In Ruby on Rails, the Singleton module is part of the Ruby standard library and is used to enforce that a class has only one instance and provide a global point of access to that instance. This is useful in scenarios where you need exactly one object to coordinate actions across the system.
In Ruby, both include and extend are used to incorporate modules into classes, but they serve different purposes and are used in different contexts. Understanding the difference between these two methods is crucial for effectively organizing and utilizing code in Ruby applications.
Rails 7 introduces optional transaction arguments to the with_lock method, enhancing concurrency control in web applications. Let’s explore the concepts of pessimistic and optimistic locking and how the new features in Rails 7 improve handling nested transactions.
Ruby on Rails provides a powerful and flexible asset pipeline that makes managing and referencing assets like images, stylesheets, and JavaScripts a breeze. Within this system, the AssetUrlHelper module offers several handy methods to generate paths and URLs for your assets. While some of these methods are commonly used, others are less well-known but equally useful.
Rails 7 brings a host of new features and improvements, making it even easier to build robust and maintainable web applications. One of the powerful features available in Rails is the ability to create virtual (or computed/generated) columns in your database tables. In this blog post, we’ll explore how to create a virtual column in Rails 7 along with detailed explanations and examples.
With each new release, Rails introduces innovative features that enhance productivity and make web development a delightful experience. Rails 6 is no exception, bringing a number of eagerly awaited features and changes. This article aims to familiarize you with the key features added to Rails 6 and outline how they can help make your applications better, thus saving valuable development time.
ActiveRecord, the Object-Relational Mapping (ORM) layer for Ruby on Rails, provides several methods to query your database. Among these are any?, exists?, and present?, each with its own nuances and use cases. Understanding the differences between these methods can help you write more efficient and readable code. In this blog post, we’ll explore these methods, their differences, and provide examples to illustrate how they work at the database level.
Rails 8.0 introduces a powerful feature called allow_browser, which allows developers to specify minimum browser versions for their applications. This brings several advantages worth considering.
In Ruby on Rails development, we often need to retrieve specific data directly from the database. Two common methods used for this are pick and pluck. Although both are useful for extracting data, they serve different purposes and it’s important to know when to use each to optimize the performance of your application.
Ruby on Rails is renowned for its elegance and ease of use. Among its many features, string manipulation stands out for its simplicity and efficiency. Today, we’ll explore some lesser-known Rails helpers that can help you write cleaner view code: parameterize, upcase_first, downcase_first, camelize, and to_sentence. These methods are extremely useful in various situations, from text formatting to creating SEO-friendly URLs. Let’s see how each of them works!
Rails 7.1 introduces a new feature that makes it easier to link to models in your views. With this new feature, you can use the link_to helper to generate a link to a model without having to explicitly specify the text of the link. This can make your code more concise and easier to read.
When working with Ruby, you’ll often encounter the use of the shorthand array.map(&:method_name) instead of the more verbose array.map { |element| element.method_name }. This shorthand is not only concise but also elegant. In this blog post, we’ll explore how this trick works and why it’s so useful in Ruby programming.
Routing in Ruby on Rails is a powerful feature that allows you to direct incoming web requests to the appropriate controller and action. Understanding the different types of routes—Nested, Member, Collection, Namespace, Scope, and Customizable—can greatly enhance your ability to structure your application’s URL scheme efficiently. Let’s dive into each type with examples to illustrate their usage and differences.
When working with Ruby, understanding the scope of different types of variables is crucial for writing effective and bug-free code. Two common types of variables you’ll encounter are class variables (@@name) and instance variables (@name). While they might seem similar at first glance, they have distinct behaviors and use cases. This blog post will explain the differences between these variables, their scopes, and when to use each type.
The method presence_in, which is part of ActiveSupport, is used to check if a value is present in a given collection and returns the value if it is present; otherwise, it returns nil. However, it can also raise an ArgumentError if the argument does not respond to the include? method. In this blog post, we will explore the presence_in method, how it works, and common pitfalls to avoid.
Polymorphic associations in Ruby on Rails are a powerful feature that allows a single model to belong to multiple other models using a single association. This is particularly useful when you have a model that can be associated with more than one other model type, without having to specify the model types directly.
Among the essential methods within migrations are self.up and self.down, which are used to define the actions to be performed when migrating up (applying changes) or down (rolling back changes) respectively. In this blog post, we’ll explore the purpose of self.up and self.down, when they are used, and provide examples to illustrate their usage.
In the world of Ruby on Rails development, ensuring data integrity is paramount for building high-quality applications. When dealing with associations between models, it’s essential to retrieve only unique records to maintain accuracy and reliability. Ruby on Rails offers a powerful solution to this challenge through the distinct method, which can be directly applied to models to enforce uniqueness. Let’s explore the concept of distinct in Rails models, its practical applications, and how it contributes to data integrity using a real-world example.
In the world of Ruby on Rails development, mastering the intricacies of layout rendering is essential for building dynamic and engaging web applications. One fundamental concept that every Rails developer encounters is the yield keyword. In this blog post, we’ll explore the significance of yield in Rails layouts and views, its role in rendering content dynamically, and how it enhances the flexibility and modularity of Rails applications.
In the realm of web security, Cross-Site Request Forgery (CSRF) stands as a prominent threat, capable of compromising the integrity and confidentiality of web applications. In this blog post, we’ll delve into what CSRF is, how it can be exploited, and how Ruby on Rails provides built-in protections against this vulnerability.
Setting up a Rails application to work with multiple databases requires careful configuration and consideration. In this guide, we’ll walk through the steps to configure your application for multiple databases, using an example scenario involving a primary database and a secondary database for books.
In Ruby, the compact method is a handy tool when dealing with arrays containing nil values. Let’s delve into its functionality through a practical example:
Ruby on Rails (Rails) is a powerful web development framework known for its robust features and elegant design principles. In this blog post, we’ll delve into some of the core features that make Rails a preferred choice for building web applications.
In the world of Ruby on Rails, mastering **args can unlock a new level of flexibility when handling variable method arguments. **args, short for double splat arguments, allows methods to accept an arbitrary number of named arguments, providing a powerful tool for building more dynamic and adaptable code. Let’s explore **args by comparing a method that utilizes it versus one that doesn’t, showcasing the benefits of this convention.