Building data-driven web apps with Flask and SQLAlchemy Transcripts
Chapter: MongoDB edition
Lecture: The rest of the entities
Login or
purchase this course
to watch this video and the rest of the course contents.
0:00
Over here in our NoSQL folder
0:01
we have our setup and we have our users.
0:03
But there's a bunch of stuff we need
0:04
like packages and maintainers and licenses.
0:08
You saw how easy it was and how similar this was
0:10
to SQLAlchemy for users.
0:12
Let me just drop in the rest.
0:13
There's no reason to watch me type it all out.
0:15
So we can go through.
0:16
And here we have the downloads which are straightforward.
0:20
I guess we don't need table name anymore.
0:22
We've got package_id and release_id and all these things.
0:26
And of course we're setting up indexes on them.
0:29
Languages, this is again similar to what we had before.
0:33
Licenses also. You are overwriting the type of key
0:37
which is certainly possible
0:39
something you can do just like we are in packages.
0:42
Over here, we're setting the string field
0:43
to be a primary key.
0:45
This, let's just store a string
0:46
instead of that object ID type of thing.
0:49
And everything along here looks pretty much the same
0:51
as it was in SQLAlchemy
0:52
but here's where we start to leverage
0:55
the hierarchical aspect of document databases
0:58
over tabular stuff say, in relational.
1:01
Here's our maintainers.
1:02
Previously, we had a maintainers table
1:05
and what it stored was
1:07
project ID, maintainer ID
1:09
and it was just the normalization table
1:11
for the many-to-many relationship.
1:13
We don't have to do that here.
1:14
We can store, actually a list of all the maintainer IDs
1:18
which then are relationships navigating back
1:21
keys back to the user table.
1:24
So we don't need that normalization table
1:25
we know what project we're on
1:27
and these are all the IDs that are maintainers of it.
1:30
And we can do super nice queries down into this list
1:32
and all sorts of stuff like that.
1:34
So we're not leveraging too much among it to be here
1:37
but here's one interesting part of it right there.
1:40
Right, so that's all the other entities
1:42
that we might want to work with.
