大约有 31,000 项符合查询结果（耗时：0.0381秒） [XML]
Filtering for empty or NULL names in a queryset
...ield = TRUE AND other_field = TRUE)
Alternatively, if your logic is more complex than that, you could use Django's Q objects:
from django.db.models import Q
Name.objects.exclude(Q(alias__isnull=True) | Q(alias__exact=''))
For more info see this page and this page in the Django docs.
As an asid...
Get “Internal error in the expression evaluator” on “Add watch” function when trying to debug WCF se
...d) debug engine that ships with Visual Studio 2013. Try turning on Managed Compatibility Mode (which effectively turns it into pre-2013 debug engine), located under Tools - Options - Debugging:
If this solves the issue, then I'd suggest trying to reproduce it with a small project, and then report...
What's the fastest way to delete a large folder in Windows?
...
Use Windows Command Prompt:
rmdir /s /q folder
share
|
improve this answer
|
follow
|
...
What is the best way to find the users home directory in Java?
... Linux, other unix variants. I am looking for a snippet of code that can accomplish this for all platforms, and a way to detect the platform.
...
Entity Framework - Start Over - Undo/Rollback All Migrations
...r. I'm at the point where I just want to start over, so is there a way to completely undo all migrations, erase the history, and delete the migration code, so I'm back to square one?
...
...ons and is automatically HTMLEncoded.
<%-- --%> - is for server-side comments
share
|
improve this answer
|
follow
|
...
HTML table with fixed headers?
...ng'), 160); // 160 is height
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.6.4/jquery.min.js"></script>
<div style="width:300px;border:6px green solid;">
<table border="1" width="100%" id="tblNeedsScrolling">
<thead>
<tr><t...
For loop example in MySQL
...oor(0 + (rand() * 65535)) );
set v_counter=v_counter+1;
end while;
commit;
end #
delimiter ;
call load_foo_test_data();
select * from foo order by id;
share
|
improve this answer
...
Unzip files programmatically in .net
...
I don't know about your company, but my experience has always been that it's possible to get an exception to that sort of rule if you write up a business case description of why you want the exception. Point out the cost savings v. DIY, as well as t...
What reason is there to use null instead of undefined in JavaScript?
...ect was expected (or that there was an error). My problem with that is its completely arbitrary, and totally unnecessary.
That said, there is one major difference - variables that aren't initialized (including function parameters where no argument was passed, among other things) are always undefin...