implemented post handler

backend/models/post.go

@@ -7,5 +7,4 @@ type Post struct {
 	Title      string `gorm:"not null"`
 	Content    string `gorm:"type:text; not null"`
 	AuthorID   uint   // foreign key to User
-	Author     User   `gorm:"constraint:OnUpdate:CASCADE,OnDelete:SET NULL;"` // optional relation
 }

backend/models/user.go

@@ -3,8 +3,8 @@ package models
 import "gorm.io/gorm"
 
 type User struct {
-	gorm.Model // includes ID, CreatedAt, UpdatedAt, DeletedAt
-	Name       string
+	gorm.Model        // includes ID, CreatedAt, UpdatedAt, DeletedAt
+	Name       string `gorm:"uniqueIndex"`
 	Email      string `gorm:"uniqueIndex"`
 	Password   string
 }