I would recommend Michael Snoyman's book on yesod (http://www.yesodweb.com/ http://www.yesodweb.com/) to get a practical understanding specially from a crud per

I would recommend Michael Snoyman's book on yesod (http://www.yesodweb.com/ http://www.yesodweb.com/) to get a practical understanding specially from a crud perspective. I found this book to be very helpful: http://chimera.labs.oreilly.com/books/1230000000929/pr01.html http://chimera.labs.oreilly.com/books/1230000000929/pr01.htm... For me, using yesod has been quite a revelation. All of the errors in db operations get caught during my cabal build. This link https://github.com/yesodweb/yesod/wiki/ghci https://github.com/yesodweb/yesod/wiki/ghci is something i used to test my db code all within the repl cycle after setting some pg env variables. All in all, its way smoother than many other environments i have worked with.