Opened 10 years ago

Closed 10 years ago

#9727 closed (duplicate)

models.CharField(max_length should be maxlength. no underscore.

Reported by: coachjpg Owned by: nobody
Component: Documentation Version: 1.0
Severity: Keywords:
Cc: jpg@… Triage Stage: Unreviewed
Has patch: no Needs documentation: no
Needs tests: no Patch needs improvement: no
Easy pickings: UI/UX:



models.CharField(max_length should be maxlength. no underscore.

class Poll(models.Model):

question = models.CharField(max_length=200)

Following the example on the web page yields the error below. Removing the undescore from maxlength fixes this.

I presume this is a django version skew issue. Perhaps the top of the doc might mention what django version supported?

As a django newbie using the latest debian stable, this was confusing.


Traceback (most recent call last):

File "", line 11, in ?


File "/var/lib/python-support/python2.4/django/core/", line 1319, in execute_manager execute_from_command_line(action_mapping, argv)
File "/var/lib/python-support/python2.4/django/core/", line 1277, in execute_from_command_line

mod_list = [models.get_app(app_label) for app_label in args[1:]]

File "/var/lib/python-support/python2.4/django/db/models/", line 40, in get_app

mod = load_app(app_name)

File "/var/lib/python-support/python2.4/django/db/models/", line 51, in load_app

mod = import(app_name, , , models?)

File "/home/jpg/poll0/../poll0/polls/", line 3, in ?

class Poll(models.Model):

File "/home/jpg/poll0/../poll0/polls/", line 4, in Poll

question = models.CharField(max_length=200)

TypeError: init() got an unexpected keyword argument 'max_length'

jpg@T30:~/poll0$ dpkg -l | egrep "(deb|python)"
ii debconf 1.5.11etch2 Debian configuration management system
ii debconf-i18n 1.5.11etch2 full internationalization support for debcon
ii debian-archive-keyring 2007.07.31~etch1 GnuPG archive keys of the Debian archive
ii debianutils 2.17 Miscellaneous utilities specific to Debian
ii doc-debian 3.1.5 Debian Project documentation, Debian FAQ and
ii gdebi 0.1.6 Simple tool to install deb files
ii iptables administration tools for packet filtering an
ii libapache2-mod-python 3.2.10-4 Apache 2 module that embeds Python within th
ii libcaca0 0.99.beta11.debian-2 colour ASCII art library
ii libcdparanoia0 3.10+debian~pre0-4 audio extraction tool for sampling CDs (libr
ii libcucul0 0.99.beta11.debian-2 low-level Unicode character drawing library
ii libsdl1.2debian 1.2.11-8 Simple DirectMedia Layer
ii libsdl1.2debian-alsa 1.2.11-8 Simple DirectMedia Layer (with X11 and ALSA
ii python 2.4.4-2 An interactive high-level object-oriented la
ii python-apt 0.6.19 Python interface to libapt-pkg
ii python-cairo 1.2.0-1 Python bindings for the Cairo vector graphic
ii python-central 0.5.12 register and build utility for Python packag
ii python-django 0.95.1-1etch2 A high-level Python Web framework
ii python-foomatic 0.7.7 Python interface to the Foomatic printer dat
ii python-glade2 2.8.6-8 GTK+ bindings: Glade support
ii python-gmenu 2.16.1-3 an implementation of the freedesktop menu sp
ii python-gnome2 2.12.4-6 Python bindings for the GNOME desktop enviro
ii python-gnome2-desktop 2.14.0-3 Python bindings for the GNOME desktop enviro
ii python-gnome2-extras 2.14.3-1 Python bindings for the GNOME desktop enviro
ii python-gnupginterface 0.3.2-9 Python interface to GnuPG (GPG)
ii python-gtk2 2.8.6-8 Python bindings for the GTK+ widget set
ii python-ipy 0.52-2 Python module for handling IPv4 and IPv6 add
ii python-libxml2 2.6.27.dfsg-6 Python bindings for the GNOME XML library
ii python-minimal 2.4.4-2 A minimal subset of the Python language (def
ii python-newt 0.52.2-10 A NEWT module for Python
ii python-numeric 24.2-7 Numerical (matrix-oriented) Mathematics for
ii python-pyorbit 2.0.1-5 A Python language binding for the ORBit2 COR
ii python-pysqlite2 2.3.2-2 python interface to SQLite 3
ii python-qt3 3.16-1.2 Qt3 bindings for Python
ii python-selinux 1.32-3 Python bindings to SELinux shared libraries
ii python-semanage 1.8-1 Python bindings for SELinux policy manipula
ii python-sip4 4.4.5-4 Python/C++ bindings generator runtime librar
ii python-support 0.5.6 automated rebuilding support for python modu
ii python-uno 2.0.4.dfsg.2-7etch6 Python interface for
ii python-vte 0.12.2-5 Python bindings for the VTE widget set
ii python-xdg 0.15-1.1 A python library to access s
ii python2.4 2.4.4-3+etch2 An interactive high-level object-oriented la
ii python2.4-minimal 2.4.4-3+etch2 A minimal subset of the Python language (ver
ii ssl-cert 1.0.14 Simple debconf wrapper for openssl
ii xresprobe 0.4.23debian1 X Resolution Probe

Change History (1)

comment:1 Changed 10 years ago by James Bennett

Resolution: duplicate
Status: newclosed

You are using an older packaged version of Django; from Django 1.0 onwards, max_length is correct. Because many, many, many people have attempted to use pre-1.0 versions of Django with the Django 1.0 documentation, please note also that the tutorial contains a section, titled "Errors about max_length", explaining this. If you're using an older version of Django you should use the documentation for the version you're using (Version 0.96, Version 0.95), but if you're just starting out with Django it is highly recommended you begin with the current Django release (1.0.2), since that is the version which will be forward-compatible, whereas pre-1.0 Django versions are not compatible with the Django 1.x release series and will involve serious upgrade headaches for you later on.

Also, please in the future search the ticket tracker for existing reports before filing a new one; this report is a duplicate of #8922, #8199, #8722, #7253, #7007, #6457, #5325, #5259, #5254, #5252, #5240, #5210, #5209, #5194, #5184, #5162, #5159, #5144, #5119 and #5117.

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