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django admin - add custom form fields that are not part of the model
...rms.py you can add a ModelForm class and then declare your extra fields inside that as you normally would. I've also given an example of how you might use these values in form.save():
from django import forms
from yourapp.models import YourModel
class YourModelForm(forms.ModelForm):
extra_fi...
How to pass arguments and redirect stdin from a file to program run in gdb?
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@codehippo: Well, if you didn't specify --args then there aren't any arguments passed to the executable, so it's hardly ambiguous.
– Lightness Races in Orbit
Jul 23 '14 at 14:02
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$on and $broadcast in angular
... = args.any;
// do what you want to do
});
Documentation for this inside the Scope docs.
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Abort makefile if variable not set
...ndef conditional, so that a variable defined to an empty value is also considered "undefined". But this is only true for simple variables and explicitly empty recursive variables:
# ifndef and check_defined consider these UNDEFINED:
explicitly_empty =
simple_empty := $(explicitly_empty)
# ifndef a...
How to show all privileges from a user in oracle?
...ILE package or else you get an error when running Pete Finnigan's script: "identifier 'UTL_FILE' must be declared". You can connect as sys with roll sysdba through SQL Developer and then it will work or grant yourself execute privileges to this package using: grant execute on UTL_FILE to <user>...
Multiple aggregations of the same column using pandas GroupBy.agg()
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It has already been said, but using dictionaries for renaming output columns from age is deprecated. You can instead specify a list of tuples. See this answer.
– cs95
Jan 22 '19 at 1:53
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Does setting Java objects to null do anything anymore?
...at hangs on to objects after a job has finished, well... that's a bug in said thread pool library that could perhaps be worked around by nulling an object reference, but equally might be worked around by using a less buggy thread pool library. I'm not sure that such a bug changes general design prin...
Can you help me understand Moq Callback?
...Returns respectively), plain and simple.
– Ohad Schneider
Aug 10 '17 at 9:58
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Why do I need Transaction in Hibernate for read-only operations?
...ght be problematic. For instance Hibernate community says that working outside of transaction might cause unpredictable behavior. This is because Hibernate will open transaction, but it won't close it on its own, thus connection will be returned to the Connection Pool with transaction being not comm...
Memory management in Qt?
...aints imposed by the constructors for other reasons, however; such as in QWidget(QWidget* parent=0), where the parent must be another QWidget, due to e.g. visibility flags and because you’d do some basic layout that way; but for Qt's hierarchy system in general, you are allowed to have any QObject...