![MongoDB ERD
Article
• Name
• Slug
• Publish Date
• Text
• Author
Comment[]
• Comment
• Date
• Author
Tag[]
• Value
Category[]
• Value
User
• Name
• Email Address](https://image.slidesharecdn.com/mongodb-161208185211/85/Introduction-to-MongoDB-11-320.jpg)
![Creating a Blog Article
> db.articles.insert({
title: ‘Hello World’,
body: ‘This is my first blog post’,
date: new Date(‘2013-06-20’),
username: ‘eng.boustani’,
tags: [‘adventure’, ‘mongodb’],
comments: [ ]
})](https://image.slidesharecdn.com/mongodb-161208185211/85/Introduction-to-MongoDB-18-320.jpg)
![Finding the Article
> db.articles.find().pretty()
{
"_id" : ObjectId("51c3bafafbd5d7261b4cdb5a"),
"title" : "Hello World",
"body" : "This is my first blog post",
"date" : ISODate("2013-06-20T00:00:00Z"),
"username" : "eng.boustani",
"tags" : [ "adventure", "mongodb"],
"comments" : [ ]
}](https://image.slidesharecdn.com/mongodb-161208185211/85/Introduction-to-MongoDB-19-320.jpg)
![Finding the Article
> db.articles.find({
_id : ObjectId("51c3bafafbd5d7261b4cdb5a")
}).pretty()
{
"_id" : ObjectId("51c3bafafbd5d7261b4cdb5a"),
"title" : "Hello World",
"body" : "This is my first blog post",
"date" : ISODate("2013-06-20T00:00:00Z"),
"username" : "eng.boustani",
"tags" : [ "adventure", "mongodb"],
"comments" : [ ]
}](https://image.slidesharecdn.com/mongodb-161208185211/85/Introduction-to-MongoDB-20-320.jpg)
![Querying An Array
> db.articles.find({ tags : ‘adventure’ }).pretty()
{
"_id" : ObjectId("51c3bafafbd5d7261b4cdb5a"),
"title" : "Hello World",
"body" : "This is my first blog post",
"date" : ISODate("2013-06-20T00:00:00Z"),
"username" : "eng.boustani",
"tags" : [ "adventure", "mongodb"],
"comments" : [ ]
}](https://image.slidesharecdn.com/mongodb-161208185211/85/Introduction-to-MongoDB-21-320.jpg)
![Article with Comment Embedded
> db.articles.find({ username: "eng.boustani" }).pretty()
{
"_id" : ObjectId("51c3bcddfbd5d7261b4cdb5b"),
"body" : "This is my first blog post",
"comments" : [
{
"name" : "Asghar Sohrabi",
"comment" : "Awesome Post"
}
],
"date" : ISODate("2013-06-20T00:00:00Z"),
"tags" : ["adventure", "mongodb"],
"title" : "Hello World",
"username" : "eng.boustani"
}](https://image.slidesharecdn.com/mongodb-161208185211/85/Introduction-to-MongoDB-23-320.jpg)
Introduction to MongoDB
- 1. Build innovative modern applications that create a competitive advantage.
- 3. Introducing • MongoDB is an open-source, document database designed for ease of development and scaling.
- 4. Database Types RDBMS (Relational Database Management System) SQL Server, Mysql, Oracle NoSQL (Non-relational Operational Stores) MangoDB, Cassandra, Redis
- 5. Document-oriented database • Document-oriented databases are inherently a subclass of the key-value store, another NoSQL database concept. • Document databases contrast strongly with the traditional relational database (RDB): • Relational databases generally store data in separate tables that are defined by the programmer, and a single object may be spread across several tables. • Document databases store all information for a given object in a single instance in the database, and every stored object can be different from every other.
- 6. Database Landscape Memcached MongoDB RDBMS Depth of Functionality Scalability&Performance
- 7. Terminology RDBMS MongoDB Table, View Collection Row Document Index Index Join Embedded Document Foreign Key Reference Partition Shard
- 8. Features • Documents are stored in BSON (binary JSON) • Rich, javascript-based query syntax • Allows us to deep, nested queries • Efficient binary large object store via GridFS • i.e. store images, videos, anything
- 9. Let’s Build a Blog with MongoDB • Entities in our Blogging System: • Users • Articles • Comments • Tags • Categories
- 10. Typical (relational) ERD Category • Name • URL Tag • Name • URL Comment • Comment • Date • Author User • Name • Email Address Article • Name • Slug • Publish Date • Text
- 11. MongoDB ERD Article • Name • Slug • Publish Date • Text • Author Comment[] • Comment • Date • Author Tag[] • Value Category[] • Value User • Name • Email Address
- 12. BSON • BSON is a computer data interchange format used mainly as a data storage and network transfer format in the MongoDB database. It is a binary form for representing simple data structures, associative arrays (called objects or documents in MongoDB), and various data types of specific interest to MongoDB. The name "BSON" is based on the term JSON and stands for "Binary JSON".
- 13. Start with an object (or array, hash, dict, etc) > var user = { username: ‘eng.boustani’, first_name: ‘Hossein’, last_name: ‘Boustani’ }
- 14. Insert the Record > db test > use blog switched to db blog // syntax is db.<collection>.<command> > db.users.insert(user)
- 15. Retrieve the Record again // get one document (don’t care which one) > db.users.findOne() { "_id" : ObjectId("50804d0bd94ccab2da652599"), "username" : "eng.boustani", "first_name" : "Hossein", "last_name" : "Boustani" }
- 16. _id • _id is the primary key in MongoDB • Any unique immutable value could be used • Automatically created as an ObjectId if not provided • Automatically indexed
- 17. ObjectId • ObjectId is a special 12 byte value • Guaranteed to be unique across your cluster • ObjectId("50804d0bd94ccab2da652599") ts mac pid inc
- 18. Creating a Blog Article > db.articles.insert({ title: ‘Hello World’, body: ‘This is my first blog post’, date: new Date(‘2013-06-20’), username: ‘eng.boustani’, tags: [‘adventure’, ‘mongodb’], comments: [ ] })
- 19. Finding the Article > db.articles.find().pretty() { "_id" : ObjectId("51c3bafafbd5d7261b4cdb5a"), "title" : "Hello World", "body" : "This is my first blog post", "date" : ISODate("2013-06-20T00:00:00Z"), "username" : "eng.boustani", "tags" : [ "adventure", "mongodb"], "comments" : [ ] }
- 20. Finding the Article > db.articles.find({ _id : ObjectId("51c3bafafbd5d7261b4cdb5a") }).pretty() { "_id" : ObjectId("51c3bafafbd5d7261b4cdb5a"), "title" : "Hello World", "body" : "This is my first blog post", "date" : ISODate("2013-06-20T00:00:00Z"), "username" : "eng.boustani", "tags" : [ "adventure", "mongodb"], "comments" : [ ] }
- 21. Querying An Array > db.articles.find({ tags : ‘adventure’ }).pretty() { "_id" : ObjectId("51c3bafafbd5d7261b4cdb5a"), "title" : "Hello World", "body" : "This is my first blog post", "date" : ISODate("2013-06-20T00:00:00Z"), "username" : "eng.boustani", "tags" : [ "adventure", "mongodb"], "comments" : [ ] }
- 22. Using Update to Add a Comment // the syntax is: update( what, how) > db.articles.update({ _id: ObjectId("51c3bcddfbd5d7261b4cdb5b") }, { "$push" : { "comments" : { "name" : "Asghar Sohrabi", "comment" : "Awesome Post" } })
- 23. Article with Comment Embedded > db.articles.find({ username: "eng.boustani" }).pretty() { "_id" : ObjectId("51c3bcddfbd5d7261b4cdb5b"), "body" : "This is my first blog post", "comments" : [ { "name" : "Asghar Sohrabi", "comment" : "Awesome Post" } ], "date" : ISODate("2013-06-20T00:00:00Z"), "tags" : ["adventure", "mongodb"], "title" : "Hello World", "username" : "eng.boustani" }
- 24. Remove Comments / Articles // remove comment with $pull > var last_comment = { "name" : "Asghar Sohrabi", "comment" : "Awesome Post" } > db.articles.update({ _id: ObjectId("51c3bcddfbd5d7261b4cdb5b") }, { $pull : { comments: last_comment } }) // remove article > db.articles.remove({ _id: ObjectId("51c3bcddfbd5d7261b4cdb5b") })
- 25. MongoDB Drivers • MongoDB has native bindings for over 12 languages
- 26. MongoDB Tools • Robomongo • MongoDB Compass • MongoDB Cloud Manager • MongoMonitor
- 27. Some Companies using MongoDB
- 28. Book MongoDB: The Definitive Guide Kristina Chodorow
- 29. Book MongoDB and Python Niall O'Higgins
- 30. Book PHP and MongoDB Web Development Rubayeet Islam
- 31. Resources • mongodb.org • tutorialspoint.com/mongodb/ • github.com/mongodb/
- 32. Question?
- 33. Thank You Your time is limited, so don’t waste it Living someone else’s life -Steve Jobs