Video: ORM yog dab tsi hauv Symfony?
2024 Tus sau: Lynn Donovan | [email protected]. Kawg hloov kho: 2023-12-15 23:47
Software Hom: Object-relational mapping
Tib neeg kuj nug tias, Lus Qhuab Qhia hauv Symfony yog dab tsi?
Lus qhuab qhia yog lig decoupled los ntawm Symfony thiab siv nws yog xaiv tau. Tshooj no yog txhua yam hais txog lub Lus qhuab qhia ORM, uas lub hom phiaj cia koj daim ntawv qhia cov khoom rau cov ntaub ntawv sib raug zoo (xws li MySQL, PostgreSQL lossis Microsoft SQL). Koj tuaj yeem txuas ntxiv cov ntaub ntawv rau MongoDB siv Lus qhuab qhia ODM tsev qiv ntawv.
Tsis tas li ntawd, cov lus qhuab qhia database yog dab tsi? Cov Lus qhuab qhia Qhov project (los yog Lus qhuab qhia ) yog ib txheej ntawm PHP cov tsev qiv ntawv feem ntau tsom rau kev muab cov kev pabcuam persistence thiab muaj feem xyuam rau kev ua haujlwm. Nws cov khoom plig khoom plig yog cov khoom siv sib txuas lus (ORM) thiab cov database abstraction txheej nws yog ua rau saum.
Ib yam li ntawd, ORM lub moj khaum yog dab tsi?
ORM tseem yog lwm nerd-acronym, nws luv luv rau Object Relational Mapping. Nyob rau hauv ib tug nutshell, ib ORM txoj haujlwm yog sau rau hauv ib hom lus taw qhia (xws li PHP, Java, C# thiab lwm yam …) thiab nws yog tsim los kom zoo qhwv ib ncig ntawm cov ntaub ntawv sib raug zoo.
Cov lus qhuab qhia DBAL yog dab tsi?
Cov Lus qhuab qhia Database Abstraction Layer ( DBAL ) yog txheej txheej abstraction uas zaum saum PDO thiab muaj qhov nkag siab zoo thiab hloov pauv API rau kev sib txuas lus nrog cov ntaub ntawv sib raug zoo tshaj plaws.
Pom zoo:
ORM sawv cev rau dab tsi hauv hl7?
Order Entry (ORM) cov lus yog ib qho ntawm feem ntau siv HL7 hom lus. ORM cov lus muaj cov ntaub ntawv hais txog kev txiav txim. Qhov no suav nrog kev tso cov xaj xaj tshiab, tshem tawm cov xaj uas twb muaj lawm, txiav tawm, tuav, thiab lwm yam
Yuav ua li cas yog ib tug txheej txheem nyob rau hauv lub operating system dab tsi yog ib tug xov nyob rau hauv lub operating system?
Ib tug txheej txheem, nyob rau hauv cov nqe lus yooj yim tshaj, yog ib tug executingprogram. Ib tug los yog ntau tshaj threads khiav nyob rau hauv cov ntsiab lus ntawm cov txheej txheem. Ib tug xov yog ib qho tseem ceeb chav tsev uas theoperating system faib lub sij hawm processor. Lub threadpool feem ntau yog siv los txo tus naj npawb ntawm cov ntaub ntawv thov thiab muab kev tswj hwm ntawm cov neeg ua haujlwm threads
Dab tsi yog txoj hauv kev virtual thiab txoj hauv lub cev hauv asp net?
Ua ntej tshaj, cia peb tau txais cov ntsiab lus ntawm ob qho tib si. Txoj kev lub cev - Qhov no yog txoj hauv kev tiag tiag cov ntaub ntawv nyob ntawm IIS. Txoj kev Virtual - Qhov no yog txoj hauv kev kom nkag mus rau cov ntaub ntawv uas tau taw qhia los ntawm sab nraud ntawm IIS daim ntawv thov folder
Lus Qhuab Qhia hauv Symfony yog dab tsi?
Cov lus qhuab qhia yog tag nrho decoupled los ntawm Symfony thiab siv nws yog xaiv tau. Tshooj lus no yog txhua yam hais txog Cov Lus Qhuab Qhia ORM, uas yog lub hom phiaj cia koj qhia cov khoom rau cov ntaub ntawv sib raug zoo (xws li MySQL, PostgreSQL lossis Microsoft SQL). Koj tuaj yeem txuas ntxiv cov ntaub ntawv mus rau MongoDB siv Doctrine ODM lub tsev qiv ntawv
Dab tsi yog qhov tsis muaj dab tsi hauv Java?
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