MongoDB Practice

exercise.md

MongoDB Practice

MongoDB Exercise in mongo shell

Connect to a running mongo instance, use a database named mongo_practice.

Document all your queries in a javascript file to use as a reference.

Insert Documents

Insert the following documents into a movies collection.

title : Fight Club
writer : Chuck Palahniuk
year : 1999
actors : [
  Brad Pitt
  Edward Norton
]

title : Pulp Fiction
writer : Quentin Tarantino
year : 1994
actors : [
  John Travolta
  Uma Thurman
]

title : Inglorious Basterds
writer : Quentin Tarantino
year : 2009
actors : [
  Brad Pitt
  Diane Kruger
  Eli Roth
]

title : The Hobbit: An Unexpected Journey
writer : J.R.R. Tolkein
year : 2012
franchise : The Hobbit

title : The Hobbit: The Desolation of Smaug
writer : J.R.R. Tolkein
year : 2013
franchise : The Hobbit

title : The Hobbit: The Battle of the Five Armies
writer : J.R.R. Tolkein
year : 2012
franchise : The Hobbit
synopsis : Bilbo and Company are forced to engage in a war against an array of combatants and keep the Lonely Mountain from falling into the hands of a rising darkness.

title : Pee Wee Herman's Big Adventure

title : Avatar

Query / Find Documents

query the movies collection to

1. get all documents
2. get all documents with writer set to "Quentin Tarantino"
3. get all documents where actors include "Brad Pitt"
4. get all documents with franchise set to "The Hobbit"
5. get all movies released in the 90s
6. get all movies released before the year 2000 or after 2010

Update Documents

1. add a synopsis to "The Hobbit: An Unexpected Journey" : "A reluctant hobbit, Bilbo Baggins, sets out to the Lonely Mountain with a spirited group of dwarves to reclaim their mountain home - and the gold within it - from the dragon Smaug."
2. add a synopsis to "The Hobbit: The Desolation of Smaug" : "The dwarves, along with Bilbo Baggins and Gandalf the Grey, continue their quest to reclaim Erebor, their homeland, from Smaug. Bilbo Baggins is in possession of a mysterious and magical ring."
3. add an actor named "Samuel L. Jackson" to the movie "Pulp Fiction"

Text Search

1. find all movies that have a synopsis that contains the word "Bilbo"
2. find all movies that have a synopsis that contains the word "Gandalf"
3. find all movies that have a synopsis that contains the word "Bilbo" and not the word "Gandalf"
4. find all movies that have a synopsis that contains the word "dwarves" or "hobbit"
5. find all movies that have a synopsis that contains the word "gold" and "dragon"

Delete Documents

1. delete the movie "Pee Wee Herman's Big Adventure"
2. delete the movie "Avatar"

Relationships

Insert the following documents into a users collection

username : GoodGuyGreg
first_name : "Good Guy"
last_name : "Greg"

username : ScumbagSteve
full_name :
  first : "Scumbag"
  last : "Steve"

Insert the following documents into a posts collection

username : GoodGuyGreg
title : Passes out at party
body : Wakes up early and cleans house

username : GoodGuyGreg
title : Steals your identity
body : Raises your credit score

username : GoodGuyGreg
title : Reports a bug in your code
body : Sends you a Pull Request

username : ScumbagSteve
title : Borrows something
body : Sells it

username : ScumbagSteve
title : Borrows everything
body : The end

username : ScumbagSteve
title : Forks your repo on github
body : Sets to private

Insert the following documents into a comments collection

username : GoodGuyGreg
comment : Hope you got a good deal!
post : [post_obj_id]

where [post_obj_id] is the ObjectId of the posts document: "Borrows something"

username : GoodGuyGreg
comment : What's mine is yours!
post : [post_obj_id]

where [post_obj_id] is the ObjectId of the posts document: "Borrows everything"

username : GoodGuyGreg
comment : Don't violate the licensing agreement!
post : [post_obj_id]

where [post_obj_id] is the ObjectId of the posts document: "Forks your repo on github

username : ScumbagSteve
comment : It still isn't clean
post : [post_obj_id]

where [post_obj_id] is the ObjectId of the posts document: "Passes out at party"

username : ScumbagSteve
comment : Denied your PR cause I found a hack
post : [post_obj_id]

where [post_obj_id] is the ObjectId of the posts document: "Reports a bug in your code"

Querying related collections

1. find all users
2. find all posts
3. find all posts that was authored by "GoodGuyGreg"
4. find all posts that was authored by "ScumbagSteve"
5. find all comments
6. find all comments that was authored by "GoodGuyGreg"
7. find all comments that was authored by "ScumbagSteve"
8. find all comments belonging to the post "Reports a bug in your code"

Hello @theRemix, I just wanna let you know, that I'd adapted and translated part of this amazing exercise to spanish.

Text Search Result Answers

1. Should get 3
2. Should get 1
3. Should get 2
4. Should get 2
5. Should get 1

Last part

1. 2
2. 6
3. 3
4. 3
5. 5
6. 3
7. 2
8. 5

Where can I find the answers to these questions.

Answer

1. db.movies.find()
2. db.movies.find({writer: "Quentin Tarantino"})
3. db.movies.find({actors: "Brad Pitt"})
4. db.movies.find({franchise: "The Hobbit"})
5. db.movies.find({$and: [{year: {$gt: 1900}}, {year: {$lt: 2000}}]})
6. db.movies.find({$or: [{year: {$lt: 2000}}, {year: {$gt: 2010}}]})

UPDATE

1. db.movies.update({title: "The Hobbit: An Unexpected Journey"}, {synopsis: "A reluctant hobbit, Bilbo Baggins, sets out to the Lonely Mountain with a spirited group of dwarves to reclaim their mountain home - and the gold within it - from the dragon Smaug."})
2. db.movies.update({title: "The Hobbit: The Desolation of Smaug"}, {synopsis: "The dwarves, along with Bilbo Baggins and Gandalf the Grey, continue their quest to reclaim Erebor, their homeland, from Smaug. Bilbo Baggins is in possession of a mysterious and magical ring."})
3. db.movies.update({title: "Pulp Fiction"}, {$push: {actors: "Samuel L. Jackson"}})

TEXT SEARCH

1. db.movies.find({$text: {$search: "Bilbo"}})
2. db.movies.find({$text: {$search: "Gandalf"}})
3. db.movies.find({$text: {$search: "Bilbo -Gandalf"}})
4. db.movies.find({$text: {$search: "dwarves hobbit"}})
5. db.movies.find({$text: {$search: "gold dragon"}})

DELETE DOCUMENT

1. db.movies.remove({title: "Pee Wee Herman's Big Adventure"})
2. db.movies.remove({title: "Avatar"})

LAST PART

1. db.users.find()
2. db.posts.find()
3. db.posts.find({username: "GoodGuyGreg"})
4. db.posts.find({username: "ScumbagSteve"})
5. db.comments.find()
6. db.comments.find({username: "GoodGuyGreg"})
7. db.comments.find({username: "ScumbagSteve"})

how do you insert the record of title : Pee Wee Herman's Big Adventure?

Solution in pymongo

mayurghadiya ... your most of the solution are correct but the 3rd one searching of text is not working. i think it could be solved by using Regex.

Hey @Dean321,
Here is your solution
db.movies.insert({title : "Pee Wee Herman's Big Adventure"});

for check your inserted document use:
db.movies.find().pretty();

I recently learn about mongodb,can someone know me what's the solution of Last query which is :
find all comments belonging to the post "Reports a bug in your code"

I am using mongo 2.4.9 version.

Thanks

@sachindevtomar, to make the text search work, first you need to create an index on the synopsis key. After that text search operations will work.
db.movies.createIndex({synopsis: "text"})
Read the documentation at https://docs.mongodb.com/manual/text-search/

Solutions: https://gist.github.com/ssi-anik/71b49be64c7d9724ec863ced9b4e750a

get all documents where actors include "Brad Pitt".
When i am using db.movies.find({actors:"Brad Pitt"}) i am getting output only from the first query inserted.But there are more values on Brad Pitt. So, How can i get all the multiple values named Bradd Pitt?

TEXT SEARCH

1. db.movies.find({$text: {$search: "Bilbo"}})
2. db.movies.find({$text: {$search: "Gandalf"}})
3. db.movies.find({$text: {$search: "Bilbo -Gandalf"}})
4. db.movies.find({$text: {$search: "dwarves hobbit"}})
5. db.movies.find({$text: {$search: "gold dragon"}})

#5 should actually be db.movies.find({$text: {$search: '"gold" "dragon"'}}) since we want "gold" AND "dragon" to both be in the returned search.

My answers :
//Insert data
db.movies.insertMany([
{
title: 'Fight Club',
writer: 'Chuck Palahniuk',
year: 1999,
actors: [
'Brad Pitt',
'Edward Norton'
]
},
{
title: 'Pulp Fiction',
writer: 'Quentin Tarantino',
year: 1994,
actors: [
'John Travolta',
'Uma Thurman'
]
},
{
title: 'Inglorious Basterds',
writer: 'Quentin Tarantino',
year: 2009,
actors: [
'Brad Pitt',
'Diane Kruger',
'Eli Roth'
]
},
{
title: 'The Hobbit: An Unexpected Journey',
writer: 'J.R.R.Tolkein',
year: 2012,
franchise: 'The Hobbit'
},
{
title: 'The Hobbit: The Desolation of Smaug',
writer: 'J.R.R.Tolkein',
year: 2013,
franchise: 'The Hobbit'
},
{
title: 'The Hobbit: The Battle of the Five Armies',
writer: 'J.R.R.Tolkein',
year: 2012,
franchise: 'The Hobbit',
synopsis: 'Bilbo and Company are forced to engage in a war against an array of combatants and keep the Lonely Mountain from falling into the hands of a rising darkness.'
},
{
title: 'Pee Wee Herman's Big Adventure'
},
{
title: 'Avatar'
}
]);

//Query|Find
//1. Get all documents
db.movies.find().pretty();

//2.Get all documents with writer set to "Quentin Tarantino"
db.movies.find({ writer: 'Quentin Tarantino' }).pretty();

//3. Get all documents where actors include "Brad Pitt"
db.movies.find({ actors: 'Brad Pitt' }).pretty();

//4. Get all documents with franchise set to "The Hobbit"
db.movies.find({ franchise: 'The Hobbit' }).pretty();

//5.Get all movies released in the 90s
db.movies.find({ year: { $gte: 1990, $lte: 1999 } }).pretty();

//6.Get all movies released before the year 2000 or after 2010
db.movies.find({ $or: [{ year: { $lt: 2000 } }, { year: { $gt: 2010 } }] }).pretty();

//Update Documents
//1.add a synopsis to "The Hobbit: An Unexpected Journey" : "A reluctant hobbit, Bilbo Baggins, sets out to the Lonely Mountain with a spirited group of dwarves to reclaim their mountain home - and the gold within it - from the dragon Smaug."
db.movies.update({ title: 'The Hobbit: An Unexpected Journey' }, { $set: { synopsis: "A reluctant hobbit, Bilbo Baggins, sets out to the Lonely Mountain with a spirited group of dwarves to reclaim their mountain home - and the gold within it - from the dragon Smaug." } });

//2.add a synopsis to "The Hobbit: The Desolation of Smaug" : "The dwarves, along with Bilbo Baggins and Gandalf the Grey, continue their quest to reclaim Erebor, their homeland, from Smaug. Bilbo Baggins is in possession of a mysterious and magical ring."
db.movies.update({ title: 'The Hobbit: The Desolation of Smaug' }, { $set: { synopsis: "The dwarves, along with Bilbo Baggins and Gandalf the Grey, continue their quest to reclaim Erebor, their homeland, from Smaug. Bilbo Baggins is in possession of a mysterious and magical ring." } });

//3.add an actor named "Samuel L. Jackson" to the movie "Pulp Fiction"
db.movies.update({ title: 'Pulp Fiction' }, { $push: { actors: 'Samuel L. Jackson' } });

//Text Search
//1.find all movies that have a synopsis that contains the word "Bilbo"
db.movies.find({ synopsis: /Bilbo/g }).pretty();

//2.find all movies that have a synopsis that contains the word "Gandalf"
db.movies.find({ synopsis: /Gandalf/g }).pretty();

//3.find all movies that have a synopsis that contains the word "Bilbo" and not the word "Gandalf"
db.movies.find({ $and: [{ synopsis: /Bilbo/g }, { synopsis: { $not: /Gandalf/g } }] }).pretty();

//4.find all movies that have a synopsis that contains the word "dwarves" or "hobbit"
db.movies.find({ synopsis: /(dwarves|hobbit)/g }).pretty();

//5.find all movies that have a synopsis that contains the word "gold" and "dragon"
db.movies.find({ synopsis: /(gold.*dragon|dragon.*gold)/g }).pretty();

db.movies.find({ $and: [{ synopsis: /gold/g }, { synopsis: /dragon/g }] }).pretty();

//Delete Documents
//1. delete the movie "Pee Wee Herman's Big Adventure"
db.movies.deleteMany({ title: "Pee Wee Herman's Big Adventure" });

//2.delete the movie "Avatar"
db.movies.deleteMany({ title: "Avatar" });

//Relationships
//Insert the following documents into a users collection
db.users.insertMany([
{
username: "GoodGuyGreg",
first_name: "Good Guy",
last_name: "Greg"
},
{
username: "ScumbagSteve",
full_name: {
first: "Scumbag",
last: "Steve"
}
}
]);

//Insert the following documents into a posts collection
db.posts.insertMany([
{
username: "GoodGuyGreg",
title: "Passes out at party",
body: "Wakes up early and cleans house"
},
{
username: "GoodGuyGreg",
title: "Steals your identity",
body: "Raises your credit score"
},
{
username: "GoodGuyGreg",
title: "Reports a bug in your code",
body: "Sends you a Pull Request"
},
{
username: "ScumbagSteve",
title: "Borrows something",
body: "Sells it"
},
{
username: "ScumbagSteve",
title: "Borrows everything",
body: "The end"
},
{
username: "ScumbagSteve",
title: "Forks your repo on github",
body: "Sets to private"
}
]);

//Insert the following documents into a comments collection
db.comments.insertMany([
{
username: "GoodGuyGreg",
comment: "Hope you got a good deal!",
post: ObjectId("5f44d3a148197d7749864def")
},
{
username: "GoodGuyGreg",
comment: "Don't violate the licensing agreement!",
post: ObjectId("5f44d3a148197d7749864df0")
},
{
username: "GoodGuyGreg",
comment: "Don't violate the licensing agreement!",
post: ObjectId("5f44d3a148197d7749864df1")
},
{
username: "ScumbagSteve",
comment: "It still isn't clean",
post: ObjectId("5f44d3a148197d7749864dec")
},
{
username: "ScumbagSteve",
comment: "Denied your PR cause I found a hack",
post: ObjectId("5f44d3a148197d7749864dee")
}
]);

//Querying related collections
//1.find all users
db.users.find().pretty();

//2.find all posts
db.posts.find().pretty();

//3.find all posts that was authored by "GoodGuyGreg"
db.posts.find({ username: 'GoodGuyGreg' }).pretty();

//4.find all posts that was authored by "ScumbagSteve"
db.posts.find({ username: 'ScumbagSteve' }).pretty();

//5.find all comments
db.comments.find().pretty();

//6.find all comments that was authored by "GoodGuyGreg"
db.comments.find({ username: 'GoodGuyGreg' }).pretty();

//7.find all comments that was authored by "ScumbagSteve"
db.comments.find({ username: 'ScumbagSteve' }).pretty();

//8.find all comments belonging to the post "Reports a bug in your code"
db.posts.aggregate([
{
$match: { title: 'Reports a bug in your code' }
},
{
$lookup: {
from: 'comments',
localField: '_id',
foreignField: 'post',
as: 'comments'
}
}
]).pretty();