Ruby Raise Exception In Rescue

Ruby provide a nice mechanism to handle exceptions.

Ruby raise exception in rescue.

It places the keyword rescue after any code that would probably throw an exception. In ruby we have a way to deal with these cases that is raise statement. What if you re building a user system and want to raise an exception when the user tries to access an off limits part of the site. We enclose the code that could raise an exception in a begin end block and use rescue clauses to tell ruby the types of exceptions we want to handle.

While some languages only use exceptions for truly exceptional circumstances like run time errors ruby uses exceptions for a wide variety of errors and unexpected results. The begin is omitted and the entire body of the method is subject to exception handling ending. It is to be noted that the body of a method definition is an implicit begin end block. In this article you ll learn how to use the rescue keyword in combination with begin to handle ruby exceptions the most effective way.

Raise is a keyword in ruby which allows us to raise any exception if it found raise will throw an exception and that exception will be caught inside the rescue statement. None of ruby s standard exceptions fit so your best bet is to create a new kind of exception. Ruby s exception handling mechanism is simple. In ruby like in most languages an exception is a way to convey that something went wrong.

In this article we will look at. Ruby s built in exceptions are great but they don t cover every possible use case. How to handle an exception. Become a better developer.

Ruby does require some form of begin to appear before the rescue. To do exception handling we enclose the code that could raise an exception in a begin end block and use one or more rescue clauses to tell ruby the types of exceptions we want to handle. The general syntax for the rescue statement is as follows.