Initial backend repository commit.

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

Made-with: Cursor

internal/model/like.go

@@ -0,0 +1,28 @@
+package model
+
+import (
+	"time"
+
+	"github.com/google/uuid"
+	"gorm.io/gorm"
+)
+
+// PostLike 帖子点赞
+type PostLike struct {
+	ID        string    `json:"id" gorm:"type:varchar(36);primaryKey"`
+	PostID    string    `json:"post_id" gorm:"type:varchar(36);not null;index;uniqueIndex:idx_post_like_user,priority:1"`
+	UserID    string    `json:"user_id" gorm:"type:varchar(36);not null;index;uniqueIndex:idx_post_like_user,priority:2"`
+	CreatedAt time.Time `json:"created_at" gorm:"autoCreateTime"`
+}
+
+// BeforeCreate 创建前生成UUID
+func (pl *PostLike) BeforeCreate(tx *gorm.DB) error {
+	if pl.ID == "" {
+		pl.ID = uuid.New().String()
+	}
+	return nil
+}
+
+func (PostLike) TableName() string {
+	return "post_likes"
+}