Allow use PIN to have more than 6 digits

app/models/user.rb

@@ -20,7 +20,7 @@ class User < ApplicationRecord
   validates :github, format: {with: /\A[a-z0-9][a-z0-9-]{,38}\z/i}, allow_blank: true
   validates :jabber, format: {with: /\A[^@]+@[^@]+\z/}, allow_blank: true
   validates :gpg_fingerprint, format: {with: /\A[0-9a-f]{4}( ?)([0-9a-f]{4}\1){4}\1{0,2}([0-9a-f]{4}\1){4}[0-9a-f]{4}\z/i}, allow_blank: true
-  validates :pin, numericality: true, length: {is: 6}, allow_blank: true, confirmation: true
+  validates :pin, numericality: true, length: {minimum: 6}, allow_blank: true, confirmation: true
   validates :locale, presence: true, inclusion: {in: I18n.available_locales.map(&:to_s)}
   accepts_nested_attributes_for :phone_numbers, update_only: true, allow_destroy: true, reject_if: :all_blank
 

config/locales/simple_form.bg.yml

@@ -17,7 +17,7 @@ bg:
         url: URL, започващ с „http://“ или „https://“
         jabber: Jabber акаунт във формат „[email protected]“
         gpg_fingerprint: Отпечатък на GPG ключ с или без интервали
-        pin: използва се за отключване на вратата и трябва да е 6-цифрено число; оставете празно, ако не искате да го променяте
+        pin: използва се за отключване на вратата и трябва да е число с поне 6 цифри; оставете празно, ако не искате да го променяте
         phone_numbers:
           phone_number: телефонен номер с или без код за държава
       network_device:

config/locales/simple_form.en.yml

@@ -14,7 +14,7 @@ en:
         url: URL beginning with http:// or https://
         jabber: Jabber account in the "[email protected]" format
         gpg_fingerprint: GPG fingerprint with or without spaces
-        pin: it is used to lock/unlock the doors and must be a 6-digit number; leave empty if you do not want to change it
+        pin: it is used to lock/unlock the doors and must be a number with at least 6 digits; leave empty if you do not want to change it
         phone_numbers:
           phone_number: phone number with optional country code
       network_device:

spec/models/user_spec.rb

@@ -238,10 +238,10 @@
       expect(build(:user, pin: nil)).to_not have_error_on :pin
     end
 
-    it "must be a 6-digit number when it's not nil" do
+    it "must be a number with 6 or more digits when it's not nil" do
       expect(build(:user, pin: 123456)).to_not have_error_on :pin
+      expect(build(:user, pin: 1234567890)).to_not have_error_on :pin
       expect(build(:user, pin: 123)).to have_error_on :pin
-      expect(build(:user, pin: 1234567)).to have_error_on :pin
       expect(build(:user, pin: "abcdef")).to have_error_on :pin
     end