restructure area

internal/domain/main-entities/postal-code/base/entity.go

@@ -0,0 +1,7 @@
+package base
+
+type Basic struct {
+	Id           uint32 `json:"id" gorm:"primaryKey"`
+	Village_Code string `json:"village_code" gorm:"size:10"`
+	Code         string `json:"code" gorm:"unique;size:5"`
+}

internal/domain/main-entities/postal-code/entity.go

@@ -1,7 +1,11 @@
 package postalcode
 
+import (
+	ep "simrs-vx/internal/domain/main-entities/postal-code/base"
+	ev "simrs-vx/internal/domain/main-entities/village"
+)
+
 type PostalCode struct {
-	Id           uint32 `json:"id" gorm:"primaryKey"`
-	Code         string `json:"code" gorm:"unique;size:5"`
-	Village_Code string `json:"village_code" gorm:"size:10"`
+	ep.Basic
+	Village *ev.Village `json:"village,omitempty" gorm:"foreignKey:Village_Code;references:Code"`
 }