Building data-driven web apps with Flask and SQLAlchemy Transcripts
Chapter: Using SQLAchemy
Lecture: Concept: Ordering data
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Databases are really good at filtering and ordering.
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Here is a function, find_all_packages
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and the idea is I would like, ideally
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a list of all the packages in the database
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showing the newest ones first and the oldest ones last.
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So we're going to do a query on package
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and we don't do any filtering
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because like we said the in name, we want them all.
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But we are going do an order_by
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so we say, query of package.order_by
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and then we always express these
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operations in terms of the type, so package.created
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If we just said package.created
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it would order ascending by the created_date
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but we want descending, so we go into that descriptor
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created and we say .desc we call the function
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to reverse the sort, and then we just say
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give us all the packages, here they come.
