How to get started with web2py's Debug? - very basic questions

[Rob_McC]

I have used debuggers before, and I want to use web2py debug feature.

1. I create a new simple app,
2. bring up db.py file
3. go to line 10, press [toggle breakpoint]  button
4. get this error

Set Breakpoint on /Users/robxxx/Documents/xxxxr_web2py_1_99/web2py/web2py.app/Contents/Resources/applications/RAM_Simple_Insert/models/db.py at line 10: Line /Users/robsss/Documents/signaturr_web2py_1_99/web2py/web2py.app/Contents/Resources/applications/RAM_Simple_Insert/models/db.py:10 does not exist

I've searched web2py forums lots of references to debug with other editors etc.
- but I just can't get started.

It will be helpful to my learning,  if I can observer variables in the Debug window. (

WEB2PY ONLINE DEBUGGER

Found this, but it doesn't talk about how to debug in web2py
http://stackoverflow.com/questions/315165/how-to-debug-web2py-applications

Thanks!
Rob

[Anthony]

Does the problem exist in trunk? If so, maybe submit an issue -- looks like a bug.

Anthon

[Massimo Di Pierro]

Do you have this file:

/Users/robsss/Documents/signaturr_web2py_1_99/web2py/web2py.app/Contents/Resources/applications/RAM_Simple_Insert/models/db.py

[Anthony]

It sounds like he actually opened that file in the admin editor and hit the toggle breakpoint button, which yielded the error.

[Rob_McC]

Q:
>Do you have this file?

A:
. Sure, it is just the default file when I created the simple app to learn how to use debug-
   Here it  is, also attached.

Thanks for looking at this.
R

# -*- coding: utf-8 -*-
# this file is released under public domain and you can use without limitations

#########################################################################
## This is a samples controller
## - index is the default action of any application
## - user is required for authentication and authorization
## - download is for downloading files uploaded in the db (does streaming)
## - call exposes all registered services (none by default)
#########################################################################

def index():
    """
    example action using the internationalization operator T and flash
    rendered by views/default/index.html or views/generic.html
    """
    response.flash = "Welcome to web2py!"
    return dict(message=T('Hello World'))

def user():
    """
    exposes:
    http://..../[app]/default/user/login
    http://..../[app]/default/user/logout
    http://..../[app]/default/user/register
    http://..../[app]/default/user/profile
    http://..../[app]/default/user/retrieve_password
    http://..../[app]/default/user/change_password
    use @auth.requires_login()
        @auth.requires_membership('group name')
        @auth.requires_permission('read','table name',record_id)
    to decorate functions that need access control
    """
    return dict(form=auth())


def download():
    """
    allows downloading of uploaded files
    http://..../[app]/default/download/[filename]
    """
    return response.download(request,db)


def call():
    """
    exposes services. for example:
    http://..../[app]/default/call/jsonrpc
    decorate with @services.jsonrpc the functions to expose
    supports xml, json, xmlrpc, jsonrpc, amfrpc, rss, csv
    """
    return service()


@auth.requires_signature()
def data():
    """
    http://..../[app]/default/data/tables
    http://..../[app]/default/data/create/[table]
    http://..../[app]/default/data/read/[table]/[id]
    http://..../[app]/default/data/update/[table]/[id]
    http://..../[app]/default/data/delete/[table]/[id]
    http://..../[app]/default/data/select/[table]
    http://..../[app]/default/data/search/[table]
    but URLs must be signed, i.e. linked with
      A('table',_href=URL('data/tables',user_signature=True))
    or with the signed load operator
      LOAD('default','data.load',args='tables',ajax=True,user_signature=True)
    """
    return dict(form=crud())

On Monday, August 13, 2012 2:27:42 PM UTC-4, Massimo Di Pierro wrote:

[Rob_McC]

Anthony:

>It sounds like he actually opened that file in the admin editor and hit the toggle breakpoint button, which yielded the error.

. Yes, that is what I did-
  Note:
  Tried in

Version 1.99.7  and

Version 2.0.0 (2012-08-09 04:44:17) dev

thanks.

Rob

[Luther Goh Lu Feng]

I am also trying the "toggle breakpoint" function.... 

I click on the button and it seems to just hang my web2py application. This is very much off an almost fresh web2py app created....

[Rob_McC]

Mine doesn't hang, I just get this error.. on a default type of app.


Set Breakpoint on /Users/robooo/Documents/signa_web2py_2_00/web2py/web2py.app/Contents/Resources/applications/welcome/controllers/default.py at line 1: Line /Users/robooo/Documents/signa_web2py_2_00/web2py/web2py.app/Contents/Resources/applications/welcome/controllers/default.py:1 does not exist

Rob.

[nc]

I've encountered this problem too. I edited my app's controller/default.py file from the admin interface, clicked on line 34, clicked "toggle breakpoint", and got the message "... controllers\default.py:34 does not exist." This is with web2py 2.0.9. Is that the expected usage of the "toggle breakpoint" button?

[Massimo Di Pierro]

What browser?

Massimo

[gtrz...@gmail.com]

I have just installed web2py (on Windows) and having the same problem with online debugger - yet I don't see even a hint on what to do even though it was mentioned over a year ago?

Has anyone found the solution?

[黄祥]

had you already set the debug trace in your code?

from gluon.debug import dbg
dbg.set_trace()

best regards,

stifan

[gtrz...@gmail.com]

Thank you Stifan for your reply

Setting breakpoint programmatically triggered a breakpoint in the debug window which now gives me a way to debug. As a web2py noob I expected I will be able to set a breakpoint clicking on the line number in the Editor or adding breakpoint from Breakpoint window but these two options still render the error ("line doesn't exist").

Cheers

Greg

[Mariano Reingart]

dbg.set_trace() should not be needed if breakpoints are used via the
web user interface.

The "line not found" issue It is a problem in py2exe and linecache
python module, I made a pull request with a patch.

In the meantime, you could use the source code version of web2py, that
should work as long you don't add new lines to the controller/model.

If you can, please confirm that the new patched version (when
released) works as expected.

Thanks for reporting!

Best regards,

Mariano Reingart
http://www.sistemasagiles.com.ar
http://reingart.blogspot.com

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[Osswalt]

This is an old post but I just have the same issue on web2py v2.10.3 on OSX Yosemite 10.10.3

Wherever I try to toggle a breakpoint in the IDE I got the "... line..does not exist" error. Even if I go to the debug form and manually add a breakpoint I got the same error. Seems something related to the filesystem??? I tried to move the web2py folder to different location in my map from application to desktop to other place. I also tries to give full permission access to the involved files.... but the error doesn't change.

Any hint?

[Massimo Di Pierro]

Can you please open a ticket about this?

[Osswalt]

OK just posted ticket #924

http://github.com/web2py/web2py/issues/924 

Greg