1 Environment
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$ node -v
v14.17.0
$ npm -v
6.14.13
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2 Install MongoDB
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$ brew tap mongodb/brew
$ brew install mongodb-community@4.4
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Ref. MongoDB document
Warning
$ brew install mongodb is failed as mongodb is removed from brew.
3 Start / Stop MongoDB
3.1 Start
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$ brew services start mongodb-community@4.4
...
==> Successfully started `mongodb-community` (label: homebrew.mxcl.mongodb-community)
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Then client can access to MongoDB
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$ mongo
MongoDB shell version v4.4.5
connecting to: mongodb://127.0.0.1:27017/?compressors=disabled&gssapiServiceName=mongodb
Implicit session: session { "id" : UUID("f44a65e2-9ec7-4ae5-82dd-bb51839f6f2d") }
MongoDB server version: 4.4.5
Welcome to the MongoDB shell.
For interactive help, type "help".
For more comprehensive documentation, see
https://docs.mongodb.com/
Questions? Try the MongoDB Developer Community Forums
https://community.mongodb.com
...
>
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3.2 Stop
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$ brew services stop mongodb-community@4.4
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4 database commands
Show test database
Show all database
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> show dbs
admin 0.000GB
config 0.000GB
local 0.000GB
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Create and switch to new DB.
show dbs does not show the new db before adding data.
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> use news_db
switched to db news_db
> db
news_db
> show dbs
admin 0.000GB
config 0.000GB
local 0.000GB
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Insert data to db
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> use news_db
switched to db news_db
> db
news_db
> db.article.insert({
... title: "test-title",
... summary: "the first article for test",
... author: "author1",
... published: 2021-05-19,
... content: "test ends up in just a test........"
... })
WriteResult({ "nInserted" : 1 })
> show dbs
admin 0.000GB
config 0.000GB
local 0.000GB
news_db 0.000GB
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MongoDB allows to add record with different parameters from prior data like:
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> db.article.insert({
... title: "test-title2",
... author: "author2",
... distributed: "2021-05-12",
... media: "web",
... content: "test finished"
... })
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find()
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> db.article.find()
{ "_id" : ObjectId("60a51250c8ad18e364d94d51"), "title" : "test-title", "summary" : "the first article for test", "author" : "author1", "published" : 1997, "content" : "test ends up in just a test........" }
{ "_id" : ObjectId("60a51a6fc8ad18e364d94d52"), "title" : "test-title2", "author" : "author2", "distributed" : "2021-05-12", "media" : "web", "content" : "test finished" }
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find() with parameter
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> db.article.find({_id : ObjectId("60a51a6fc8ad18e364d94d52")})
{ "_id" : ObjectId("60a51a6fc8ad18e364d94d52"), "title" : "test-title2", "author" : "author2", "distributed" : "2021-05-12", "media" : "web", "content" : "test finished" }
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findOne()
Randomly find one record
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> db.article.findOne()
{ "_id" : ObjectId("60a51250c8ad18e364d94d51"), "published" : "2021-05-19" }
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remove()
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> db.article.remove({_id: ObjectId("60a51250c8ad18e364d94d51")})
WriteResult({ "nRemoved" : 1 })
> db.article.find()
{ "_id" : ObjectId("60a51a6fc8ad18e364d94d52"), "title" : "test-title2", "author" : "author2", "distributed" : "2021-05-12", "media" : "web", "content" : "test finished" }
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References