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Agile Web Development Using Rails 6

When Things Go Wrong

Understand how to handle common errors in Rails by exploring typo-induced bugs and URL issues. Learn to use Rails’ web console to debug and evaluate code, gain confidence in verifying your Rails installation, and prepare for building real applications.

We'll cover the following...

Let’s start by introducing a typo in the source code (highlighted in the below code) that perhaps was introduced by a misfiring autocorrect function in your favorite editor:

Typing
Ruby
class SayController < ApplicationController
  def hello
    @time = Time.know 
  end
  def goodbye
  end 
end

Demonstration of typos

Run the application provided below to see the typo error.

Bud1
ocblobappIlocblobA.������appbwspblob�bplist00�


]ShowStatusBar[ShowPathbar[ShowToolbar[ShowTabView_ContainerShowSidebar\WindowBounds[ShowSidebar		_{{3, 67}, {1437, 808}}	%1=I`myz{|}~��appvSrnlongbabel.config.jsIlocblob�.������binIlocblob.������configIlocblob�.������	config.ruIlocblob�.������dbIlocblobg.������GemfileIlocblobA�������libIlocblob��������package.jsonIlocblob�������postcss.config.jsIlocblob��������publicIlocblob��������RakefileIlocblobg�������storageIlocblobA������testIlocblob�������vendorIlocblob������ @� @� @� @E
DSDB `� @� @� @
This will show the typo errors as discussed above

This is similar to what we saw before, but in place of source code we see a list of possible routes, how they can be accessed, and the controller action they’re associated with. We’ll explain all of this in detail ...