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Check if OneToOneField is None in Django
... doesn't work all the time. In case you want to work with select_related() now or in the future -- or maybe even to be sure you also handle other sorts of magic which may happen elsewhere -- you have to extend the test as follows: if hasattr(object, 'onetoonerevrelattr') and object.onetoonerevrelatt...
How to revert Master branch to upstream
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(I'm assuming that the changes that you now want to ignore are at your origin remote, you're on your master branch, and you want to revert to the contents of the upstream remote)
Firstly, reset your working copy to the upstream master:
git remote update
# the dou...
Function return value in PowerShell
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With PowerShell 5 we now have the ability to create classes. Change your function into a class, and return will only return the object immediately preceding it. Here is a real simple example.
class test_class {
[int]return_what() {
W...
Versioning SQL Server database
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This is one of the "hard problems" surrounding development. As far as I know there are no perfect solutions.
If you only need to store the database structure and not the data you can export the database as SQL queries. (in Enterprise Manager: Right click on database -> Generate SQL script. I ...
How to catch integer(0)?
...empty, cuz some functions return integer(0) instead of NA or NULL. But for now your way is the most straightforward, and works vector-wise which is a big advantage over length(a).
– Ufos
Feb 26 '18 at 9:54
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Xcode: failed to get the task for process
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Ok, now I feel dumb ... I mistakenly was choosing Deployment -> iPad and was getting this error. Couldn't figure out why for the life of me, until I realized it, switched it to Development -> iPad and it worked. Duh! :P
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setTimeout or setInterval?
...r for many years was IE Mobile in WinMo <6.5, but hopefully that too is now behind us.
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Most common C# bitwise operations on enums
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In .NET 4 you can now write:
flags.HasFlag(FlagsEnum.Bit4)
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TransactionManagementError “You can't execute queries until the end of the 'atomic' block” while usi
...or database interaction, unittest.TestCase for other simple test, it works now!
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Where does this come from: -*- coding: utf-8 -*-
...e Python Language Reference, 2.1.4 Encoding declarations), though I don't know if it was the first program to use that syntax.
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