Django snippets

Comments

jdobbins (on March 11, 2007):

Thanks for the great snip! Wonderful tool for debugging 'slow pages'!

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msgre (on March 14, 2007):

Cool!

I have little troubles with displaying long rows of queries. For example:

SELECT col1,col2,col3,col4 FROM table;

If you have a LOT of colX, they aren't wrapped in browser, and queries are bad to read.

So, I make little modification. I wrote custom filter, which replace character "," (comma) to ", " (comma and space). Now I could read debug SQL queries more comfortably.

My custom filter

def spaces_and_commas(value):
    from re import compile
    c = compile(",[^ ]")
    return c.sub(", ", value)

register.filter(spaces_and_commas)

Modification of your template (row 24)

<td>{{ query.sql|spaces_and_commas|escape }}</td>

Thank you for great snippet, insin.

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cookiebearo (on May 28, 2007):

thank you both insin for the snippet and msgre for the filter, however, i noticed a bug with the filter

the expression:

c = compile(",[^ ]")

matches the first character after the comma (non-space), so after the sub call it is replacing that character with a space

i only caught this after realizing there was a missing " before each column

i swapped that out for:

c = compile(",(?! )")

and it seems to be working a-ok

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PhiR (on September 12, 2007):

I'm using this snippets with the modifications in the comments but I've found useful to add this templatetags:

def slice_500(value):
    return value[:500]
register.filter(slice_500)

and to restrict the number of queries printed like this:

{% for query in sql_queries|splice_500 %}<tr class="{% cycle odd,even %}">

Some of my views are used for validation and run up to a few hundred thousand queries, which is a bit too much to print in a browser.

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darek (on July 13, 2008):

Very helpful snippen. Tanks.

By the way... in current Django SVN version You don't have to set TEMPLATE_CONTEXT_PROCESSORS, it's on by default.

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aaronfay (on September 24, 2008):

Brilliant works like a charm :)

af

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ramikassab (on February 11, 2009):

Awesome snippet. Simple, clean, and effective...

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analyzer (on March 7, 2010):

Hello,

I am new to django and i justed started to play around with django. I've copied this snippet to my base template but I can't see anything?

I checked every of the three steps mentioned above, the context processors are set by default and my ip is on INTERNAL_IPS. I don't understand what the third point means but I've added a request context to shortcut for rendering templates.

What can I do to get it work? Thanks for your help in advance and sorry for my bad english.

analyzer

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Klaidi (on July 22, 2010):

nice !

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I often find something like this lurking at the end of my base templates iPad 2 Cases

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Latisse-UK (on October 3, 2012):

Very useful

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KStevens (on December 19, 2012):

Thanks for the snippet. It'll come in handy! Kevin's website.

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lukasparov (on February 13, 2013):

Very awesome snippets, clean and simple. Thanks. All Home Theater

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m (on March 7, 2013):

I still can't get it to work. I'm using Django 1.3.1. Can someone post their settings? I had to add a number of options to TEMPLATE_CONTEXT_PROCESSORS to get my site to render correctly. ("django.contrib.auth.context_processors.auth", "django.core.context_processors.debug", "django.core.context_processors.i18n", "django.core.context_processors.media", "django.core.context_processors.static", "django.contrib.messages.context_processors.messages")

I'm not clear where the template code goes. I copied it into my admin_base.html.

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zxl777 (on March 26, 2013):

Ok,Just Test

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Exactly what I want! Thanks for the great snip! Wonderful tool for debugging 'slow pages'!

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