Building data-driven web apps with Flask and SQLAlchemy Transcripts
Chapter: Routing and URLs
Lecture: Concept: Create route from url
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Let's really quickly review how given a URL
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we're going to define a view method
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and a route in Flask to match that.
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So suppose we're going to go to /help/topic
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maybe there's some kind of Help System
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/help/faqs, /help/gettingstarted, I don't know
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and those are going to return different bits of detail.
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So how do we create something in Flask to handle that
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and pass topic to that function?
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So we're going to add an app.route decorator
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as you do for all the view methods.
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I'm going to call this Help
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'cause that seems reasonable to me
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but you can call the function whatever you want
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as long as it's distinct.
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Then it's going to be /help/, that's the static part
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it's always like that, no variables are passed there.
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No data is being passed there.
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But then, the part that goes on the end /summary
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/gettingstarted, /faq
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we want to pass that into the function
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so we put in <topic_name>
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So that defines a variable
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that gets passed into our function, topic_name
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and I like to give them type annotations
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'cause sometimes, as we say you can make them integers
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and what not.
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So we're going to pass that in
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and then you just do your work, right?
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Go to the database, call the service
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whatever you got to do to render, to display that content.
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Super nice and easy to work with routing system
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you don't have to work with regular expressions
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or other crazy stuff that some other frameworks have you do.
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No you just put stuff in angle brackets
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and that gets passed along as parameters to your methods.
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Couldn't be easier.
