Pry Cheat Sheet

gistfile1.md

Pry Cheat Sheet

• Youtube Tutorial 2013

Command Line

• pry -r ./config/app_init_file.rb - load your app into a pry session (look at the file loaded by config.ru)
• pry -r ./config/environment.rb - load your rails into a pry session

Debugger

• help ls -- Display command options for pry command ls
• ls <Object> -- Show all of the available methods that can be called by an object
• _ -- Last eval
• ? <Object> -- Shows more information (doc) about an object, or method
• _file_ -- Represent the last file Pry touched
• wtf? -- Print the stack trace, same as _ex_.backtrace
• $ -- Show source, shortcut for show-source
• edit Class -- Open file in $EDITOR
• edit Class#instance_method -- Open file in $EDITOR
• <ctrl+r> -- Search history
• _out_ -- Array of all outputs values, also _in_
• cd <var> -- Step into an object, change the value of self
• cd .. -- Take out of a level
• binding.pry -- Breakpoint
• edit --ex -- Edit the file where the last exception was thrown
• .<Shell> -- Runs the command
• whereami -- Print the context where the debugger is stopped
• whereami 20 -- Print the context 20 lines where the debugger is stopped
• ; -- Would mute the return output by Ruby
• play -l -- Execute the line in the current debugging context

pry-nav

• next -- execute next line
• step -- step into next function call
• continue -- continue through stack

pry-rescue

• rescue rspec -- break on exception in rspec
• rescue rails server -- break on exception in rails server
• try-again -- run last failing spec, reloads the file not the enviornment