package model import ( "time" ) // RelatedCategory represents a category linked to an article (cross-category). // Reference: P2B M9 spec type RelatedCategory struct { ID uint `gorm:"primaryKey" json:"id"` ArticleID uint `gorm:"not null;index" json:"article_id"` CategoryID uint `gorm:"not null;index" json:"category_id"` CreatedAt time.Time `gorm:"autoCreateTime" json:"created_at"` Article Article `gorm:"foreignKey:ArticleID" json:"article,omitempty"` Category Category `gorm:"foreignKey:CategoryID" json:"category,omitempty"` } func (RelatedCategory) TableName() string { return "related_categories" }