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django : using select_related and get_object_or_404 together
Is there any way of using get_object_or_404 and select_related together or any other way to achieve the result of using these two together(except from putting it in try/except)??
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Query for documents where array size is greater than 1
...r: [{name: {$exists: false}}, {name: {$size: 0}}, {name: {$size: 1}}]})
{ "_id" : ObjectId("511907e3fb13145a3d2e225b"), "name" : [ "George", "Raymond" ] }
{ "_id" : ObjectId("511907e3fb13145a3d2e225c"), "name" : [ "George", "Raymond", "Richard" ] }
{ "_id" : ObjectId("511907e3fb13145a3d2e225d"), "na...
Sending event when AngularJS finished loading
... run when your element is ready/loaded. Based on Josh's description of the order in which compile and link functions are executed,
if you have this markup:
<div directive1>
<div directive2>
<!-- ... -->
</div>
</div>
Then AngularJS will create the dir...
How does free know how much to free?
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FYI, for example BSD has malloc_size() to reliably access the block size from an malloc()ed pointer. But there's no reliable, portable way.
– laalto
Oct 5 '09 at 7:53
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How to fix: “UnicodeDecodeError: 'ascii' codec can't decode byte”
... declared in your code using the u prefix to strings. E.g.
>>> my_u = u'my ünicôdé strįng'
>>> type(my_u)
<type 'unicode'>
Unicode strings may also come from file, databases and network modules. When this happens, you don't need to worry about the encoding.
Gotchas
C...
How to change the output color of echo in Linux
...put accepts scripts containing one command per line, which are executed in order before tput exits.
Avoid temporary files by echoing a multiline string and piping it:
echo -e "setf 7\nsetb 1" | tput -S # set fg white and bg red
See also
See man 1 tput
See man 5 terminfo for the complete lis...
Django MEDIA_URL and MEDIA_ROOT
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# ... the rest of your URLconf goes here ...
) + static(settings.MEDIA_URL, document_root=settings.MEDIA_ROOT)
You no longer need if settings.DEBUG as Django will handle ensuring this is only used in Debug mode.
ORIGINAL answer for Django <= 1.6
Try putting this into your urls.py
from...
Local variables in nested functions
...s to the function, with the code using an index to reference each cell. pet_function thus has one free variable (cage) which is then referenced via a closure cell, index 0. The closure itself points to the local variable cage in the get_petters function.
When you actually call the function, that cl...
When should Flask.g be used?
...st without change to code.
The application context is popped after teardown_request is called. (Armin's presentation explains this is because things like creating DB connections are tasks which setup the environment for the request, and should not be handled inside before_request and after_request)
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Spring @PostConstruct vs. init-method attribute
... If a bean is using more than one of those methods and relying on the order of initialization, it's going to be horribly complex and unmaintainable.
– Donal Fellows
Dec 15 '11 at 11:25
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