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![{
}
!
"_id": ObjectId("51638f8332e9bc556fe86de7"),
"dstats": [
{
"+": "5",
"-": "0",
"f": "gitstreamer.py"
},
{
"+": "3",
"-": "3",
"f": "post-commit.py"
}
],
"author": "ranman",
"ts": ISODate("2013-04-08T19:48:11-0400"),
"project": "gitstreamer",
"msg": "turning this into a webapp"](https://image.slidesharecdn.com/schema-design-140117164146-phpapp02/85/Schema-Design-in-MongoDB-TriMug-Meetup-North-Carolina-24-320.jpg)
![test> db.test.find()
Fetched 0 record(s) in 1ms -- Index[none]](https://image.slidesharecdn.com/schema-design-140117164146-phpapp02/85/Schema-Design-in-MongoDB-TriMug-Meetup-North-Carolina-28-320.jpg)
![test> db.test.find()
Fetched 0 record(s) in 1ms -- Index[none]
test> db.test.insert({'hello': 'world'})
Inserted 1 record(s) in 1ms
Insert WriteResult({
"ok": 1,
"n": 1
})](https://image.slidesharecdn.com/schema-design-140117164146-phpapp02/85/Schema-Design-in-MongoDB-TriMug-Meetup-North-Carolina-29-320.jpg)
![test> db.test.find()
Fetched 0 record(s) in 1ms -- Index[none]
test> db.test.insert({'hello': 'world'})
Inserted 1 record(s) in 1ms
Insert WriteResult({
"ok": 1,
"n": 1
})
test> db.test.find({'hello': 'world'})
{
"_id": ObjectId("52d61af21486ef9e06d6d41a"),
"hello": "world"
}
Fetched 1 record(s) in 0ms -- Index[none]](https://image.slidesharecdn.com/schema-design-140117164146-phpapp02/85/Schema-Design-in-MongoDB-TriMug-Meetup-North-Carolina-30-320.jpg)
![test> db.test.find()
Fetched 0 record(s) in 1ms -- Index[none]
test> db.test.insert({'hello': 'world'})
Inserted 1 record(s) in 1ms
Insert WriteResult({
"ok": 1,
"n": 1
})
test> db.test.find({'hello': 'world'})
{
"_id": ObjectId("52d61af21486ef9e06d6d41a"),
"hello": "world"
}
Fetched 1 record(s) in 0ms -- Index[none]
test> db.test.update({'hello': 'world'}, {$set: {'hello': 'welt'}})
Updated 1 existing record(s) in 0ms
Update WriteResult({
"ok": 1,
"n": 1
})](https://image.slidesharecdn.com/schema-design-140117164146-phpapp02/85/Schema-Design-in-MongoDB-TriMug-Meetup-North-Carolina-31-320.jpg)
![patron = {
_id: ObjectId("52d7173817d8bbd9564613cd"),
name: 'Joe Schmoe'
}
!
address = {
patron_id: ObjectId("52d7173817d8bbd9564613cd"),
street: "100 Five Bridge Rd",
city: "Clinton",
state: "NC",
zip: 28723
}
>patron = db.patron.find({'name': 'Joe Schmoe'})[0]
>db.address.find('patron_id': patron._id)](https://image.slidesharecdn.com/schema-design-140117164146-phpapp02/85/Schema-Design-in-MongoDB-TriMug-Meetup-North-Carolina-39-320.jpg)
![book = {
_id: ObjectID(...),
title: "MongoDB",
authors: ['Kristina Chodorow', 'Mike Dirolf'],
published_date: ISODate('2010-09-24'),
pages: 216,
language: 'English',
publisher: {
name: "O'Reilly Media",
founded: "1980",
location: "CA"
}
}](https://image.slidesharecdn.com/schema-design-140117164146-phpapp02/85/Schema-Design-in-MongoDB-TriMug-Meetup-North-Carolina-42-320.jpg)
![publisher = {
_id: "oreilly",
name: "O'Reilly Media",
founded: "1980",
location: "CA"
}
book = {
_id: ObjectID(...),
title: "MongoDB",
authors: ['Kristina Chodorow', 'Mike Dirolf'],
published_date: ISODate('2010-09-24'),
pages: 216,
language: 'English',
publisher_id: 'oreilly'
}](https://image.slidesharecdn.com/schema-design-140117164146-phpapp02/85/Schema-Design-in-MongoDB-TriMug-Meetup-North-Carolina-44-320.jpg)
![publisher = {
name: "OReilly Media",
founded: "1980",
location: "CA"
books: [ ObjectId(...), ... ]
}
book = {
_id: ObjectID(...),
title: "MongoDB",
authors: ['Kristina Chodorow', 'Mike Dirolf'],
published_date: ISODate('2010-09-24'),
pages: 216,
language: "English"
}](https://image.slidesharecdn.com/schema-design-140117164146-phpapp02/85/Schema-Design-in-MongoDB-TriMug-Meetup-North-Carolina-45-320.jpg)
![patron = {
_id: ObjectId("52d7173817d8bbd9564613cd"),
name: "Joe Bookreader",
address: {...},
join_date: ISODate("2011-10-15"),
books: [
{_id: ObjectID(...), title: "MongoDB",
author: "Kristina C.", ...},
{_id: ObjectId(...), title: "Postgres",
author: "Randall H.", ...}
]
}](https://image.slidesharecdn.com/schema-design-140117164146-phpapp02/85/Schema-Design-in-MongoDB-TriMug-Meetup-North-Carolina-47-320.jpg)
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Uploaded byRandall Hunt
Schema Design in MongoDB - TriMug Meetup North Carolina
This document provides an overview of schema design in MongoDB given different types of data relationships. It discusses modeling one-to-one, one-to-many, and many-to-many relationships using embedding, references, and hybrid approaches. Examples are given for a library management use case to model patrons, books, authors, and publishers and the tradeoffs of different schema designs depending on the growth and relationships of the data.
