Mastering Ruby exceptions

Source: Honeybadger ebook: Mastering Ruby exceptions

Rescuing Specifc Errors (The Best Way)

Full rescue syntax:

begin
action
rescue ClassError => e
    retry_request
rescue
    send_alert
else
    record_success
ensure
    close_network_connection
else
end 

Method Rescue Syntax

def my_method
...
rescue
...
else
...
ensure
...
end

This is particularly useful if you want to return a “fallback” value when an exception occurs. Here’s an example:

def data
    JSON.parse(@input)
    rescue JSON::JSONError
    {}
end 