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3110 snippets

Snippet List

Load response.content in browser (for debugging)

When debugging tests you frequently need to inspect response content, making a pdb. set_trace() breakpoint and printing response.content but html isn't enough human readable (even for programmers :D) so, why not open it in your browser? Suposse you save this code in utils.py and you break your testcase as this: response = self.client.get(self.url) import pdb; pdb.set_trace() Then: (pdb) from utils import load_response_on_firefox (pdb) load_response_on_firefox(response) Ta-Da!

  • debug
  • testing
  • response
  • response.content
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DisableableSelectWidget

A Select widget that allows choices to be disabled. Specify `disabled_choices` to indicate which choices should be present in the list, but disabled. A possible use case for this is a form that displays data that can be edited by privileged user's but only viewed by others.

  • form
  • select
  • widget
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Restructuredtext directive for photolouge

Directive for inserting images using photolouge in django. Usage: Just make a .py with this code and import it in some apps models.py Or make a custom formatter with django-template-utils.

  • image
  • insert
  • rst
  • directive
  • photolouge
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Django mediagenerator folder bundler

This code will put an entire folder into your media bundle - instead of having to write out every file in a given folder: *It assumes your static root is a absolute directory* **Usage** MEDIA_BUNDLES = ( ('init.js', 'coffeescript/init.coffee', ), bundle_builder('libraries.js', 'javascript/vendor'), bundle_builder('main.js', 'coffeescript', exclude=['init.js',]), bundle_builder('templates.js', 'eco'), ) **Notes** You may wish to use [cache_utils](http://pypi.python.org/pypi/django-cache-utils) or similar to avoid crawling the filesystem every time the site loads

  • django
  • wildcard
  • django-mediagenerator
  • mediagenerator
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Transparently encrypt ORM fields using OpenSSL (via M2Crypto)

Sometimes you need to store information that the server needs in unencrypted form (e.g. OAuth keys and secrets), but you don't really want to leave it lying around in the open on your server. This snippet lets you split that information into two parts: * a securing passphrase, stored in the Django settings file (or at least made available via that namespace) * the actual secret information, stored in the ORM database Obviously, this isn't as secure as using a full blown key management system, but it's still a significant step up from storing the OAuth keys directly in the settings file or the database. Note also that these fields will be displayed unencrypted in the admin view unless you add something like the following to ``admin.py``: from django.contrib import admin from django import forms from myapp.fields import EncryptedCharField class MyAppAdmin(admin.ModelAdmin): formfield_overrides = { EncryptedCharField: {'widget': forms.PasswordInput(render_value=False)}, } admin.site.register(PulpServer, PulpServerAdmin) If Django ever acquires a proper binary data type in the default ORM then the base64 encoding part could be skipped. This snippet is designed to be compatible with the use of the South database migration tool *without* exposing the passphrase used to encrypt the fields in the migration scripts. (A migration tool like South also allows you to handle the process of *changing* the passphrase, by writing a data migration script that decrypts the data with the old passphrase then writes it back using the new one). Any tips on getting rid of the current ugly prefix hack that handles the difference between deserialising unencrypted strings and decrypting the values stored in the database would be appreciated! Sources of inspiration: [AES encryption with M2Crypto](http://passingcuriosity.com/2009/aes-encryption-in-python-with-m2crypto/) [EncryptedField snippet](http://djangosnippets.org/snippets/1095/) (helped me improve several Django-specific details)

  • fields
  • encryption
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Fetching list of SQL queries executed so far for all requests

These snippets together give you the ability to view all Django SQL queries executed across all incoming requests by visiting a particular URL (`/profiling` in the example). This is useful when developing with the Django test server. This is useful if most of the incoming requests are AJAX requests, because in such cases the debug toolbar will not be able to show which queries got executed. The `SqlProfilingMiddleware` class is the key one. At the end of every incoming request it appends the executed SQL queries to a static class member list. Any information request profiling information can be added in this way. The snippet does not add any security around viewing such information. This was done just to keep the code simple. But when implementing this you will definitely want to restrict access to this URL to only people allowed to view such information.

  • sql
  • debugging
  • profiling
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Timing Django Requests

Adds an 'X-Django-Request-Time' HTTP response header that times how long django spent processing the request.

  • middleware
  • http
  • headers
  • profiling
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MultiFileWidget

This is a multi file upload widget. That does not require adding multiple file input fields. It requires jQuery.MultiUpload (http://www.fyneworks.com/jquery/multiple-file-upload/)

  • newforms
  • upload
  • multi-file-upload
  • file
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Timestamps in Model

A simple way to add `date_created` and `date_modified` timestamps to a model. Adds a `date_created` timestamp when the object is first created and adds a `date_modified` timestamp whenever the item is saved. **Note:** You might be tempted instead to use: `date_created=models.DateTimeField(default=datetime.now())` but that won't work as Python will calculate `datetime.now()` only once when it interprets your model. This means that every object created will get the same `date_created` timestamp until you restart your server.

  • python
  • save
  • timestamp
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RestfulView

In the same vein as [snippet 436](http://www.djangosnippets.org/snippets/436/), this allows you to differentiate view logic by HTTP method such as GET, POST, PUT, DELETE. This is also very useful combined with the [HttpMethodsMiddleware snippet](http://www.djangosnippets.org/snippets/174/). I am not the author, but I have found it to be very helpful.

  • rest
  • http
  • urlconf
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backupdb command

`backupdb` command allows to make a database backup automatically. It's supposed to do this just before a `syncdb`, `reset` or `flush` command in a server deployment. A usual upgrade task in production server could be: ./manage.py backupdb ./manage.py reset myapp ./manage.py syncdb Put this code in your project's `management/commands/backupdb.py` file.

  • management
  • command
  • django-admin
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Async PIL resize of images

Call resize_image to replace the image with a resized and normalized version of itself. I recommend doing this with celery, but you could also hook it up to the admin interface if you're not impatient.

  • Images
  • PIL
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humanize time difference (how long ago)

If you ever have a need to display something like: "last update 5 days ago" "user logged in 2 mins ago" you can use this script to determine how long ago a timestamp is versus now().

  • time
  • now
  • humanize
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