Are you concerned about issues, maintenance, and crashes in your Ruby on Rails application? It may be time to review the code quality of your application.
Before making any business decisions, it is always preferable to thoroughly understand the problem. But what if you could go further and prevent those problems from the start? This is where maintaining code quality in your Ruby on Rails application comes into play. When the code in your application is of excellent quality, it performs optimally.
Like to learn more about why it’s essential to validate the code quality of your Ruby on Rails application? Check out our blog on Why is it important to validate the code quality of my Ruby on Rails project?
Mallow has been in custom software development for over a decade, and we strongly believe in the importance of adhering to best practices to maintain code quality for all applications. We have witnessed this approach consistently improve the overall quality of the application, as this ultimately results in reduced maintenance hours and a better user experience.
After going through this article, you will understand how to measure the quality of your Ruby on Rails application’s code and discover useful tools that can assist you in the evaluation process.
What attributes define a code with high quality?
Smooth operation and long-term success of your application rely heavily on the quality of the code. Well-written and readable code, adherence to coding standards and best practices, appropriate documentation, efficient algorithms, and effective error handling are some important aspects of code with good quality.
Below mentioned are some points that give you an overview of the fundamental characteristics associated with good code quality.
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What approach needs to be utilised to assess a Ruby on Rails application?
1. Use code analysis tools to evaluate the quality.
To check on the code quality of your Ruby on Rails application, you can use tools like RuboCop, Rubycritic and Reek. Such code analysis tools can help identify code quality issues, such as code smells, anti-patterns, and performance bottlenecks. By identifying these issues, developers can improve the quality of their code and ensure that it is maintainable and scalable.
For example, RuboCop performs a static analysis of the codebase and checks for typical code quality issues such as syntax errors, indentation, and style consistency.
The tool can improve their codebase’s readability, maintainability, and overall quality. The tool can be customised to match the specific needs of the project. It can be integrated with continuous integration and delivery (CI/CD) pipelines to catch issues early in development.
Hence, using code analysis tools can help developers identify and fix issues in their code, resulting in better quality, more secure, and more performant applications.
2. Code complexity metrics
You can use code complexity metrics to evaluate the complexity of your codebase. Metrics like Cyclomatic Complexity, Lines of Code, and Maintainability Index can give you insights into the quality and maintainability of your code. We can use gems like Rubocop, which offers assistance to evaluate these metrics.
3. Performance
The Bullet gem enables developers to build high-performing applications with improved response times and better database optimisation by detecting and handling N+1 queries, suggesting eager loading strategies, and delivering real-time notifications. Integrating the Bullet gem into the development workflow can create a more fluid and efficient application experience for end users.
The PG Hero gem provides powerful tools for improving PostgreSQL database performance for Ruby on Rails developers. Developers may discover and address performance bottlenecks by employing real-time query monitoring, index utilisation analysis, and the detection of database bloat. The PG Hero gem enables developers to fine-tune their apps for the best performance by monitoring disk space utilisation and making query optimisation recommendations.
Performance metrics measure how efficiently the code runs. This includes factors such as response time, memory usage, and CPU utilisation. APM tools like NewRelic, ScoutAPM, and Datadog are commonly used to check performance-related metrics. You also can check Hosted server’s (Cloud infrastructure) metrics to know about the memory and CPU utilisations.
4. Security
Security scanning measures how secure the code is against potential vulnerabilities and Brakeman attacks. To aid in this process, dedicated tools are available, such as Zap, which can assist in scanning and assessing the security of your code. These tools help detect vulnerabilities and provide insights into areas requiring attention or improvement. By incorporating security scanning measures into your development workflow, you can proactively enhance the security posture of your application and safeguard it against potential threats.
Interested in knowing more about security assessment using Brakeman? Check out this documentation from Brakeman.
5. Code Coverage
Code coverage measures how much of a codebase is executed during automated testing. It is an essential metric for maintaining code quality because it helps to identify areas of the code that are not being tested adequately. This also helps to identify bugs and errors, ensure maintainability, support refactoring efforts, and give developers the confidence they need to produce high-quality code. You can use tools like SimpleCov to ensure the code coverage is appropriately handled. Below attached is an image that would give you an idea of what the results from SimpleCov would look like.
Your Go-to Ruby on Rails code quality checklist
Improving your application to achieve its best version is an ongoing process that evolves. Always seeking inspiration and shaping the application to meet your customers’ needs is essential.
Below is a sample checklist to help you maintain good code quality in your Ruby on Rails application. However, remember that this is a fundamental starting point, and you can customise the checklist to suit your specific needs.
What should I do if my application falls short in terms of code quality?
You now have an idea of how to measure the code quality of your Ruby on Rails application. You also have a picture of the best practices you need to follow to maintain the code in good quality and why it is necessary to do so.
You’ll likely find yourself in one of the following two positions.
The first situation would be that your code quality isn’t high. If you find yourself in this position, you need to take action. As your first step, start a conversation with your current development team and show them what you’ve found. This could involve conducting a code review, using automated tools to scan the code, or seeking the input of other experienced developers.
Once the issues have been identified, a plan should be developed to address them. If you’re still uncomfortable, evaluating other development teams may be something you need to look into next.
Are you considering working with Mallow? Please check our blog Is my Ruby on Rails application right fit to be built by Mallow? to ensure whether we are right for you.
The other situation you might find yourself in is your code quality is up to or near the industry standard. If you find this to be the case for you, one important thing to remember is that technology is constantly evolving. And there’s always something new to learn. Keep up with the latest trends, technologies, and programming languages to ensure your code remains cutting-edge and best-in-performance.
Still need any further clarifications or feel like we can help you out in enhancing the code quality of your Ruby on Rails application? Please reach out to our team.
Your queries, our answers
No, Ruby on Rails is not a dying language. While newer frameworks have emerged, Ruby on Rails continues to be widely used, particularly for web applications that require rapid development and scalability. The community around Ruby on Rails remains active, and the framework is regularly updated with new features and security improvements. Check out here to know if Ruby on Rails is still relevant in 2025 and explore its current state and future prospects.
Mallow prioritizes security in every stage of development. We implement best practices like data encryption, secure authentication methods, and regular security audits. Ruby on Rails also has built-in security features, such as protection against SQL injection and cross-site scripting, which we utilize to safeguard your application.
The cost of building a Ruby on Rails application varies depending on the project's complexity, features, and scope. For a basic MVP, the cost ranges from $20,000 to $40,000 for a web app. For more complex applications, the cost can be significantly higher. We provide a detailed and transparent cost breakdown tailored to your specific requirements. Check out here to find out how much building a Ruby on Rails project with Mallow costs.
Yes, Mallow can integrate various third-party services, such as payment gateways, APIs, and external databases, into your Ruby on Rails application. Our team ensures seamless integration to enhance the functionality and user experience of your application.
Yes, we can align our working hours with your time zone to facilitate effective communication throughout the development process. Check out here to know how to handle the timezone difference.
Mallow offers the following outsourcing models: Project-based outsourcing, Staff augmentation, & Dedicated development team (DDT)
Ruby on Rails is a versatile framework that can be adapted to a wide range of projects. It excels in rapid development, making it suitable for startups, MVPs, and complex web applications. Whether you're building a large-scale e-commerce platform or a custom content management system, Ruby on Rails provides the flexibility and efficiency needed to support your project.
Mallow's development team is experienced in designing and implementing scalable Ruby on Rails applications. We use a combination of efficient code architecture, database optimization, and cloud infrastructure to ensure your application can scale to meet growing user demands without compromising performance.
The development timeline varies depending on the complexity and scope of the project. For a basic MVP, it might take around 3 to 6 months. More complex applications with advanced features could take longer. We work closely with you to establish a realistic timeline and keep you informed throughout the development process.
At Mallow, we emphasize thorough testing and quality assurance to ensure the reliability and performance of your Ruby on Rails application. Our QA team conducts various tests, including unit testing, integration testing, and end-to-end testing, to identify and fix issues before deployment.
No, we don’t provide off-the-shelf products. We are custom software solution providers who tailor applications in a customized way as you desire. However, we can create personalized applications tailored to your unique needs, providing you with a fully customized experience when using the application.
Yes, you can hire a dedicated Ruby on Rails developer or a team of developers from Mallow. This allows you to have a dedicated resource working exclusively on your project, providing more control and flexibility over the development process. Check out our article on the top 9 things to consider as you plan to hire a Ruby on Rails developer for more insights.
