Login

3112 snippets

Snippet List

Make hyperlinks for labels of raw_id_fields (jQuery)

The Django Admin site provides a "raw ID" feature for foreign keys that reference large tables. In the form view, the label of the referenced object will appear after the input. This snippet will make that label into a hyperlink that takes you to the form view for that object. To use this snippet, copy base_site.html into your templates/admin directory (if you haven't already), and paste this code into that file somewhere after the 'extends "admin/base.html"' directive. If you are already using jQuery, you can remove the first script tag. If you are already extending "extrahead", just paste the script tag(s) into the block you have created. [Documentation for raw_id_fields](http://docs.djangoproject.com/en/dev/ref/contrib/admin/#django.contrib.admin.ModelAdmin.raw_id_fields)

  • admin
  • jquery
  • raw_id_fields
Read More

Encoding datetime for JSON consumers like YUI

Passing datetimes from Python to a [YUI DataTable](http://developer.yahoo.com/yui/datatable/) via JSON served by [django-piston](http://bitbucket.org/jespern/django-piston/) turned out to be surprisingly rocky. This code actually works with ``YAHOO.lang.JSON.stringToDate`` (*not* ``YAHOO.util.DataSource.parseDate``) which cannot handle time zone specifiers other than "Z" or dates without timezones. The YUI [DataSource](http://developer.yahoo.com/yui/datasource/) which uses this looks something like this - note that simply setting ``format:"date"`` does not work as that uses ``YAHOO.util.DataSource.parseDate``, which uses``Date.parse`` to do the actual conversion, which will involve browser-specific formats and as of this writing only Chrome's native ``Date`` can reliably parse ISO 8601 dates. myDataSource.responseSchema = { resultsList: '…', fields: [ … { key: 'my_date_field', parser: YAHOO.lang.JSON.stringToDate }, ], … };

  • javascript
  • date
  • json
  • iso8601
Read More

fast table flush without raw SQL

Perhaps you don't want to drop a table, but you also want to do something faster than Model.objects.all().delete() but without resorting to raw SQL. This function, clear_tables, will call the sql_flush operation on a list of tables.

  • delete
  • flush
  • fast
Read More

UnicodeFixer

This snippet is for resolve the Django-PyAMF unicode problems, through the django force_unicode function called recursively, with a tuple of different charsets.

  • unicode
  • utf-8
  • object
  • latin-1
  • force_unicode
  • pyamf
Read More

grep and delete sqlite tables

This is a slight improvment of a previous snippet of mine: http://www.djangosnippets.org/snippets/1776/ It is an interactive shell script that greps and deletes sqlite tables USAGE: ./pdrop.sh myquery mydbfile

  • db
  • sqlite
  • drop
Read More

PartialRequiredMultiValueField

Allows the whole widget to be required but still have optional fields in it. For instance we have a NameField, which takes a firstname and lastname and optionally a middlename. With this we can just have 1 widget.

  • form
  • multivaluefield
Read More

rss news

publish tldrelative rss news exampled web.montao.com.br/li

  • rss
  • google
  • app
  • gae
  • engine
  • news
Read More

Accordion changelist admin

Allows you to hide the filters in the pages of lists of admin. Very useful when filters hide one or more columns. Add this code after the block "extrastyle"

  • admin
  • changelist
Read More

Past days template filter

Returns a list of date objects for a given number of past days, including today. Useful for summaries of recent history. Inspired by [Template range filter](http://www.djangosnippets.org/snippets/1357/)

  • template
  • filter
  • date
Read More

Template tag to clear cached template fragment

This is a custom template tag that clears the cache that was created with the **cache** tag. {% load clearcache %} {% clearcache [fragment_name] [var1] [var2] .. %} Create **app/templatetags** folder with **__init__.py** and copy code into **clearcache.py** file. polls/ templatetags/ __init__.py clearcache.py Based on django.templatetags.cache. See Django docs on [custom template tags](http://docs.djangoproject.com/en/dev/howto/custom-template-tags/)

  • template
  • cache
  • clear
  • fragment
Read More

Variable._resolve_lookup monkeypatch

There are times when you want to hook into the Variable class of django.template to get extra debugging, or even to change its behavior. The code shown is working code that does just that. You can monkeypatch template variable resolution by calling patch_resolver(). I recommend using it for automated tests at first. My particular version of _resolve_lookup does two things--it provides some simple tracing, and it also simplifies variable resolution. In particular, I do not allow index lookups on lists, since we never use that feature in our codebase, and I do not silently catch so many exceptions as the original version, since we want to err on the side of failure for tests. (If you want to do monkeypatching in production, you obviously want to be confident in your tests and have good error catching.) As far as tracing is concerned, right now I am doing very basic "print" statements, but once you have these hooks in place, you can do more exotic things like warn when the same object is being dereferenced too many times, or even build up a graph of object interrelationships. (I leave that as an exercise to the reader.) If you want to see what the core _resolve_lookup method looks like, you can find it in django/templates/__init__.py in your installation, or also here (scroll down to line 701 or so): [source](http://code.djangoproject.com/browser/django/trunk/django/template/__init__.py)

  • template
  • variable
  • resolve
Read More

CSV Exporting of Model Data

This is a basic model view for exporting data from models. It is designed so that you can provide the GET variables used for searching/filtering within listdisplay pages in the admin, and the code will filter the same way. It allows the output of model data in various formats using serializers or templates.

  • models
  • export
  • csv
  • data
  • reports
Read More

Fix for GZipMiddleware when serving files or streaming or using iterators

A simple replacement for Django's default GZipMiddleware which breaks when trying to serve files or pass any kind of iterators to the HttpResponse object. Simply replace GZipMiddleware with the provided middleware and set response.dontgzip = True when returning the response, and it will then be ignored by the middleware.

  • files
  • gzip
  • streaming
  • gzipmiddleware
Read More