Initial backend repository commit.

Set up project files and add .gitignore to exclude local build/runtime artifacts.

Made-with: Cursor

internal/model/follow.go

@@ -0,0 +1,28 @@
+package model
+
+import (
+	"time"
+
+	"github.com/google/uuid"
+	"gorm.io/gorm"
+)
+
+// Follow 关注关系
+type Follow struct {
+	ID          string    `json:"id" gorm:"type:varchar(36);primaryKey"`
+	FollowerID  string    `json:"follower_id" gorm:"type:varchar(36);index;not null;uniqueIndex:idx_follower_following"`  // 关注者
+	FollowingID string    `json:"following_id" gorm:"type:varchar(36);index;not null;uniqueIndex:idx_follower_following"` // 被关注者
+	CreatedAt   time.Time `json:"created_at" gorm:"autoCreateTime"`
+}
+
+// BeforeCreate 创建前生成UUID
+func (f *Follow) BeforeCreate(tx *gorm.DB) error {
+	if f.ID == "" {
+		f.ID = uuid.New().String()
+	}
+	return nil
+}
+
+func (Follow) TableName() string {
+	return "follows"
+}