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Django self-referential foreign key

I'm kind of new to webapps and database stuff in general so this might be a dumb question. I want to make a model ("CategoryModel") with a field that points to the primary id of another instance of the model (its parent). ...
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How do I automatically sort a has_many relationship in Rails?

This seems like a really simple question but I haven't seen it answered anywhere. 5 Answers ...
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How to create abstract properties in python abstract classes

In the following code, I create a base abstract class Base . I want all the classes that inherit from Base to provide the name property, so I made this property an @abstractmethod . ...
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What does the tilde (~) mean in my composer.json file?

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How to style a JSON block in Github Wiki?

Is there a way to nicely format/style JSON code in Github Wiki (i.e Markdown preferred)? 4 Answers ...
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Can anybody push to my project on github?

I am new to git as well as github. I set up a repo on github, and I can push local stuff to this remote repo. Now here is the question: just after I push something to the remote repo, and I refresh the page, I can see the changes are uploaded(for example, if I wrote a readme.txt and push it to the r...
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MySQL ON DUPLICATE KEY UPDATE for multiple rows insert in single query

... a SQL query where I want to insert multiple rows in single query. so I used something like: 3 Answers ...
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Mocking objects with Moq when constructor has parameters

...n object I'm trying to mock using moq. The object's constructor has required parameters: 2 Answers ...
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Get all git commits since last tag

When I'm going to tag a commit, I need to know what changed since the last tagged commit. Eg: 2 Answers ...
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Using SignalR with Redis messagebus failover using BookSleeve's ConnectionUtils.Connect()

I am trying to create a Redis message bus failover scenario with a SignalR app. 1 Answer ...