A Ruby gem for validating credit card numbers, detecting brands, generating valid numbers, and performing Luhn checks.
CreditCardValidations is a Ruby library designed to validate, detect, and generate credit card numbers. It checks card numbers against known brand patterns (like Visa or MasterCard), verifies them using the Luhn algorithm, and helps ensure data integrity in payment-related applications. The gem simplifies handling credit card data by providing tools for validation, brand identification, and test data creation.
Ruby developers building e-commerce platforms, payment gateways, or any application that processes credit card information and needs reliable validation and brand detection.
Developers choose this gem for its simplicity, extensibility, and Rails integration—it offers a self-contained solution with no external dependencies, supports custom brand rules, and includes utilities like test number generation, making it a versatile tool for payment processing workflows.
:credit_card: ruby gem for validating credit card numbers, generating valid numbers, luhn checks
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The gem has no external dependencies, making it easy to integrate without bloating projects, as highlighted in its philosophy.
Includes ActiveModel validators for straightforward credit card number validation in Rails models, shown in usage examples like validates :number, credit_card_number: {brands: [:amex, :maestro]}.
Allows adding or removing brand definitions via methods like add_brand, supporting custom or regional card types without modifying core code.
Provides a factory to generate random, valid credit card numbers for specific brands, useful for testing, as demonstrated with CreditCardValidations::Factory.random(:amex).
Some card brands, such as Diners Club US and EnRoute, require separate plugins to be loaded, adding setup complexity and potential maintenance overhead.
The gem optionally extends Ruby's String class with methods like credit_card_brand, which can lead to conflicts in projects using other gems that modify core classes.
Niche or newer card types might not be included without custom configuration, and BIN range updates rely on manual data source changes, as noted in the configuration section.