Allow to create passport without passport map

app/models/passport.rb

@@ -9,7 +9,7 @@ class Passport < ApplicationRecord
 
   has_many :passport_confirmations, dependent: :restrict_with_exception
 
-  accepts_nested_attributes_for :passport_maps
+  accepts_nested_attributes_for :passport_maps, reject_if: :blank_passport_map?
 
   validates :confirmed,
             inclusion: { in: [false], unless: :enough_confirmations? }
@@ -29,4 +29,14 @@ class Passport < ApplicationRecord
   def enough_confirmations?
     passport_confirmations.count >= REQUIRED_CONFIRMATIONS
   end
+
+private
+
+  def blank_passport_map?(passport_map_attributes)
+    passport_map_attributes.all? do |key, value|
+      next true if key.start_with? 'date_'
+
+      value.blank?
+    end
+  end
 end

features/passport_creation.feature

@@ -33,3 +33,8 @@ Feature: Passport creation
     When I fill the passport creation form
     When I click the passport creation button
     Then I see the passport page
+
+  Scenario: only image is uploaded, no fields are filled
+    When I upload "passport_image_1.jpg" as "Изображения"
+    And I click the passport creation button
+    Then I am at "/passports/\d+"

features/step_definitions/stepdefs.rb

@@ -4,6 +4,10 @@ When 'I visit {string}' do |string|
   visit string
 end
 
+Then 'I am at {string}' do |re|
+  expect(page.current_path).to match(/\A#{re}\z/)
+end
+
 When 'I fill form with the following data:' do |table|
   within 'form' do
     table.rows.each do |(key, value)|
@@ -12,6 +16,12 @@ When 'I fill form with the following data:' do |table|
   end
 end
 
+When 'I upload {string} as {string}' do |fixture, field|
+  within 'form' do
+    attach_file field, Rails.root.join('fixtures', fixture)
+  end
+end
+
 When 'I click the button {string}' do |string|
   click_on string
 end