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Django ManyToMany filter()
...many examples of FOO__in=... style filters in the many-to-many and many-to-one tests. Here is syntax for your specific problem:
users_in_1zone = User.objects.filter(zones__id=<id1>)
# same thing but using in
users_in_1zone = User.objects.filter(zones__in=[<id1>])
# filtering on a few...
Best explanation for languages without null
...so often when programmers are complaining about null errors/exceptions someone asks what we do without null.
11 Answers
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Test a weekly cron job [closed]
...un the following as root:
run-parts -v /etc/cron.weekly
... or the next one if you receive the "Not a directory: -v" error:
run-parts /etc/cron.weekly -v
Option -v prints the script names before they are run.
share
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Binding an enum to a WinForms combo box, and then setting it
...at the value must be a valid enum value and if it isnt then something has gone very wrong and you probably want an exception.
– bytedev
Oct 6 '16 at 9:31
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How to get current route in Symfony 2?
...As such, Symfony doesn't know what route that is for. Typically, you have one route to one controller, so it may seem weird that this can't report anything besides "_internal", however, it is possible to create general-purpose controllers that get associated with more than one route definition. Wh...
How to explain callbacks in plain english? How are they different from calling one function from ano
...to explain callbacks in plain English? How are they different from calling one function from another function taking some context from the calling function? How can their power be explained to a novice programmer?
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@class vs. #import
It is to my understanding that one should use a forward-class declaration in the event ClassA needs to include a ClassB header, and ClassB needs to include a ClassA header to avoid any circular inclusions. I also understand that an #import is a simple ifndef so that an include only happens once....
Running junit tests in parallel in a Maven build?
...y own ParallelSuite and ParallelParameterized runners. Using these runners one can easily parallelize test suites and parameterized tests.
ParallelSuite.java
public class ParallelSuite extends Suite {
public ParallelSuite(Class<?> klass, RunnerBuilder builder) throws InitializationError...
How do I perform an IF…THEN in an SQL SELECT?
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The case statement is your friend in this situation, and takes one of two forms:
The simple case:
SELECT CASE <variable> WHEN <value> THEN <returnvalue>
WHEN <othervalue> THEN <returnthis>
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Convert form data to JavaScript object with jQuery
...a few months old, but since when did do arrays use non-numeric indexes? No one should name an input foo[bar] and hope to treat it as an array. Are you confusing arrays and hashes? Yes, [] is commonly understood to be an accessor but not just for arrays. Also saying it's valid HTML but not in the HTM...