大约有 40,000 项符合查询结果（耗时：0.0506秒） [XML]
select and update database record with a single queryset
...el.objects.get(pk=some_value)
q.field1 = 'some value'
q.save()
3rd method
By using get_object_or_404
q = get_object_or_404(MyModel,pk=some_value)
q.field1 = 'some value'
q.save()
4th Method
if you required if pk=some_value exist then update it other wise create new one by using update_or_create.
M...
The imported project “C:\Microsoft.CSharp.targets” was not found
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@Iomaxx, I fixed this problem by changing the Monodevelop Build Target to Mono/.NET 4.0 from Mono/.NET 3.5.
– Frank
Apr 9 '16 at 9:13
5...
What is a predicate in c#? [duplicate]
...> (or Linq, or any of that fancy stuff), I could always accomplish this by doing the following:
Person oscar = null;
foreach (Person person in people) {
if (person.Name == "Oscar") {
oscar = person;
break;
}
}
if (oscar != null) {
// Oscar exists!
}
This is fine, b...
Integer division: How do you produce a double?
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@FabricioPH, multiplying by 1.0 still changes the type of the result, just in a different way. 'Seems dirty code to me' does not explain in what scenario(s) you believe multiplying by 1.0 is actually better (or why that might be).
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data type not understood
... imageUploader: {
brandingHtml: "Powered by \u003ca href=\"https://imgur.com/\"\u003e\u003csvg class=\"svg-icon\" width=\"50\" height=\"18\" viewBox=\"0 0 50 18\" fill=\"none\" xmlns=\"http://www.w3.org/2000/svg\"\u003e\u003cpath d=\"M46.1709 9.17788C46.1709 8.26454...
C++ map access discards qualifiers (const)
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By the way of explanation: what should map's operator[] do if the key does not exist? If the map is non-const, the key is added with default-constructed value. If the map const, what can be returned by operator[]? There is no...
RESTful Login Failure: Return 401 or Custom Response
...nk is based on the fact that doing boolean requests in REST often is wrong by the RESTful constraints. Every request should return a resource. Doing boolean questions in an RESTful service is a slippery sloop down to RPC.
Now I dont know how the services that you looked on is behaving. But a good w...
Is there a way to use shell_exec without waiting for the command to complete?
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I usually get PID of running script by adding echo $! >> /tmp/pid.txt at the end of exec command but by redirecting output & error to /dev/null, no more pid file : does any of you can get PID of script launched by exec while not waiting for output ?
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How to squash commits in git after they have been pushed?
... gstackoverflow: + forces only the refspec which is prefixed by it. --force will force all the refspecs being pushed. Please see the updated answer.
– Alan Haggai Alavi
Dec 9 '14 at 23:47
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Wait for page load in Selenium
...work because there will be some asynchronous calls that cannot be detected by the document.readyState.
– Homewrecker
Aug 28 '15 at 7:46
3
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