| SQL | Other Name |
|---|
| Tables | Collections |
| rows/recods | Documents |
BSON(BinaryJSON)
JSON-like storage format
_id field: primary key If driver fails to provide a _id field with a unique ObjectId, the mongod service will add it automatically
example
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| {
"_id": ObjectId("52d02240e4b01d67d71ad577"),
"title": "First Blog Post",
"comments": [
...
]
}
|
MongoDB replica set
The reason of Replication of databases
- protaction data to recover from hardware failure
- Increate read capacity
Start MongoDB
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| mongod
mongosh
use mean
show dbs
|
update()
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| mean > db.posts.update({"user":"alice"},{$set:{"title":"Fourth Post"}},{multi:true})
# output
{
acknowledged: true,
insertedId: null,
matchedCount: 1,
modifiedCount: 1,
upsertedCount: 0
}
|
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| mean> db.posts.find()
[
{
_id: ObjectId("6512f266594890cfb846b144"),
title: 'First Post',
user: 'bob'
},
{
_id: ObjectId("6512f301594890cfb846b145"),
title: 'Second Post',
user: 'pop'
},
{
_id: ObjectId("6512f395594890cfb846b146"),
title: 'Fourth Post',
user: 'alice'
}
]
|
save()
remove()
- Can accept up to two arguments
- first argument: the deletion criteria
- second argument: indicates whether or not to remove multiple documents
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| yarn init
yarn init v1.22.19
question name (WEEK4VITE):
question version (1.0.0):
question description:
question entry point (index.js):
question repository url:
question author: Jaekyeong Jang
question license (MIT):
question private:
success Saved package.json
Done in 37.65s.
|
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| yarn add v1.22.19
info No lockfile found.
[1/4] Resolving packages...
[2/4] Fetching packages...
[3/4] Linking dependencies...
[4/4] Building fresh packages...
success Saved lockfile.
success Saved 32 new dependencies.
info Direct dependencies
└─ nodemon@3.0.1
info All dependencies
├─ abbrev@1.1.1
├─ anymatch@3.1.3
├─ balanced-match@1.0.2
├─ binary-extensions@2.2.0
├─ brace-expansion@1.1.11
├─ braces@3.0.2
├─ chokidar@3.5.3
├─ concat-map@0.0.1
├─ debug@3.2.7
├─ fill-range@7.0.1
├─ glob-parent@5.1.2
├─ has-flag@3.0.0
├─ ignore-by-default@1.0.1
├─ is-binary-path@2.1.0
├─ is-extglob@2.1.1
├─ is-glob@4.0.3
├─ is-number@7.0.0
├─ lru-cache@6.0.0
├─ minimatch@3.1.2
├─ ms@2.1.3
├─ nodemon@3.0.1
├─ nopt@1.0.10
├─ normalize-path@3.0.0
├─ picomatch@2.3.1
├─ pstree.remy@1.1.8
├─ readdirp@3.6.0
├─ simple-update-notifier@2.0.0
├─ supports-color@5.5.0
├─ to-regex-range@5.0.1
├─ touch@3.1.0
├─ undefsafe@2.0.5
└─ yallist@4.0.0
Done in 1.08s.
|
Select Framwork -> React TypeScript + SWC
cd vite-project yarn yarn dev
