October 2015
Intermediate to advanced
368 pages
8h 49m
English
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The model
We have been using ndb.Model so far, but didn't look at the class in detail. The following are the three groups of things that we need to look into:
- The constructor
- The class methods
- The instance methods
Let's look at these in turn.
The constructor
We have been using constructor throughout our examples, as follows:
Listing(title="Civic 1995 for Sale")
What can you pass to the constructor? Basically, all the properties that you declared on the model itself can be supplied as keyword arguments for initial values while creating the instance. Besides this, the following can be supplied:
- ID: This is either an integer or a string that you wish to use as an identifier instead of the autogenerated one using the
idkeyword argument. If an ID is provided, ...
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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.