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ファイルDB_NeDB_のススメ.pdf
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moomoo-ya
July 02, 2015
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ファイルDB_NeDB_のススメ.pdf
moomoo-ya
July 02, 2015
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Transcript
ϑΝΠϧDB"NeDB" ͷεεϝ 2015.6.26 Isamu Suzuki Rakus co, ltd.
ླ ༐ • גࣜձࣾϥΫε • ٻॻൃߦαʔϏεΛ։ൃͯ͠·͢ • ࣄͰJavaʴJavaScriptগ͠ • ϓϥΠϕʔτJavaScriptʹશྗࢿத
• ࠷ۙPythonʹුؾͦ͠͏
ࠓͷ͓
Έͳ͞Μ
ͪΐͬͱͨ͠πʔϧΛ ࡞Δͱ͖Ͱ DB͍͍ͨͳ͊ ͱɺࢥ͏͜ͱ͋Γ·͢ΑͶʁ
Ͱ ηοτΞοϓ͕
(‘A`)ŵƃŪƄŞŤ
ͬͯͳΓ·ͤΜ͔ʁ
ͦΜͳ͋ͳͨʹ NeDB
ͬͯΔਓ Βͳ͍;Γਪ ! ͘͠ϐβͲ͏ͧ
Πϯετʔϧ npm install nedb --save ͍ͭͷҰߦʂ
ॳظԽ var NeDB = require(‘nedb'); var db = new NeDB({
filename: 'path/to/datafile' });
ॳظԽʢෳϑΝΠϧͷ߹ʣ var NeDB = require(‘nedb’); var db = {}; var
db.users = new NeDB({ filename: 'path/to/userfile' }); var db.items = new NeDB({ filename: 'path/to/itemfile' });
͍ํ(insert) db.users.insert({name: ‘hoge'}); ! //ෳϨίʔυͷૠೖ db.users.insert([ {name: 'foo'}, {name: 'bar'}
]);
͍ํ(insert) db.users.insert([ {name: 'foo'}, {name: 'bar'} ], function(err, newDoc){ //΄͛΄͛;ʔʔ
});
͍ํ(find) db.users.find({ name: 'fuga' }, function (err, docs) { //
΄͛;͕;ʔʔ }); db.users.find({ name: /f*uga/ },//ਖ਼نදݱ function (err, docs) { // ΄͛;͕;ʔʔ });
͍ํ(find & sort, skip, limit) db.users.find({ name: 'fuga' }) .sort({name:
-1}), //name߱ॱ .skip(1) //1݅Λඈͯ͠ .limit(5) //5݅औಘ .exec(function (err, docs) { // ΄͛;͕;ʔʔ });
͓͍ɺͪΐͬͱͯ
ͭ·Γ͜͏͍͏͜ͱ͔ʁ ʰզʑmongodbͱಉ͡ ߏจͰ࣮Ͱ͖Δ……ʱ
Exactly ʢͦͷͱ͓ΓͰ͍͟͝·͢ʣ ࡾ෦ऴΘΓ·ͨ͠Ͷ
͍ํ(update) db.users.update({ name: 'fuga' }, { name: 'fungaar' }, {
multi: true }, //ෳߦߋ৽ function (err, numReplaced) { // ΄͛;͕;ʔʔ });
͍ํ(remove) db.users.remove({ name: 'fuga' }, { name: 'fungaar' }, {
multi: true }, //ෳߦআ function (err, numRemoved) { // ΄͛;͕;ʔʔ });
NeDBͷAPI MongoDBͷαϒηοτ
ͭ·Γ
NeDBͰ࣮͓͚ͯ͠ MongoDBʹ ͙͢ҠߦͰ͖Δ
ͪΖΜ express-sessionͷ ηογϣϯετΞʹ connect-nedb-session-two ͱ͍͏Ϟδϡʔϧ͕͋Γ·͢
݁
NeDBͬͯ ্खʹखΛൈ͍ͯ ॻ͖͍ͨ͜ͱ͔Βॻ͜͏ʂ
࠷ޙʹ એ͍ͤͯͩ͘͞͞
גࣜձࣾϥΫε ΤϯδχΞΛืू͍ͯ͠·͢ ʮླͷൃදΛݟͨʯ ͱ͓͍߹Θ͍ͤͩ͘͞