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How do I migrate a model out of one django app and into a new one?
I have a django app with four models in it. I realize now that one of these models should be in a separate app. I do have south installed for migrations, but I don't think this is something it can handle automatically. How can I migrate one of the models out of the old app into a new one?
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asynchronous vs non-blocking
...ndustry.
For example in the classic sockets API, a non-blocking socket is one that simply returns immediately with a special "would block" error message, whereas a blocking socket would have blocked. You have to use a separate function such as select or poll to find out when is a good time to retry...
Linq code to select one item
I find myself writing a lot of code like this to select one item that matches
7 Answers
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How to keep one variable constant with other one changing with row in excel
Lets say I have one cell A1, which I want to keep constant in a calculation. For example, I want to calculate a value like this:
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What is the difference between Amazon SNS and Amazon SQS?
...QS. Messages can't be received by multiple receivers at the same time. Any one receiver can receive a message, process and delete it. Other receivers do not receive the same message later. Polling inherently introduces some latency in message delivery in SQS unlike SNS where messages are immediately...
Cannot push to Heroku because key fingerprint
... simple app to Heroku. This is the second app that I deploy, and the first one I was able to do it just fine. However I am having some issues with this one. Whenever I " git push heroku master ", I get this error:
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One SVN repository or many?
...sitories are may require multiple files. Maintenance has similar issues - one big backup, or a lot of little backups.
I manage my own. There's one repository, multiple projects, each with its own tags, trunk and branches. If one gets too big or I need to physically isolate a customer's code for ...
Synchronizing a local Git repository with a remote one
I want to synchronize my local repository with a remote one so that my local repository becomes a 100% copy of the remote one - meaning that if certain files differ in these repositories, we override the local ones with the remote ones, and if there are files in local repositories that do not exist ...
Why use the params keyword?
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One danger with params Keyword is, if after Calls to the Method have been coded,
someone accidentally / intentionally removes one/more required Parameters from the Method Signature,
and
one/more required Parameters immed...
Select where count of one field is greater than one
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One way
SELECT t1.*
FROM db.table t1
WHERE exists
(SELECT *
FROM db.table t2
where t1.pk != t2.pk
and t1.someField = t2.someField)
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