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How do I automatically update a timestamp in PostgreSQL
...),
timestamp timestamp default current_timestamp
)
Note that the value for that column can explicitly be overwritten by supplying a value in the INSERT statement. If you want to prevent that you do need a trigger.
You also need a trigger if you need to update that column whenever the row is up...
Please explain about insertable=false and updatable=false in reference to the JPA @Column annotation
...lso u are saying that @Column definition does something different when its foreign key (Person) and when it is not foreign key (as there is no referenced entity to disable updating). By reading javadoc for updatable I would say that it will just disable to change Person for given Address if it is on...
How to Define Callbacks in Android?
...there was a presentation about implementing restful client applications. Unfortunately, it was only a high level discussion with no source code of the implementation.
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Convert object to JSON in Android
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Why we have no embedded method for toJson? But we have for fromJson ?
– M at
Nov 22 '17 at 10:31
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What is the use of “assert” in Python?
...nning the assert with a (condition, message) tuple as first parameter.
As for disabling them, when running python in optimized mode, where __debug__ is False, assert statements will be ignored. Just pass the -O flag:
python -O script.py
See here for the relevant documentation.
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How can I use Google's Roboto font on a website?
...'t really need to do any of this.
Go to Google's Web Fonts page
search for Roboto in the search box at the top right
Select the variants of the font you want to use
click 'Select This Font' at the top and choose the weights and character sets you need.
The page will give you a <link> ele...
how to set desired language in git-gui?
I recently came to git for a project I participate to. I found git gui rather handy (under OSX Snow Leopard) to srtat with but I would much like if it were not localized (in French, in my case). Is there preference or hack to have git gui displayed in english?
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jQuery append() vs appendChild()
...vascript also has a ParentNode.append() now. please check @SagarV's answer for more info.
– Jo E.
Dec 26 '17 at 4:20
I...
jQuery ui dialog change title after load-callback
I like to change the title from an UI Dialog after i have submitted a form in this UI Dialog. So in the callback-function after load i should suggest, but i've tried and googled without result.
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What to do on TransactionTooLargeException
...between your services and application?
Using intents to share huge data, (for example, the user selects huge number of files from gallery share press share, the URIs of the selected files will be transferred using intents)
receiving bitmap files from service
waiting for android to respond back with...