September 2017
Beginner to intermediate
396 pages
9h 46m
English
Content preview from Haskell Cookbook
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Working with Persistent
In this recipe, we will work with the persistent library, which has been designed to abstract the concept of defining the schema (the data models and the relationships between them), and working with a storage backend (such as SQLite, and PostgreSQL).
In this recipe, we will create a model to store the following data:
- User details (username, email)
- Stock that the user is interested in (exchange, symbol)
We will use SQLite as the backend, as it does not require any installation. But the model defined here can be worked out with any persistent backend, such as PostgreSQL. The model definition in the persistent library is created through Template Haskell. Template Haskell enables programmers to generate code at compile ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
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.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
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.