![]() ![]() What method does the error reference? (i.e.do I have the correct object class or is my object nil?) What class does the error reference? (i.e.When you debug, ask the following mental questions, in this order, when reading an error message: That means reading error messages carefully and completely before acting so that you understand what it's trying to tell you. When you are trying to debug a problem, good advice is to always: Read The Error Message (RTFM) However, they are more time consuming procedure compared to raising errors, so in most situations they should not be your first step. IRB debuggers like Byebug are useful for deeply analyzing the state of your code as it executes. This byebug variable when executed will open up an ruby IRB session of your code, giving you direct access to the state of objects as they are at that point in the code's execution. Then to use, insert the phrase byebug inside the execution path of the code you want examined.Add gem 'byebug' inside the development group in your Gemfile.To use the byebug gem for debugging in Rails: Only after you have information about the state of your codes execution flow should you consider moving to a ruby gem irb debugger like pry or byebug where you can delve more deeply into the state of objects within your execution path. Fallback: Use a ruby IRB debugger like byebug or pry is it nil?) and for immediately confirming whether a line of code is even getting executed at all within a given context.Ģ. ![]() This technique is useful for quickly examining an object or method ( e.g. foo) on the line that you're trying to debug. inspect information about the object/method (i.e. ![]() In the above code, raise triggers an Exception that halts execution of your code, and returns an error message that conveniently contains. The fastest way to debug Ruby (especially Rails) code is to raise an exception along the execution path of your code while calling. Fast Method: Raise an Exception then and. Those tools should not be your first step.ġ.
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