Video: Kuv yuav ua li cas thiaj li nres qhov kev sib txuas Sequelized?
2024 Tus sau: Lynn Donovan | [email protected]. Kawg hloov kho: 2023-12-15 23:47
Kaw tus kev sib txuas
Sequelize yuav khaws cov kev sib txuas qhib los ntawm lub neej ntawd, thiab siv tib yam kev sib txuas rau tag nrho cov lus nug. Yog koj xav tau kaw tus kev sib txuas , hu sequelize . kaw () (uas yog asynchronous thiab rov qab cog lus)
Tsis tas li nug, qhov txiaj ntsig zoo li cas Sequelize muaj?
Hauv paus Sequelize . js muaj kev txhawb nqa zoo rau cov ntaub ntawv synchronization, mob siab rau kev thauj khoom, koom haum, kev hloov pauv thiab tsiv teb tsaws. Lwm lub ntsiab qhov zoo ntawm Sequelize . js yog nws yooj yim mus kuaj.
Ib yam li ntawd, kuv yuav ua li cas thiaj tsim tau Sequelized database? Nco ntsoov tias koj tau khiav npm nruab -g sequelize-cli !
- cd rau hauv ib daim ntawv teev npe nrog Express app.
- Khiav npm nruab sequelize pg --save.
- Khiav sequelize init.
- Kho kom raug config/config.
- Tsim cov ntaub ntawv kev loj hlob siv createdb ntawm kab hais kom ua.
- Khiav sequelize db: tsiv teb tsaws los kuaj koj qhov kev sib txuas.
Tib neeg kuj nug, Sequelize sync ua dab tsi?
sequelize . synchronization () yuav tsim tag nrho cov ntxhuav hauv cov ntaub ntawv teev tseg. Yog tias koj dhau {force: tseeb} raws li qhov ntsuas rau synchronization method, nws yuav tshem cov ntxhuav ntawm txhua qhov pib thiab tsim cov tshiab. Needless hais, qhov no yog ib qho kev xaiv siv tau tsuas yog rau kev txhim kho.
Sequelize qauv yog dab tsi?
A sequelize qauv sawv cev ib lub rooj nyob rau hauv lub database. Piv txwv ntawm chav kawm no sawv cev ib kab database. Yog tias koj tsis paub nrog cov ntaub ntawv sib txuas xws li SQL, xav tias excel. Ib qho kev sib raug zoo database yog ib lub rooj ntawm kab thiab kab. Sequalize pab tswj lub rooj, muab synchronization, koom haum, validation.
Pom zoo:
Yuav ua li cas kuv thiaj li nres qhov chaw nres nkoj khiav ntawm lub server?
Kev daws Qhib CMD qhov rai hauv Administrator hom los ntawm kev mus rau Pib> Khiav> hom cmd> right-click Command Prompt, tom qab ntawd xaiv Khiav raws li tus thawj coj. Siv cov lus txib netstat sau tag nrho cov chaw nres nkoj nquag. Txhawm rau tua cov txheej txheem no (tus /f yog quab yuam): taskkill /pid 18264 /f
Dab tsi yog qhov sib txawv ntawm kev sib txuas lus taw qhia thiab kev sib txuas tsis raug cai?
Qhov txawv: Kev sib txuas lus taw qhia thiab kev sib txuas tsis muaj kev sib txuas Kev sib txuas lus taw qhia kev sib txuas ua rau muaj kev sib txuas thiab xyuas seb cov lus puas tau txais lossis tsis tau thiab xa rov qab yog tias muaj qhov yuam kev tshwm sim, thaum qhov kev pabcuam tsis sib txuas tsis tau lees tias xa xov
Kuv yuav ua li cas thiaj li nres qhov kev sib hloov screen?
Txhawm rau qhib nws, nyem lub cim ceeb toom ntawm lub taskbarat hauv qab sab xis ntawm koj lub vijtsam, lossis nias Windows + A. Nyem los yog coj mus rhaub cov pobzeb "RotationLock" nyob hauv qab ntawm Action Center pane toenable Rotation Lock
Kuv yuav ua li cas thiaj tsim tau qhov kev sib txuas database hauv lub caij nplooj ntoos hlav?
Txhawm rau nkag mus rau Relational Database los ntawm kev siv JdbcTemplate hauv Spring Boot daim ntawv thov, peb yuav tsum ntxiv Spring Boot Starter JDBC nyob ntawm peb cov ntaub ntawv tsim. Tom qab ntawd, yog tias koj @Autowired chav kawm JdbcTemplate, Caij nplooj ntoos hlav khau raj cia li txuas rau Database thiab teeb tsa Datasource rau JdbcTemplate khoom
Dab tsi yog qhov sib txawv tseem ceeb ntawm kev sib txuas lus tsis sib xws thiab kev sib txuas lus taw qhia?
1. Hauv kev sib txuas lus tsis muaj kev sib txuas lus tsis tas yuav tsim kev sib txuas ntawm qhov chaw (sender) thiab qhov chaw (receiver). Tab sis nyob rau hauv kev sib txuas-taw qhia kev sib txuas lus kev sib txuas lus yuav tsum tau tsim ua ntej hloov cov ntaub ntawv