locations | 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 | 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 %>

however, i'm getting rollback in logs isn't happening , can't figure out why.

started post "/signup" 127.0.0.1 @ 2015-08-07 13:49:22 -0400  processing companycontroller#create 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".* "users"  "users"."deleted_at" null , "users"."id" = 7  order "users"."id" asc limit 1    role load (0.3ms)  select "roles".* "roles" inner join "roles_users" on "roles"."id" = "roles_users"."role_id" "roles"."deleted_at" null , "roles_users"."user_id" = $1  [["user_id", 7]]     (0.1ms)  begin    location exists (0.3ms)  select  1 one "locations"  "locations"."identifier" = '3b7febb35ea740488788d43fcc5e989c' limit 1    user exists (0.3ms)  select  1 one "users"  "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)

** company table **

class createcompanies < activerecord::migration    def change      create_table :companies |t|        t.string :name          t.timestamps      end    end  end

** location table **

class createlocations < activerecord::migration    def change      create_table :locations |t|        t.belongs_to :company, index: true        t.string :identifier        t.string :name          t.timestamps      end    end  end

** user table **

class createusers < activerecord::migration    def self.up      create_table(:users) |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 |t|        t.references :role, :user      end    end      def self.down      drop_table :users      drop_table :roles_users    end  end

** error logs **

started post "/signup" 127.0.0.1 @ 2015-08-07 18:12:54 -0400  processing companycontroller#create 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".* "users"  "users"."deleted_at" null , "users"."id" = 7  order "users"."id" asc limit 1    role load (0.3ms)  select "roles".* "roles" inner join "roles_users" on "roles"."id" = "roles_users"."role_id" "roles"."deleted_at" null , "roles_users"."user_id" = $1  [["user_id", 7]]     (0.1ms)  begin    location exists (0.3ms)  select  1 one "locations"  "locations"."identifier" = '0d759e5405084663a1c110d37f04573a' limit 1    user exists (0.2ms)  select  1 one "users"  "users"."email" = 'john@acme.com' limit 1     (0.1ms)  rollback  completed 422 unprocessable entity in 75ms  ** [airbrake] notice not sent due configuration:             environment monitored? false             api key set? true    activerecord::recordinvalid (validation failed: locations company can't 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)

it references location identifier exists, doesn't. made on fly when trying create new location (notice method generate_identifier in location.rb model). on top of that, user doesn't exist either.

any ideas how around problem?

when write validates_presence_of :company means company record has exist @ time of location creation, not saved yet. however, location still associated company object, , saved correctly without validation. think can validate on presence of company_id instead because company id becomes available during saving.