大约有 38,000 项符合查询结果（耗时：0.0919秒） [XML]
Can I make the foreign key field optional in Django model
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197
Sure, just add blank=True, null=True for each field that you want to remain optional like
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Android emulator shows nothing except black screen and adb devices shows “device offline”
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edited Jul 25 '18 at 9:54
answered Nov 16 '12 at 15:37
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How to select only the records with the highest date in LINQ
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edited Mar 6 '14 at 19:33
Ravi Ram
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Error in : object of type 'closure' is not subsettable
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Joshua UlrichJoshua Ulrich
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How to configure an existing git repo to be shared by a UNIX group
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Trevor Boyd Smith
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answered Jul 13 '10 at 23:34
David UnderhillDavid Underhill
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How do I determine which iOS SDK I have?
...OS X SDKs:
OS X 10.8 -sdk macosx10.8
OS X 10.9 -sdk macosx10.9
iOS SDKs:
iOS 6.1 -sdk iphoneos6.1
iOS 7.0 -sdk iphoneos7.0
iOS Simulator SDKs:
Simulator - iOS 6.0 -sdk iphone...
Using R to list all files with a specified extension
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MarekMarek
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Path.Combine absolute with relative path strings
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edited Jun 29 '15 at 17:13
Cyral
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ggplot: How to increase spacing between faceted plots?
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– David J. Harris
Nov 8 '16 at 16:49
14
Update - is now theme(panel.spacing = unit(1, "lines"))
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Is it possible to decompile a compiled .pyc file into a .py file?
...rite it from scratch.
– avmohan
Jan 9 '14 at 9:39
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For those of you here because you accidental...