Django snippets: SnippySnip

SnippySnip

from django.db import models

class Snippet(models.Model):

    title = models.CharField(maxlength=64, unique=True)
    content = models.TextField(blank=True)
    description = models.TextField(blank=True)

    # For Django 0.96 and previous
    def __str__(self):
        return self.__unicode__()

    # For Django > 0.96
    def __unicode__(self):
        return self.title

    class Admin:
        pass

    class Meta:
        ordering = ['title']
        

def snip(name):
	
	try:
		return Snippet.objects.get(title=name).content
	except:
		return ""

More like this

RadioSelectWithHelpText by moxypark 1 year, 5 months ago
GeoDjango maps in admin TabularInlines by alanB 1 year, 4 months ago
Return to change_list with filter after change by graveyboat 5 months, 4 weeks ago
Additional Change List Columns by sansmojo 4 years, 6 months ago
Dynamic Models Revisited by Ben 4 years, 4 months ago

Help me get better! If you vote (either way) please leave a comment if you have time and say what was good or bad. I appreciate any and all feedback. Thanks!

I keep finding places in my apps where I need an isolated snippet of text that can periodically be changed from the admin interface. Most often it's html but sometimes it's text, javascript, or css.

Use it like so: (Assuming this snippet lives in snippy_snip/models.py and there is a snippet named "Welcome Message" in the database)

from snippy_snip.models import snip

msg = snip("Welcome Message")

Or, you might populate a parameter hash for a template:

def showpage(request):
    params = {
    'welcome': snip('Welcome Message'),
    'video1': snip('Video 1'),
    'NavHeader': snip('Nav.SectionHeader'),
    }

    return render_to_response("main.html", params)

For clarity, params might look something like this:

welcome -> "Welcome to our site. Please use the menu on the left..."

video1 - > a YouTube snippet

NavHeader -> Some HTML which comprises the top of a navigation menu.

This is a very simple bit of code but I've found it very useful. It isn't intended for instant changes... Your snippets will cache like anything else, which may cause confusion if you expect immediate changes. And it's probably not great for a high traffic site, but for my moderate traffic sites and workgroup apps I've found it useful.

(This code was created for 0.96, but I'm working to bring it into alignment with the latest svn version of Django, see comments.)

Author:: youell
Posted:: July 17, 2008
Language:: Python
Django Version:: .96
Tags:: text snippet html javascript
Score:: -2 (after 4 ratings)

Tools

Comments

KpoH (on July 18, 2008):

first of all, str method in model long ago was replaced by unicode.

This try: except: is horrible. It should looks like

try:
    return Snippet.objects.get(title=name).content
except Snippet.DoesNotExist:
    return ""

Any way. this ^^ is not so smart approach.

KpoH (on July 18, 2008):

err

__str__ and __unicode__

youell (on July 18, 2008):

@KpoH, thanks for the feedback!

I'm on 0.96, which didn't call __unicode__ by default. But I've created a workaround which I think should be forward compatible. Tell me what you think:

def __str__(self):
    return self.__unicode__()

def __unicode__(self):
    return self.title

Works fine on 0.96, but I don't have a trunk version to test against at the moment, so I only assume it would work with the latest svn.

As for the exception handling, yeah it's crude, but I'm happy with it in this particular situation.

buriy (on July 19, 2008):

and please also add unique=True to titles ;)

youell (on July 19, 2008):

@burly - Done. Thank you!

aarond10ster (on July 22, 2008):

This seems kinda like (almost exactly like) gettext in the i18n module. You might also end up with your Snippets confusing you at some point in the future when you start using snip("Submit") and decide that half of your buttons should read "Send" and half "Save" (as happened to me when translating to Japanese).

I like the idea but I'm not convinced its maintainable or even sticking to the DRY principle.

Is there a reason this can't be achieved with gettext/i18n and something like the rosetta interface?

youell (on July 23, 2008):

Hi @aarond10ster! I'm not entirely sure I understood what you're going for, but I took a shot. Let me know how bad I've misunderstood you. :)

Mechanically, I think yes you could use Rosetta. It would be a bit like using a screwdriver as a hammer though. From what I've gathered you'd have to restart the webserver every time a user changed text and the .MOs were recompiled, but technically I think it would work. Of course if you tried to use Rosetta for actual localization at the same time that would probably get awkward fast.

To put it all in perspective, I use this code on small sites where the clients/users want to change information on a page frequently and they have a limited number of spots to change.

Let me know how I did with understanding you. Thanks!

youell (on July 23, 2008):

Oh, and I should add some more clarification. SnippySnip is intended to work more like server-side includes or a hash table than anything (like localization) at this point.

Django snippets

SnippySnip

More like this

Tools

Comments

Snippets

About