| Andrew Cooke | Contents | Latest | RSS | Twitter | Previous | Next


Welcome to my blog, which was once a mailing list of the same name and is still generated by mail. Please reply via the "comment" links.

Always interested in offers/projects/new ideas. Eclectic experience in fields like: numerical computing; Python web; Java enterprise; functional languages; GPGPU; SQL databases; etc. Based in Santiago, Chile; telecommute worldwide. CV; email.

Personal Projects

Lepl parser for Python.

Colorless Green.

Photography around Santiago.

SVG experiment.

Professional Portfolio

Calibration of seismometers.

Data access via web services.

Cache rewrite.

Extending OpenSSH.

C-ORM: docs, API.

Last 100 entries

Consciousness From Max Entropy; Democrats; Harvard Will Fix Black Poverty; Modelling Bicycle Wheels; Amusing Polling Outlier; If Labour keeps telling working class people...; Populism and Choice; Books on Defeat; Enrique Ferrari - Argentine Author; Transcript of German Scientists on Learning of Hiroshima; Calvert Journal; Telephone System Quotes for Cat Soft LLC; Owen Jones on Twitter; Telephone System Quotes for Cat Soft LLC; Possible Japanese Authors; Complex American Literature; Chutney v5; Weird Componentized Virus; Interesting Argentinian Author - Antonio Di Benedetto; Useful Thread on MetaPhysics; RAND on fighting online anarchy (2001); Now Is Cat Soft LLC's Chance To Save Up To 32% On Mail; NSA Hacked; Call Center Services for Cat Soft LLC; Very Good LRB Article on Brexit; Nussbaum on Anger; Credit Card Processing for Cat Soft LLC; Discover new movies on demand in our online cinema; Tasting; Credit Card Processing for Cat Soft LLC; Apple + Kiwi Jam; Hit Me; Increase Efficiency with GPS Vehicle Tracking for Cat Soft LLC; Sudoku - CSP + Chaos; Recycling Electronics In Santiago; Vector Displays in OpenGL; Call Center Services for Cat Soft LLC; And Anti-Aliased; OpenGL - Render via Intermediate Texture; And Garmin Connect; Using Garmin Forerunner 230 With Linux; Payroll Service Quotes for Cat Soft LLC; (Beating Dead Horse) StackOverflow; Current State of Justice in China; Now Is Cat Soft LLC's Chance To Save Up To 32% On Mail; Axiom of Determinacy; Ewww; Fee Chaos Book; Course on Differential Geometry; Increase Efficiency with GPS Vehicle Tracking for Cat Soft LLC; Okay, but...; Sparse Matrices, Deep Learning; Sounds Bad; Applebaum Rape; Tomato Chutney v4; Have to add...; Culturally Liberal and Nothing More; Weird Finite / Infinite Result; Your diamond is a beaten up mess; Maths Books; Good Bike Route from Providencia / Las Condes to Panul\; Iain Pears (Author of Complex Plots); Plum Jam; Excellent; More Recently; For a moment I forgot StackOverflow sucked; A Few Weeks On...; Chilean Book Recommendations; How To Write Shared Libraries; Jenny Erpenbeck (Author); Dijkstra, Coins, Tables; Python libraries error on OpenSuse; Deserving Trump; And Smugness; McCloskey Economics Trilogy; cmocka - Mocks for C; Concept Creep (Americans); Futhark - OpenCL Language; Moved / Gone; Fan and USB issues; Burgers in Santiago; The Origin of Icosahedral Symmetry in Viruses; autoenum on PyPI; Jars Explains; Tomato Chutney v3; REST; US Elections and Gender: 24 Point Swing; PPPoE on OpenSuse Leap 42.1; SuperMicro X10SDV-TLN4F/F with Opensuse Leap 42.1; Big Data AI Could Be Very Bad Indeed....; Cornering; Postcapitalism (Paul Mason); Black Science Fiction; Git is not a CDN; Mining of Massive Data Sets; Rachel Kaadzi Ghansah; How great republics meet their end; Raspberry, Strawberry and Banana Jam; Interesting Dead Areas of Math; Later Taste; For Sale

© 2006-2015 Andrew Cooke (site) / post authors (content).

Using a Directory (Package) for Django's Model

From: "andrew cooke" <andrew@...>

Date: Fri, 26 Jun 2009 15:46:17 -0400 (CLT)

I couldn't find thsi documented, apart from obliquely in bug report -
http://code.djangoproject.com/ticket/2289 - but here's what you do...

Initially, in a simple app, Django assumes that your model classes live in
"models.py".  This location is read by, for example, the manager.

However, that soon becomes cluttered, and the "right way" to handle this
in Python would be to use a package (directory) rather than a single
module (file).

If you do that, and are not careful, all hell breaks loose :o(

Here's how to make it work:

- Call the directory/package "models"
- Inside that package, put all your code.
- On each model set the Meta attribute app_label to the app name
- Create an __init__.py file inside the package
- In the __init__.py file:
-- Import all your models
-- Declare them using __all__

So, for example, if I have a model class Foo in blah.models.foo (ie
blah/models/foo.py) and a model class Bar in blah.models.bar, then in
__init__.py I have:

  from blah.models.foo import Foo
  from blah.models.bar import Bar

  __all__ = ['Foo', 'Bar']

And the declaration of Foo looks like:

  class Foo(Model):
    class Meta:
      app_label = 'blah'

In this way you end up with the objects still "looking as if" they are in
blah.models (in other parts of your code you can import directly from
there) and with the correct meta data for the manager to find and use


Thank you!

From: John Samuel Anderson <john@...>

Date: Thu, 07 Jun 2012 13:31:06 -0400

In my case, I found that Django isn't able to correctly reverse admin
URLs after reorganizing the code into a "models" module. I hope your
trick helps.

Using a Directory (Package) for Django's Model

From: "Will O'Meara" <will.omeara@...>

Date: Tue, 19 Jun 2012 11:59:23 -0400

awesome post! helped me out a ton!

Software Engineer, AxialMarket Corps of Engineers
factum non verbum

45 East 20th Street, 12th Floor
New York, NY 10003
cell: 347-948-9417

The largest network of active deal professionals in the world.

Great post thank you

From: Philipp Rollinger <philipp.rollinger@...>

Date: Sun, 17 Nov 2013 10:57:51 +0100

Thanks for the hint of __all__ - that was missing in my scheme.

You are based in Chile? I was there too! Greetings to Valparaiso and

Mit freundlichen Gr=FC=DFen | Best regards | Saludos Cordiales

*Philipp Rollinger*

Comment on this post