What are rescue blocks in Ruby on Rails?

What are rescue blocks in Ruby on Rails?

Rescue blocks in Ruby on Rails are used to handle exceptions gracefully. They allow you to define a block of code that will execute if an error occurs, preventing the application from crashing.

Can you give me an example of how to use a rescue block?

Sure! Here's a simple example:

begin
  # Code that might raise an exception
  risky_operation
rescue StandardError => e
  puts "An error occurred: \\#{e.message}"
end

What types of exceptions can I rescue?

You can rescue any subclass of StandardError. Common exceptions include RuntimeError, NoMethodError, and ArgumentError.

Is it a good practice to rescue all exceptions?

It's generally not recommended to rescue all exceptions because it can hide bugs. It's better to rescue specific exceptions that you expect might occur.