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Can I make the foreign key field optional in Django model
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Sure, just add blank=True, null=True for each field that you want to remain optional like
subject = models.ForeignKey(subjects, blank=True, null=True)
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setup cron tab to specific time of during weekdays
I am trying to setup a cron job on a Ubuntu server. We want the cron job to run the script at certain times of the day and on some specific days of the week. For example, we want to setup a cron job that runs the script with the following sequence:
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ggplot: How to increase spacing between faceted plots?
... histograms (obtained with the command below) which are nicely plotted one under the other. I would like to increase the spacing between them, however, they are tight.
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How to abort an interactive rebase if --abort doesn't work?
I've got myself into a muddle via an interactive rebase, and I now wish to abort it. (i.e. go back to the point before I was dropped into interactive rebase mode, in my case via git pull --rebase .) The way to do this seems to be via git rebase --abort , but this doesn't work:
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mysql query order by multiple items
is is possible to order by multiple rows?
3 Answers
3
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TypeError: Cannot read property 'then' of undefined
Above function return a string like "failed".
However, when I try to run then function on it, it will return error of
2 Ans...
MySql - Way to update portion of a string?
I'm looking for a way to update just a portion of a string via MySQL query.
4 Answers
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How to calculate a mod b in Python?
Is there a modulo function in the Python math library?
7 Answers
7
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How to change the Eclipse default workspace?
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It doesnt allow me to move this folder anywhere outside of my working folder...Is there any workarounds to move this folder into another drive?
– Laserson
Mar 17 '13 at 14:43
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int to hex string
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Use ToString("X4").
The 4 means that the string will be 4 digits long.
Reference: The Hexadecimal ("X") Format Specifier on MSDN.
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