Automatically printing display of model object's data

[Brian Ray]

Here I have a silly function for pretty printing any model object's
data.

def pprint(res):

 for instr in dict(res.__dict__):
   if instr[-3:] == "_id":
  instr = instr[:-3]

   displaymeth = "get_%s_display" % instr
   try:
  atr =getattr(res,displaymeth)
   except:
  atr =getattr(res,instr)
   print "%s: %s" % (instr,atr)


It sort of prints out an easy to read representation of any model
object.  Is there a better way to do this? I am sure there was
something already in Django to do this, but I am having a hard way of
finding.  I am still on .96

Thanks, Brian Ray






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Chicago Python User Group: Customize Django Admin

[Brian Ray]

Hello:

I will be presenting tonight at ChiPy http://chipy.org If anyone is
around Chicago tonight, feel free to stop in.   Here is the official
announcement http://mail.python.org/pipermail/chicago/2010-June/006863.html

thanks, Brian Ray
http://twitter.com/brianray

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Re: Session problems

[Brian Ray]

Jakub:

Why not temporarily switch to SCGI and see if the symptoms goes away?
You need to concrete-ize this problem.

BTW, is the cookie even being set on the browser. What version of
mod_python? Did you compile yourself?

Graham:

This behavior has been seen with mod_python under certian instances.
For example how to the settings in httpd.conf effect this? For example,
 "PythonAutoReload On" and apache's MaxRequestsPerChild 1.  Maybe they
can aggravate a problem when something else is going wrong. I am just
saying, I can see other places on the mod_python list where sessions
were not working properly for many reasons.

I can recall once I build mod_python linking to the wrong libraries,
and some strange stuff happened. 

-- Brian Ray (http://kazavoo.com)


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Apache Authentication

[Brian Ray]

I see it's possible to `Authenticate against Django database from
Apache <http://www.djangoproject.com/documentation/apache_auth/>`_. I
would like to experiment with using Apache Authentication for Django
instead of a login webpage, as well. Likewise, I would like to use
mod_python. I am having trouble writing my  section of my
httpd.conf to handle both. Can this be done? If so, does anybody have a
working example.

Regards, Brian Ray
http://brianray.chipy.org

Re: Apache Authentication

[Brian Ray]

Hi Adrian:

When placed together, I do get asked for Authentication from browser.
When good credentials are provided, I do get through but then an error
is displayed.

I would like to determine wether or not I am doing something wrong.
Otherwise, can log this intro Trac as a feature request?

-- Brian

More details


RHEL3
Django recently updated from SVN Head
Apache/2.0.54 (Unix) DAV/2 SVN/1.1.4 mod_python/3.1.4 Python/2.4.2
Server

httpd.conf:


   SetHandler python-program
   PythonHandler django.core.handlers.modpython
   SetEnv DJANGO_SETTINGS_MODULE myproject.settings
   PythonPath "['/home/django/projects'] + sys.path"
   PythonDebug On

AuthType basic
AuthName "example.com"
Require valid-user

SetEnv DJANGO_SETTINGS_MODULE myproject.settings
PythonAuthenHandler django.contrib.auth.handlers.modpython





Displayed to browser:

Mod_python error: "PythonAuthenHandler
django.contrib.auth.handlers.modpython"

Traceback (most recent call last):

  File "/usr/local/lib/python2.4/site-packages/mod_python/apache.py",
line 299, in HandlerDispatch
result = object(req)

  File
"/usr/local/lib/python2.4/site-packages/django/contrib/auth/handlers/modpython.py",
line 20, in authenhandler
staff_only = _str_to_bool(options.get('DjangoRequireStaffStatus',
"on"))

TypeError: 'tuple' object is not callable

Apache's error log's say the same thing.

Re: Apache Authentication

[Brian Ray]

Adrian,

I took a look at modpython.py. I changed line 16 to:

_str_to_bool = lambda s: s.lower() in ('1', 'true', 'on', 'yes')

Note the parethesis.
Seems to work now. Cool, Thanks!

Re: Apache Authentication

[Brian Ray]

Anouther issues with Authenticating this way, the Django user is still
Anonymous although the REMOTE_USER is not:

,
POST:,
COOKIES:{},
META:{'AUTH_TYPE': 'Basic',
 'CONTENT_LENGTH': 0L,
 'CONTENT_TYPE': None,
 'GATEWAY_INTERFACE': 'CGI/1.1',
 'HTTP_ACCEPT': '*/*',
 'HTTP_ACCEPT_ENCODING': 'gzip, deflate',
 'HTTP_ACCEPT_LANGUAGE': 'en',
 'HTTP_AUTHORIZATION': 'Basic YnJILikeBeEROnSatURdayNA==',
 'HTTP_HOST': 'localhost:8080',
 'HTTP_MAX_FORWARDS': '10',
 'HTTP_USER_AGENT': 'Mozilla/5.0 (Macintosh; U; PPC Mac OS X; en)
AppleWebKit/412.7 (KHTML, like Gecko) Safari/412.5',
 'HTTP_X_FORWARDED_FOR': '10.1.5.112',
 'HTTP_X_FORWARDED_HOST': 'www.foo.com',
 'HTTP_X_FORWARDED_SERVER': 'foo.com',
 'PATH_INFO': '/',
 'PATH_TRANSLATED': None,
 'QUERY_STRING': None,
 'REMOTE_ADDR': '127.0.0.1',
 'REMOTE_HOST': None,
 'REMOTE_IDENT': None,
 'REMOTE_USER': 'bray',
 'REQUEST_METHOD': 'GET',
 'SCRIPT_NAME': None,
 'SERVER_NAME': 'foo.com',
 'SERVER_PORT': 0,
 'SERVER_PROTOCOL': 'HTTP/1.1',
 'SERVER_SOFTWARE': 'mod_python'},
user:AnonymousUser>'

So, request.user.is_anonymous() returns True.

I do know know what made me think
django.contrib.auth.handlers.modpython would start a session
automatically. Instead, it just gives Apache the ok to let the request
through to Django.

Would it be appropriate to take the HOST_USER from the request object
and just log the user in after the Apache Authentication by setting
request.session and request.user? More important, is this safe? If so,
this is fine by me.

Regards, Brian Ray

Re: Apache Authentication

[Brian Ray]

Thanks Ian. But, this is not really what I am doing here. I do not
want to create users from Apache.

Kind Regards, Brian

Re: Apache Authentication

[Brian Ray]

This is in my view *after* the Authenticaion:

def login(request):
   user = users.get_object(username__exact=request.META['REMOTE_USER']
   request.session[users.SESSION_KEY] = user.id
   request.user = user
   # do something else ...

Seems to make both Django and Apache happy.

Regards, Brian

btw, I will fill out a Trac ticket for the modpython.py fix, just in
case this thread get's lost in cyberspace.

Model Inheritence

[Brian Ray]

I am trying to take some data schemes already setup in SQLObject and
use the Django model-api instead.

My SQLObject has things like:

class account(SQLObject):
   accountsaccessrequest   = MultipleJoin('accountsaccessrequest')

class accountsaccessrequest(SQLObject):
   account=  ForeignKey('account')

So I tryed to convert this with:

class account(meta.Model):
   accountsaccessrequest   =
meta.ManyToManyField(accountsaccessrequest)

class accountsaccessrequest(meta.Model):
   account= meta.ForeignKey(account)

Although, this clearly will not work because 'accountsaccessrequest' is
not yet defined.

I got around the validation error by making a accountsaccessrequest the
prototype, "class accountsaccessrequest(meta.Model): pass". Although
this tried to make two tables and would not work either.

Any ideas how I should proceed. Workarounds?

Kind Regards,

Brian Ray

Database API Boolean Queries

[Brian Ray]

Is there a full-proof way to query a Boolean Field?

For Boolean matching I have been sending anything representative of
true or false as string, "t" here for PostgreSQL
<http://www.postgresql.org/docs/8.1/static/datatype-boolean.html>:

beerlist = beers.get_list(domestic__exact="t");

Alhtough, I am unsure if this will work if I switch Database platforms.
Is there a better way?

Thanks, Brian Ray
bray sent com
http://brianray.chipy.org

Re: django interface

[Brian Ray]

Reread the section "Serving the admin files" from
<http://www.djangoproject.com/documentation/modpython/>.

So, you have to move or point to the location of the media files and
they need to be accessable from Apache.

hth, Brian Ray
bray sent com
http://brianray.chipy.org

Manipulator Change calls INSERT

[Brian Ray]

I get an SQL error when trying to Change an already displayed form
field.

When loggedin() returns True and changes have already been made at are
currently trying to be submitted, this view is still tries to INSERT:

def changeaccount(request):
   uid = '-1'
   if loggedin(request.user):
  uid = request.user.id
  thisuser = accounts.get_object(uid__exact=uid)
  manipulator = accounts.ChangeManipulator(thisuser.id)
  thisaccount = manipulator.original_object
   else:
  manipulator = accounts.AddManipulator()

   if request.POST:
  new_data = request.POST.copy()
  errors = manipulator.get_validation_errors(new_data)
  if not errors:
 manipulator.do_html2python(new_data)
 manipulator.save(new_data)
 return HttpResponseRedirect('/thanks')
   else:
  errors = new_data = {}
  if loggedin(request.user):
 new_data = thisaccount.__dict__
   form = formfields.FormWrapper(manipulator, new_data, errors)
   return render_to_response('nwmail/account', {'form': form,
  'uid':uid,
  'loggedin':loggedin(request.user),
  'searchbar':searchbar(request),
  'crumbsbar':crumbsbar(request),
   })


The manipulator is a AccountManipulatorChange. I double checked by
calling HttpResponse on manipulator.__class__.__name__.

I do use a "_pre_save" in my model and I was wondering if this somehow
was causing this unexpected behaviour.

tia,

Brian Ray
<http://brianray.chipy.org> aim: brianray34

Any Django developers in Chicago?

[Brian Ray]

Hey all,

We are having a Django focused meetup with ChiPy (Chicago Python User 
Group) tomorrow night:

RSVP

http://chipy.org and/or http://www.meetup.com/_ChiPy_/events/220117890/


Talks will be recorded. Also looking for more talks.


Hope to see some of you there.

Warm Regards, Brian Ray

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