Update holder name column to 50 limit constraint

A constraint of 26 characters were added to the holder_name text column.
Unfortunately, the Zuora accepts 50 characters as the limit and when sending data
to GL.com errors were raised. The MR would change the limit to 50 within GL.com database.

Changelog: fixed

app/models/users/credit_card_validation.rb

@@ -8,7 +8,7 @@ module Users
 
     belongs_to :user
 
-    validates :holder_name, length: { maximum: 26 }
+    validates :holder_name, length: { maximum: 50 }
     validates :network, length: { maximum: 32 }
     validates :last_digits, allow_nil: true, numericality: {
       greater_than_or_equal_to: 0, less_than_or_equal_to: 9999

db/migrate/20220310101118_update_holder_name_limit.rb

+# frozen_string_literal: true
+
+# See https://docs.gitlab.com/ee/development/migration_style_guide.html
+# for more information on how to write migrations for GitLab.
+
+class UpdateHolderNameLimit < Gitlab::Database::Migration[1.0]
+  disable_ddl_transaction!
+
+  def up
+    add_text_limit :user_credit_card_validations, :holder_name, 50, constraint_name: new_constraint_name
+    remove_text_limit :user_credit_card_validations, :holder_name, constraint_name: old_constraint_name
+  end
+
+  def down
+    add_text_limit :user_credit_card_validations, :holder_name, 26, validate: false, constraint_name: old_constraint_name
+    remove_text_limit :user_credit_card_validations, :holder_name, constraint_name: new_constraint_name
+  end
+
+  private
+
+  def old_constraint_name
+    check_constraint_name(:user_credit_card_validations, :holder_name, 'max_length')
+  end
+
+  def new_constraint_name
+    check_constraint_name(:user_credit_card_validations, :holder_name, 'max_length_50')
+  end
+end

db/schema_migrations/20220310101118

+e4d6111f19f05b42b51e8d066e221205460514cef88ecf15ca99aa59788c4153
\ No newline at end of file

db/structure.sql

@@ -21129,7 +21129,7 @@ CREATE TABLE user_credit_card_validations (
     network text,
     CONSTRAINT check_1765e2b30f CHECK ((char_length(network) <= 32)),
     CONSTRAINT check_3eea080c91 CHECK (((last_digits >= 0) AND (last_digits <= 9999))),
-    CONSTRAINT check_eafe45d88b CHECK ((char_length(holder_name) <= 26))
+    CONSTRAINT check_cc0c8dc0fe CHECK ((char_length(holder_name) <= 50))
 );
 
 CREATE TABLE user_custom_attributes (

spec/models/users/credit_card_validation_spec.rb

@@ -5,7 +5,7 @@ require 'spec_helper'
 RSpec.describe Users::CreditCardValidation do
   it { is_expected.to belong_to(:user) }
 
-  it { is_expected.to validate_length_of(:holder_name).is_at_most(26) }
+  it { is_expected.to validate_length_of(:holder_name).is_at_most(50) }
   it { is_expected.to validate_length_of(:network).is_at_most(32) }
   it { is_expected.to validate_numericality_of(:last_digits).is_less_than_or_equal_to(9999) }