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Id
1107485
data
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0
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CreationDate
2009-07-10T03:06:55.297
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2009-07-10T03:23:15.690
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2009-07-10T03:23:15.690
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136008
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136008
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1106188
PostTypeId
2
Score
2
ViewCount
0
LastEditorDisplayName
text
Body
<ol> <li>RAM is volatile, thus not persistent: memcached is not what you asked for.</li> <li><a href="http://harmful.cat-v.org/software/xml/" rel="nofollow noreferrer" title="Why XML sucks anyway">XML</a> it is not the right technology to store a single value.</li> <li>RDMS is not the right technology to store a single value.</li> <li>Django cache framework will answer your question if CACHE_BACKEND is set to anything else than file://...</li> </ol> The filesystem is the right technology to "persist a single value". In settings.py: <pre><code> RSS_FETCH_DATETIME_PATH=os.path.join( os.path.abspath(os.path.dirname(__file__)), 'rss_fetch_datetime' ) </code></pre> In your rss fetch script: <pre><code> from django.conf import settings handler = open(RSS_FETCH_DATETIME_PATH, 'w+') handler.write(int(time.time())) handler.close() </code></pre> Wherever you need to read it: <pre><code> from django.conf import settings handler = open(RSS_FETCH_DATETIME_PATH, 'r+') timestamp = int(handler.read()) handler.close() </code></pre> But cron is the right tool if you want to "run a command every day", for example at 5AM: <pre><code> 0 5 * * * /path/to/manage.py runscript /path/to/retreive/script </code></pre> Of course, you can still write the last update timestamp in a file at the end of the retreive script, and use it somewhere else, if that makes sense to you. Concluding by quoting Ken Thompson: <blockquote> One of my most productive days was throwing away 1000 lines of code. </blockquote>
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1. POHow can I persist a single value in Django?
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