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What's the difference between identifying and non-identifying relationships?
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An identifying relationship is when the existence of a row in a child table depends on a row in a parent table. This may be confusing because it's common practice these days to create a pseudokey for a child table, but not make...
When saving, how can you check if a field has changed?
...t(pk=instance.pk)
except sender.DoesNotExist:
pass # Object is new, so field hasn't technically changed, but you may want to do something else here.
else:
if not obj.some_field == instance.some_field: # Field has changed
# do something
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Adding parameter to ng-click function inside ng-repeat doesn't seem to work
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Instead of
<button ng-click="removeTask({{task.id}})">remove</button>
do this:
<button ng-click="removeTask(task.id)">remove</button>
Please see this fiddle:
http://jsfiddle.net/JSWorld/Hp4W7/34/
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Equivalent of strace -feopen < command > on mac os X
...unction () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f1925978%2fequivalent-of-strace-feopen-command-on-mac-os-x%23new-answer', 'question_page');
}
);
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“Invalid JSON primitive” in Ajax processing
...ore likely to get more upvotes — and help the questioner learn something new.
– lmo
Sep 7 '16 at 22:19
I want to pas...
Django Admin - change header 'Django administration' text
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@DavidArcos You need to register your models at new admin_site that you created. Like admin_site.register(MyModel, ModelAdmin)
– Andrey Fedoseev
Aug 1 '14 at 13:06
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TimeSpan ToString format
...e like this:
// 12 days, 23 hours, 24 minutes, 2 seconds.
TimeSpan span = new TimeSpan(12, 23, 24, 2);
// 27 hours, 24 minutes, 2 seconds
TimeSpan span2 = new TimeSpan(27,24,2);
string format = span.ToString("h'h 'm'm 's's'");
string format2 = span2.ToString("h'h 'm'm 's's'");
Console.WriteLine(fo...
How to get Top 5 records in SqLite?
... answered Apr 28 '10 at 11:38
newtovernewtover
27.2k1111 gold badges7474 silver badges8484 bronze badges
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Tips for debugging .htaccess rewrite rules
...ging for users on shared hosting
1. Use a Fake-user agent
When testing a new rule, add a condition to only execute it with a fake user-agent that you will use for your requests. This way it will not affect anyone else on your site.
e.g
#protect with a fake user agent
RewriteCond %{HTTP_USER_AG...
Logging levels - Logback - rule-of-thumb to assign log levels
...h to read.
Debug means that something normal and insignificant happened; a new user came to the site, a page was rendered, an order was taken, a price was updated. This is the stuff excluded from info because there would be too much of it.
Trace is something i have never actually used.
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