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Chapter: Course conclusion and review
Lecture: Review: Inserting data with SQLAlchemy
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Once our databases all set up, we would love to save some data into it. For example, when we get a new order for a user,
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we want to make sure that that user already exists and, if not, create one and then associate the order,
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which we're going to insert into the database with them. So recall I created this handy utility session context.
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SQLAlchemy uses the unit of work session concept, but it doesn't naturally follow with blocks or other language constructs.
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To make that more consistent and automatic in the GitHub Repo, you'll find our session context here, and we say, commit_on_success=True,
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which means if you leave the with block successfully, apply all those changes. If there's an error,
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somehow don't apply the changes, and then we're just going to go do a query for the user, and we're gonna find them by email or phone number.
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So we're gonna use the or_ operator. I would say first to give us the one and only one or give us none If there is no user didn't exist,
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we're going to quick create one, and there's a session.add and then we're going to create an order and we're
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going to say this user, follow their relationship independent order to it and that will both update the user if necessary,
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and insert the order into the database when we leave this with Block because our session finished up sucessfully.