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ϑΝΠϧDB"NeDB" ͷεεϝ 2015.6.26 Isamu Suzuki Rakus co, ltd.

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ླ໦ ༐ • גࣜձࣾϥΫε • ੥ٻॻൃߦαʔϏεΛ։ൃͯ͠·͢ • ࢓ࣄͰ͸JavaʴJavaScriptগ͠ • ϓϥΠϕʔτ͸JavaScriptʹશྗ౤ࢿத • ࠷ۙPythonʹුؾͦ͠͏

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ࠓ೔ͷ͓୊

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Έͳ͞Μ

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ͪΐͬͱͨ͠πʔϧΛ ࡞Δͱ͖Ͱ΋ DB࢖͍͍ͨͳ͊ ͱɺࢥ͏͜ͱ͋Γ·͢ΑͶʁ

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Ͱ΋ ηοτΞοϓ͕

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(‘A`)ŵƃŪƄŞŤ

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ͬͯͳΓ·ͤΜ͔ʁ

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ͦΜͳ͋ͳͨʹ NeDB

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஌ͬͯΔਓ͸ ஌Βͳ͍;Γਪ঑ ! ΋͘͠͸ϐβͲ͏ͧ

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Πϯετʔϧ npm install nedb --save ͍ͭ΋ͷҰߦʂ

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ॳظԽ var NeDB = require(‘nedb'); var db = new NeDB({ filename: 'path/to/datafile' });

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ॳظԽʢෳ਺ϑΝΠϧͷ৔߹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' });

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࢖͍ํ(insert) db.users.insert({name: ‘hoge'}); ! //ෳ਺Ϩίʔυͷૠೖ db.users.insert([ {name: 'foo'}, {name: 'bar'} ]);

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࢖͍ํ(insert) db.users.insert([ {name: 'foo'}, {name: 'bar'} ], function(err, newDoc){ //΄͛΄͛;ʔ͹ʔ });

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࢖͍ํ(find) db.users.find({ name: 'fuga' }, function (err, docs) { // ΄͛;͕;ʔ͹ʔ }); db.users.find({ name: /f*uga/ },//ਖ਼نදݱ function (err, docs) { // ΄͛;͕;ʔ͹ʔ });

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࢖͍ํ(find & sort, skip, limit) db.users.find({ name: 'fuga' }) .sort({name: -1}), //name߱ॱ .skip(1) //1݅໨Λඈ͹ͯ͠ .limit(5) //5݅औಘ .exec(function (err, docs) { // ΄͛;͕;ʔ͹ʔ });

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͓͍ɺͪΐͬͱ଴ͯ

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ͭ·Γ͜͏͍͏͜ͱ͔ʁ ʰզʑ͸mongodbͱಉ͡ ߏจͰ࣮૷Ͱ͖Δ……ʱ

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Exactly ʢͦͷͱ͓ΓͰ͍͟͝·͢ʣ ࡾ෦ऴΘΓ·ͨ͠Ͷ

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࢖͍ํ(update) db.users.update({ name: 'fuga' }, { name: 'fungaar' }, { multi: true }, //ෳ਺ߦߋ৽ function (err, numReplaced) { // ΄͛;͕;ʔ͹ʔ });

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࢖͍ํ(remove) db.users.remove({ name: 'fuga' }, { name: 'fungaar' }, { multi: true }, //ෳ਺ߦ࡟আ function (err, numRemoved) { // ΄͛;͕;ʔ͹ʔ });

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NeDBͷAPI͸ MongoDBͷαϒηοτ

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ͭ·Γ

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NeDBͰ࣮૷͓͚ͯ͠͹ MongoDBʹ ͙͢ҠߦͰ͖Δ

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΋ͪΖΜ express-sessionͷ ηογϣϯετΞʹ΋ connect-nedb-session-two ͱ͍͏Ϟδϡʔϧ͕͋Γ·͢

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݁࿦

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NeDB࢖ͬͯ ্खʹखΛൈ͍ͯ ॻ͖͍ͨ͜ͱ͔Βॻ͜͏ʂ

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࠷ޙʹ એ఻͍ͤͯͩ͘͞͞

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גࣜձࣾϥΫε͸ ΤϯδχΞΛืू͍ͯ͠·͢ ʮླ໦ͷൃදΛݟͨʯ ͱ͓໰͍߹Θ͍ͤͩ͘͞