ファイルDB_NeDB_のススメ.pdf

Transcript

1. ϑΝΠϧDB"NeDB" ͷεεϝ 2015.6.26 Isamu Suzuki Rakus co, ltd.
2. ླ໦ ༐ • גࣜձࣾϥΫε • ੥ٻॻൃߦαʔϏεΛ։ൃͯ͠·͢ • ࢓ࣄͰ͸JavaʴJavaScriptগ͠ • ϓϥΠϕʔτ͸JavaScriptʹશྗ౤ࢿத • ࠷ۙPythonʹුؾͦ͠͏
3. ࠓ೔ͷ͓୊
4. Έͳ͞Μ
5. ͪΐͬͱͨ͠πʔϧΛ ࡞Δͱ͖Ͱ΋ DB࢖͍͍ͨͳ͊ ͱɺࢥ͏͜ͱ͋Γ·͢ΑͶʁ
6. Ͱ΋ ηοτΞοϓ͕
7. (‘A`)ŵƃŪƄŞŤ
8. ͬͯͳΓ·ͤΜ͔ʁ
9. ͦΜͳ͋ͳͨʹ NeDB
10. ஌ͬͯΔਓ͸ ஌Βͳ͍;Γਪ঑ ! ΋͘͠͸ϐβͲ͏ͧ
11. Πϯετʔϧ npm install nedb --save ͍ͭ΋ͷҰߦʂ
12. ॳظԽ var NeDB = require(‘nedb'); var db = new NeDB({ filename: 'path/to/datafile' });
13. 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' });
14. ࢖͍ํ(insert) db.users.insert({name: ‘hoge'}); ! //ෳ਺Ϩίʔυͷૠೖ db.users.insert([ {name: 'foo'}, {name: 'bar'} ]);
15. ࢖͍ํ(insert) db.users.insert([ {name: 'foo'}, {name: 'bar'} ], function(err, newDoc){ //΄͛΄͛;ʔ͹ʔ });
16. ࢖͍ํ(find) db.users.find({ name: 'fuga' }, function (err, docs) { // ΄͛;͕;ʔ͹ʔ }); db.users.find({ name: /f*uga/ },//ਖ਼نදݱ function (err, docs) { // ΄͛;͕;ʔ͹ʔ });
17. ࢖͍ํ(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 });
18. ͓͍ɺͪΐͬͱ଴ͯ
19. ͭ·Γ͜͏͍͏͜ͱ͔ʁ ʰզʑ͸mongodbͱಉ͡ ߏจͰ࣮૷Ͱ͖Δ……ʱ
20. Exactly ʢͦͷͱ͓ΓͰ͍͟͝·͢ʣ ࡾ෦ऴΘΓ·ͨ͠Ͷ
21. ࢖͍ํ(update) db.users.update({ name: 'fuga' }, { name: 'fungaar' }, { multi: true }, //ෳ਺ߦߋ৽ function (err, numReplaced) { // ΄͛;͕;ʔ͹ʔ });
22. ࢖͍ํ(remove) db.users.remove({ name: 'fuga' }, { name: 'fungaar' }, { multi: true }, //ෳ਺ߦ࡟আ function (err, numRemoved) { // ΄͛;͕;ʔ͹ʔ });
23. NeDBͷAPI͸ MongoDBͷαϒηοτ
24. ͭ·Γ
25. NeDBͰ࣮૷͓͚ͯ͠͹ MongoDBʹ ͙͢ҠߦͰ͖Δ
26. ΋ͪΖΜ express-sessionͷ ηογϣϯετΞʹ΋ connect-nedb-session-two ͱ͍͏Ϟδϡʔϧ͕͋Γ·͢
27. ݁࿦
28. NeDB࢖ͬͯ ্खʹखΛൈ͍ͯ ॻ͖͍ͨ͜ͱ͔Βॻ͜͏ʂ
29. ࠷ޙʹ એ఻͍ͤͯͩ͘͞͞
30. גࣜձࣾϥΫε͸ ΤϯδχΞΛืू͍ͯ͠·͢ ʮླ໦ͷൃදΛݟͨʯ ͱ͓໰͍߹Θ͍ͤͩ͘͞