April 2019
Beginner to intermediate
244 pages
6h 34m
English
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Downsides to Locking Schemas to Tables
When setting up schemas for the first time, it’s natural to add fields that exactly match your database tables. But this can have some unintended side effects down the line.
As we’ve seen, schemas become the backbone of our changesets. And changesets are what we to use parse user-submitted data and convey error messages about that data to the user.
For example, the phoenix_ecto package implements behaviors for the Phoenix web framework such that changesets can be used as the backing data structure for Phoenix forms. To take advantage of the conveniences provided by the Phoenix.Form module, your web forms need to match your changeset structure (and therefore the underlying schema) as much as possible.
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.