A few options: - The admin app includes an interactive debugger -- you can set breakpoints in your code and then step through. - If you start web2py from the shell via python web2py.py, any print statements in your code will print output to that shell. - At any point in your code, you can raise an HTTP exception<http://web2py.com/books/default/chapter/29/04#HTTP-and-redirect>to immediately return some value to the browser (if it is a compound Python object, you can wrap it in the BEAUTIFY<http://web2py.com/books/default/chapter/29/05#BEAUTIFY>helper for better display). - In the view, you can add {{=response.toolbar()}}, which will enable you to see all the elements in request, response, and session as well as db query timings. - appadmin allows you to see the current content of the cache as well as cache statistics.
Anthony On Wednesday, December 19, 2012 6:49:17 PM UTC-5, Bhaskar Ramachandran wrote: > > Thanks Massimo. Again, i am so new to web development. I learned from > your web2py book that your framework goes through a series of actions and i > am assuming it creates objects in memory and fills these objects with user > data and then processes these objects according to the model, controller > and view code written for that page request. > > Is there a way of looking at the various web2py objects in memory at > different instances of time for one http request ?. For example, when a > user submits a login form from browser, it gets to web2py and then web2py > sets up the enviroment (request, response, cache, session etc objects > created in memory and populated with information contained in that post > request from browser) . > Now is the auth object created in memory with the user inputs of username > and password at this time ?. IF so, how can i see the contents of this > objects at this time before web2py proceeds further?. > > Then web2py runs the model python code and then runs the controller. > Finally the view. I could be changing the content of the objects, for > example, the login form object anywhere in this chain - in model code, > controller code or view code. Can i see how it is modified before it gets > converted to html by the response object ?. And then can i see the final > html code it generated at server side ? > > Finally, when the html code from server reaches the client, the browser > can show me the source code and i get to see what web2py has done. But i > want to see the intermediate actions also.... > > Regards, > Bhaskar > > > On Tuesday, December 18, 2012 11:20:02 PM UTC-6, Massimo Di Pierro wrote: >> >> You cannot do what you ask because it not logically possible. There is no >> web2py global state. There is only a state per request for the duration of >> an http request. >> >> When you open shell you are in a "simulated" http request which does not >> require the server to be on. It is mostly used to programmatically interact >> with the db. >> >> Imagine your web server being hit by many requests at the same time. How >> would you select from the shell which one to interact with? Moreover each >> request lasts ~5ms. >> >> Massimo >> >> >> >> On Tuesday, 18 December 2012 22:16:33 UTC-6, Bhaskar Ramachandran wrote: >>> >>> Thanks for the reply. But then how do i do interactive debug of the >>> web2py objects from the shell...? >>> If I can either have the shell or the webserver running, but not both, >>> then what if i want to run my application and then access the web2py >>> objects in real time from the shell to know its state. ? >>> By the way, what makes it more interesting to learn web2py is this >>> support from others .... Thanks a lot. >>> >>> Regards, >>> Bhaskar >>> >>> >>> >>> >>> On Sunday, December 16, 2012 9:06:30 PM UTC-6, Massimo Di Pierro wrote: >>>> >>>> As you say -S <appname> starts the shell but not the web server. >>>> Without -S it starts the web server. >>>> The reason is that you may want one without the other. >>>> >>>> >>>> On Sunday, 16 December 2012 14:38:53 UTC-6, Bhaskar Ramachandran wrote: >>>>> >>>>> I am new to web2py but very excited to learn and use it on a long term >>>>> from now. >>>>> I am having trouble starting an interactive shell (I am using Windows >>>>> 7 OS and have installed python2.5 and pywin32 but not ipython as i don't >>>>> want ipython shell). >>>>> I have the latest web2py source copied to C:\. >>>>> >>>>> C:\web2py>python web2py.py -S welcome -M >>>>> Sorry, -K only supported for python 2.6-2.7 >>>>> web2py Web Framework >>>>> Created by Massimo Di Pierro, Copyright 2007-2012 >>>>> Version 2.3.1 (2012-12-14 15:24:12) stable >>>>> Database drivers available: SQLite(sqlite3), MySQL(pymysql), >>>>> PostgreSQL(pg8000), IMAP(imaplib) >>>>> WARNING:web2py:import IPython error; use default python shell >>>>> Python 2.5 (r25:51908, Sep 19 2006, 09:52:17) [MSC v.1310 32 bit >>>>> (Intel)] on win32 >>>>> Type "help", "copyright", "credits" or "license" for more information. >>>>> (InteractiveConsole) >>>>> >>> >>>>> >>>>> I get the shell but it does not start the browser. Even if i start the >>>>> browser and enter http://127.0.0.1:8000/welcome/default/index it >>>>> doesn't work. >>>>> But if i try a non-interactive shell such as the following, i am able >>>>> to start the server and see the welcome page... >>>>> >>>>> C:\web2py>python web2py.py >>>>> Sorry, -K only supported for python 2.6-2.7 >>>>> web2py Web Framework >>>>> Created by Massimo Di Pierro, Copyright 2007-2012 >>>>> Version 2.3.1 (2012-12-14 15:24:12) stable >>>>> Database drivers available: SQLite(sqlite3), MySQL(pymysql), >>>>> PostgreSQL(pg8000), IMAP(imaplib) >>>>> ------ >>>>> I get the pop up window to enter admin password and start the server >>>>> and everything works except an interactive shell... >>>>> >>>>> Please help. >>>>> Thank you >>>>> Bhaskar >>>>> >>>>> >>>>> >>>>> >>>>> >>>>> --
