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How do I rename a column in a database table using SQL?
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edited Oct 3 '14 at 11:05
Rob Grant
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Should a retrieval method return 'null' or throw an exception when it can't produce the return value
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Only throw an exception if it is truly an error. If it is expected behavior for the object to not exist, return the null.
Otherwise it is a matter of preference.
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Property getters and setters
...rning:
Attempting to access 'name' from within it's own getter.
The error looks vague like this:
As an alternative you might want to use didSet. With didSet you'll get a hold to the value that is was set before and just got set to. For more see this answer.
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How do I set the size of an HTML text box?
How do I set the size of an HTML text box?
11 Answers
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What is `related_name` used for in Django?
...uire.
– Csaba Toth
Nov 22 '16 at 22:05
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related_name should be plural. Because ForeignKey relat...
How to pass command line arguments to a shell alias? [duplicate]
...set -x; alias serve="python -m SimpleHTTPServer $1 &" you will see the error/problem. Both your argument and the alias command are run as separate commands.
– PatS
Feb 13 '18 at 17:33
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Save bitmap to location
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– Stephan Henningsen
Feb 19 '19 at 9:05
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How to stop event bubbling on checkbox click
I have a checkbox that I want to perform some Ajax action on the click event, however the checkbox is also inside a container with it's own click behaviour that I don't want to run when the checkbox is clicked. This sample illustrates what I want to do:
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PDOException “could not find driver”
...in your code reveals you are trying to connect with the mysql driver. Your error message indicates that this driver is unavailable.
Check that you have the mysql extension installed on your server.
In Ubuntu/Debian you check for the package with:
dpkg --get-selections | grep php | grep mysql
In...
Export specific rows from a PostgreSQL table as INSERT SQL script
...user_name". I also almost succeed with ToraSQL tool, it's just that it has error in date-time data in the script result. If none can give GUI tool solution in 2 days, your answer will be accepted
– null
Oct 10 '12 at 9:54
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