feat: 추천인을 저장할 엔티티를 추가한다

backend/src/main/kotlin/com/dclass/backend/application/RecommendService.kt

@@ -0,0 +1,16 @@
+package com.dclass.backend.application
+
+import com.dclass.backend.domain.recommend.Recommend
+import com.dclass.backend.domain.recommend.RecommendRepository
+import jakarta.transaction.Transactional
+import org.springframework.stereotype.Service
+
+@Transactional
+@Service
+class RecommendService(
+    private val recommendRepository: RecommendRepository
+) {
+    fun create(userName: String) {
+        recommendRepository.save(Recommend(userName))
+    }
+}

backend/src/main/kotlin/com/dclass/backend/application/dto/RecommendDtos.kt

@@ -0,0 +1,6 @@
+package com.dclass.backend.application.dto
+
+
+data class RecommendRequest(
+    val userName: String,
+)

backend/src/main/kotlin/com/dclass/backend/domain/recommend/Recommend.kt

@@ -0,0 +1,12 @@
+package com.dclass.backend.domain.recommend
+
+import com.dclass.support.domain.BaseEntity
+import jakarta.persistence.Column
+import jakarta.persistence.Entity
+
+@Entity
+class Recommend(
+    @Column(nullable = false)
+    val userName: String,
+    id: Long = 0L,
+) : BaseEntity(id)

backend/src/main/kotlin/com/dclass/backend/domain/recommend/RecommendRepository.kt

@@ -0,0 +1,6 @@
+package com.dclass.backend.domain.recommend
+
+import org.springframework.data.jpa.repository.JpaRepository
+
+interface RecommendRepository : JpaRepository<Recommend, Long>
+

backend/src/main/kotlin/com/dclass/backend/ui/api/RecommendController.kt

@@ -0,0 +1,19 @@
+package com.dclass.backend.ui.api
+
+import com.dclass.backend.application.RecommendService
+import com.dclass.backend.application.dto.RecommendRequest
+import org.springframework.web.bind.annotation.PostMapping
+import org.springframework.web.bind.annotation.RequestBody
+import org.springframework.web.bind.annotation.RequestMapping
+import org.springframework.web.bind.annotation.RestController
+
+@RestController
+@RequestMapping("/api/recommend")
+class RecommendController(
+    private val recommendService: RecommendService,
+) {
+    @PostMapping
+    fun create(@RequestBody request: RecommendRequest) {
+        recommendService.create(request.userName)
+    }
+}

backend/src/main/resources/db/migration/V14__create_recommend_table.sql

@@ -0,0 +1,6 @@
+create table recommend
+(
+    id        bigint       not null auto_increment,
+    user_name varchar(255) not null,
+    primary key (id)
+) engine=InnoDB;