ๆฌๅฝ๏ผใณใใชใณใจในใใชใณใฐใใผใใงๅณๆธ้คจใขใใชใฑใผใทใงใณใ้็บใใ๏ผJavaใใญใธใงใฏใใชใใกใฏใฟใชใณใฐ๏ผ
Java + Spring BootใงไฝๆใใใWebใขใใชใฑใผใทใงใณใKotlin + Spring Bootใซใชใใกใฏใฟใชใณใฐใใ่ฟฝๅ ใฎ่ฆไปถใๅฎ่ฃ ใใพใใใใฎ้็จใง Junit5ใSQLใJPAใQuerydsl ใไฝฟ็จใใใ ใใงใชใใ่จญ่จใจๅฎ่ฃ ใฎ่ฆณ็นใใใใพใใพใชๆนๆณใฎ้ทๆใจ็ญๆใๆฑใใใจใซใชใใพใใ
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1 ไปถ
- ใใใซใกใฏ๏ผ Kotlin + JPAใไธ็ทใซไฝฟ็จใใ้ใฎๆณจๆ็นใ่ฟฝๅ ใงๅ ฑๆใใพใ๏ผ
ใใใซใกใฏ๏ผ KotlinใจJPAใไฝต็จใใ้ใซใฏใใใใซ่ๆ ฎใใๅ ๅฎนใใใใพใใใ
ใใฎๅ ๅฎนใฏใใพใใซbuild.gradleใซไปฅไธใฎใใใชในใฏใชใใใ่ฟฝๅ ใใชใใใฐใชใใชใใจใใ็นใงใ๏ผ
plugins { id "org.jetbrains.kotlin.plugin.allopen" version "1.6.21" } // plugins, dependencies์ ๊ฐ์ Level (์ฆ build.gradle ์ต์๋จ) allOpen { annotation("javax.persistence.Entity") annotation("javax.persistence.MappedSuperclass") annotation("javax.persistence.Embeddable") }ใใฎ็็ฑใฏๆฌกใฎใจใใใงใ๏ผ
ใๅญ็ฅใฎใใใซใKotlinใฏๅบๆฌ็ใซClassใfinalใ้ขๆฐใfinalใงใ๏ผ
ใใใใJPAใไฝฟ็จใใใจใใซProxy Lazy Fetchingใๅฎๅ จใซๅฉ็จใใใซใฏ๏ผ27่ฌ็พฉใงLazy Fetchingใซใคใใฆใฎ่ฉฑใใใใพใ๏ผ๏ผใฏใฉในใ็ถๆฟๅฏ่ฝใงใชใใใฐใชใใพใใ๏ผ็งใ็ขบ่ชใใใจใใใ@OneToManyใงใฏLazy Fetchingใๅไฝใใพใใใ@ManyToOneใซๅฏพใใฆใฏLazy Fetchingใชใใทใงใณใๆ็คบ็ใซไธใใฆใๅไฝใใพใใใงใใใ
ใใฎใใใall-openๆฉ่ฝใไฝฟ็จใใใจใ@EntityใฏใฉในใฏDecompileใ่กใฃใใจใใclassใ้ใใฆใใใใใซๅฆ็ใใชใใใฐใชใใใไธ่จใฎในใฏใชใใใใใฎใใใชๅฝนๅฒใๆใใใใใซใชใใพใใ
ใใฎ่ฌ็พฉใงใฏ@ManyToOne Lazy Fetchingใไฝฟ็จใใฆใใชใใฎใงใๅฏพๅฟใใใใฉใฐใคใณใฏ่ฌ็พฉใง่จๅใใใฆใใพใใใงใใใ ๅใใงใ๏ผ
๏ผๅใๅ ๅฎนใฎๆ็ซ ใฏ๏ผ14ๅผทใKotlinใจJPAใไธ็ทใซไฝฟใๆใฎ่ฉฑใฎ3้ใ๏ผใซใใขใใใญใผใใใใพใใ๏ผ๏ผ
