Building Data-Driven Web Apps with Flask and SQLAlchemy Transcripts
Chapter: Routing and URLs
Lecture: Concept: Refactoring view methods with Flask blueprints
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Before we get to the rest of our routing
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let's review this idea of factoring our view methods
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into separate files with Flask Blueprints.
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So there's two parts here
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first we work on the file that contains the view methods
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that we're breaking a little bit of our web app out into.
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So here's let look at views/packages.py
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okay we're going to import flask, but instead of saying
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flask.app we say flask.blueprint
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give it a friendly name
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we give it an import name and a template folder.
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That creates a blueprint and just like before
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we say blueprint.route and from there on
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it's pretty much exactly the same
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just use the word blueprint instead of app.
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But don't forget, we also have to now go back and register
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these after the blueprints have been created.
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So in our main start-up code
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in our example, which is app.py
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we're going to import that module
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that contains the extra functions.
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I'm going to create the app just as normal
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and then we're going to register the blueprint
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so app.register_blueprints and give it the blueprint
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from that other module.
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We can do this with as many pieces of we want to
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break it up into and then we just say app.run.
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I really love this pattern.
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It drives me crazy when applications are crammed
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all into one file.
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This helps you organize your codes
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you can quickly find the view methods
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the templates
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all the stuff that is related to one part of your website
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so I highly encourage you to use this.
