Tswv yim thiab Tricks rau MongoDB tsim tawm
Txheej txheem cej luam
Tshwj xeeb no yog muab kev koom tes rau hauv kev sib sab laj 15 lub tswv yim zoo thiab tricks rau lub MongoDB developers. Vam tias lub tswv yim nram no yuav pab kom koj nkag siab thiab ua raws li nyob rau hauv koj qhov project.
Ntsis 1: Theej tawm cov ntaub ntawv rau kev ceev, Hais txog Cov Ntaub Ntawv Rau Lub Sam Xeeb
Cov ntaub ntawv uas tshwj xeeb tshaj yog siv los ntawm ntau cov ntaub ntawv yuav xws li siv (ib txwm) embedded (ncauj lus). Dua, Tus de-normalization yog feem ntau xav zoo tshaj li qub thiab vice versa thiab thiaj li, neb nyias muaj nyias trade-offs thiab thiaj li, Koj yuav xaiv tau yooj yim xaiv seb puas yuav xaiv qhov zoo tshaj rau koj daim ntawv thov.
Ntsis 2: Normalize Nyob rau hauv rooj plaub uas koj yuav tsum tau yav tom ntej profof Ntaub ntawv
Koj cov ntaub ntawv mas yav tom ntej nrog kev pab los ntawm tej ntaub ntawv. Li ntawd, txawv tebchaws, Koj yuav siv cov ntaub ntawv rau ntau ntau cov ntaub ntawv uas yuav nug tau cov ntaub ntawv nyob rau hauv ntau txoj kev txawv yav tom ntej. Daim ntawv thov kev pab no yuav pab tau koj tias koj muaj ib co ntaub ntawv uas koj tau ua ntawv thov tom qab koj tau siv rau xyoo thiab xyoo.
Ntsis 3: Sim Nqa tej ntaub ntawv hauv ib nkaus xwb
Rau qee yam ntawm daim ntawv thov kev pab, mas thoob plaws hauv ntuj, Daim ntawv thov daim ntawv thov no xam tias yog ib lub sij hawm luv. Tej zaum koj yuav xav tias ib tug neeg ua ntaub ntawv thov kom muaj kev thov backend hauv rooj plaub uas koj muaj mobile los yog web site. Ib co piv txwv tseem ceeb yog muaj xws li:
- Qhov no tej zaum yuav yog ib tug neeg siv kev sib tshuam rau ib daim ntawv thov desktop.
- Tseem, Qhov no tej zaum yuav yog ib tug graph loaded rau analytics lawv.
Ntsis 4: Embed Dependent teb
Koj yuav tau thov nug koj tus kheej thaum lub sij hawm uas xaiv seb koj puas xaiv ib qho ntaubntawv tham. Cov ntaub ntawv no koj yuav raug nplua rau hauv daim ntawv no los ntawm nws tus kheej lossis tsuas yog nyob rau hauv cov ntaub ntawv uas loj tshaj plaws. Li ntawd, Nws tseem ceeb heev uas yuav tau embed cov ntaub ntawv nyob rau hauv cov ntaub ntawv nyob rau hauv ib qho ntaub ntawv teev txog tej ntaub ntawv.
Ntsis 5: Embed point-in-time ntaub ntawv
Embedding ntawm cov ntaub ntawv-rau-lub sij hawm cov ntaub ntawv yog qhov tseem ceeb heev. Hauv no xav txog, Koj tsis tau xav kom cov lus qhia nyob rau hauv tej qhov kev txiav txim yuav hloov cov ntaub ntawv uas tau txais ib tug tshiab thumbnail tshiab los yog mus rau ntawm kev muag khoom. Li ntawd, Feem ntau embedding yog ib qho tseem ceeb heev rau cov ntaub ntawv no li qhov uas nws tseem ceeb heev rau snapshot cov ntaub ntawv ntawm ib lub sij hawm tshwj xeeb.
Ntsis 6: Tsis txhob Embedding teb uas muaj Unbound kev loj hlob
Nws yog ib qho tseem ceeb heev uas tsis txhob embedding ntawm lub teb uas muaj unbound kev loj hlob. Vim hais tias cov kev uas cov ntaub ntawv yog muab los ntawm MongoDB, Yog xav kom tau inefficient kom tau appending cov ntaub ntawv xaus rau thaum xaus rau ib array.
Ntsis 7: Cov neeg nyob ua ntej ntawm txhua yam uas koj yuav ua tau
Nws yog xav ntau npaum li cas los nyiam koj cov ntaub ntawv nyob rau hauv cov ntaub ntawv koj paub tias koj daim ntawv yuav tsum tau nyob rau hauv tej teb yav tom ntej. Ua li no thaum twg koj xub insert nws tshaj los ua teb raws li koj mus.
Ntsis 8: Preallocation of The Space thaum twg los tau
Qhov twg los tau, Tseem ceeb heev uas yuav tau xav txog qhov chaw ntawm qhov chaw. Nws feem ntau yog ib qho uas koj paub tias koj cov ntaub ntawv feem ntau yuav loj hlob mus rau ib yam me me. Tab sis npog, Lawv mas pib ntawm lub me me.
Ntsis 9: Cia of The Embedded Cov lus qhia nyob rau Arrays rau the Anonymous Access
Ib lo lus nug uas feem ntau los txog seb nws yuav tsum tau embed cov ntaub ntawv nyob rau hauv ib qho array los yog ib daim ntawv qhia txog cov ntaub ntawv sub-document. Tam sim no, Cov ntaub ntawv no mas siv thaum koj yuav paub raws nraim li cas koj yuav nug seb koj yuav nug dab tsi.
Ntsis 10: Designing of The Documents kom tau nws tus kheej txaus
MongoDB yeej yuav tsum tau ib lub pob tseg thiab cov ntaub ntawv loj loj. Li ntawd, Nws cia li retrieves thiab khw muag khoom noj uas yuav luag tsis muaj txoj kev.
Ntsis 11: Kev nyab xeeb ntawm $-Operators rau lub JavaScript
Feem ntau, Muaj ntau yam haujlwm uas tsis tau ua nrog qhov kev pab los ntawm $-tswv. Cov complexities ntawm lub queries uas koj yuav tsum tau siv los ua ib daim ntawv txaus self-sufficient rau cov ntaub ntawv tshaj plaws.
Ntsis 12: Kev Sib Txuas Lus Raws Li Koj mus
Nws yog ib qho tseem ceeb heev uas yuav tsum tau sib law liag thaum lub sij hawm uas muaj kev pab $ thaum twg los tau.
Ntsis 13: Sau ntawv ntawm qhov chaws uas pab kov tej teeb meem txog cov ntaub ntawv hais txog kev ntseeg
Koj yuav tau khaws koj cov ntaub ntawv uas zoo ib yam hauv koj daim ntawv thov kev pab kom zoo dua qub thiab kuj schema-less ntawm MongoDB.
Ntsis 14: Siv Txoj Kev Txheeb Xyuas Types
Feem ntau, Nyob rau theem ntawm cov ntaub ntawv uas siv cov ntaub ntawv yog yuav ua rau koj lub neej yooj yim npaum li cas.
Ntsis 15: Overriding _id thaum koj possesses koj tus kheej yooj yim thiab Unique Id
Koj yuav tsum tau mus tom ntej thiab ces siv lub default ObjectId rau _ids koj cov ntaub ntawv nyob rau hauv koj cov ntaub ntawv tsis muaj tshwm sim thaum nws nyob teb.
Xaus
Li ntawd, nws yog cleared los saum toj no, Saum toj no muab mas yog qhov zoo tshaj plaws thiab tricks rau lub MongoDB tsim tawm uas yuav tsum tau paub tias.
