vote-api/api/dao/Article.go

package dao

import (
	"gorm.io/gorm"
	"gorm.io/gorm/clause"
	"vote-api/api/model"
	"vote-api/api/requests"
	"vote-api/global"
)

type ArticleDao struct {
}

// GetArticleById 获取数据-id
func (r *ArticleDao) GetArticleById(ArticleId int64) (m *model.Article, err error) {
	err = global.Db.First(&m, ArticleId).Error
	if err != nil {
		return nil, err
	}
	return m, nil
}

// GetArticlePreloadById 获取数据-加载全部关联-id
func (r *ArticleDao) GetArticlePreloadById(ArticleId int64) (m *model.Article, err error) {
	err = global.Db.Preload(clause.Associations).First(&m, ArticleId).Error
	if err != nil {
		return nil, err
	}
	return m, nil
}

// DeleteArticle 删除
func (r *ArticleDao) DeleteArticle(tx *gorm.DB, maps interface{}) error {
	err := tx.Where(maps).Delete(&model.Article{}).Error
	if err != nil {
		return err
	}
	return nil
}

// DeleteArticleById 删除-id
func (r *ArticleDao) DeleteArticleById(tx *gorm.DB, ArticleId int64) error {
	if err := tx.Delete(&model.Article{}, ArticleId).Error; err != nil {
		return err
	}
	return nil
}

// EditArticle 修改
func (r *ArticleDao) EditArticle(tx *gorm.DB, maps interface{}, data interface{}) error {
	err := tx.Model(&model.Article{}).Where(maps).Updates(data).Error
	if err != nil {
		return err
	}
	return nil
}

// EditArticleById 修改-id
func (r *ArticleDao) EditArticleById(tx *gorm.DB, ArticleId int64, data interface{}) error {
	err := tx.Model(&model.Article{}).Where("article_id = ?", ArticleId).Updates(data).Error
	if err != nil {
		return err
	}
	return nil
}

// GetArticleList 获取列表
func (r *ArticleDao) GetArticleList(maps interface{}) (m []*model.Article, err error) {
	err = global.Db.Where(maps).Find(&m).Error
	if err != nil {
		return nil, err
	}
	return m, nil
}

// GetArticleCount 获取数量
func (r *ArticleDao) GetArticleCount(maps interface{}) (total int64, err error) {
	err = global.Db.Model(&model.Article{}).Where(maps).Count(&total).Error
	if err != nil {
		return 0, err
	}
	return total, nil
}

// GetArticleListRand 获取列表-随机
func (r *ArticleDao) GetArticleListRand(maps interface{}, limit int) (m []*model.Article, err error) {
	err = global.Db.Where(maps).Order("rand()").Limit(limit).Find(&m).Error
	if err != nil {
		return nil, err
	}
	return m, nil
}

// AddArticle 新增
func (r *ArticleDao) AddArticle(tx *gorm.DB, model *model.Article) (*model.Article, error) {
	if err := tx.Create(model).Error; err != nil {
		return nil, err
	}
	return model, nil
}

// GetArticle 获取
func (r *ArticleDao) GetArticle(maps interface{}) (m *model.Article, err error) {
	err = global.Db.Where(maps).First(&m).Error
	if err != nil {
		return nil, err
	}
	return m, nil
}

// Inc 自增
func (r *ArticleDao) Inc(tx *gorm.DB, ArticleId int64, field string, numeral int) error {
	err := tx.Model(&model.Article{}).Where("article_id = ?", ArticleId).UpdateColumn(field, gorm.Expr(field+" + ?", numeral)).Error
	if err != nil {
		return err
	}
	return nil
}

// Dec 自减
func (r *ArticleDao) Dec(tx *gorm.DB, ArticleId int64, field string, numeral int) error {
	err := tx.Model(&model.Article{}).Where("article_id = ?", ArticleId).UpdateColumn(field, gorm.Expr(field+" - ?", numeral)).Error
	if err != nil {
		return err
	}
	return nil
}

// GetArticlePageSearch 获取图文列表-分页
func (r *ArticleDao) GetArticlePageSearch(req requests.GetArticlePage, page, pageSize int) (m []*model.Article, total int64, err error) {
	var totalRecords int64

	// 构建查询条件
	query := global.Db.Model(&model.Article{})

	// 作者
	query = query.Preload("ArticleAuthor")

	// 作者关联医院
	query = query.Preload("ArticleAuthor.BaseHospital")

	// 文章状态（1:正常 2:禁用）
	query = query.Where("article_status = ?", 1)

	// 搜索关键字
	if req.Keyword != "" {
		keyword := "%" + req.Keyword + "%" //

		// 标题
		orQuery := global.Db.Model(&model.Article{}).Or("article_title LIKE ?", keyword)

		// 编号
		orQuery = orQuery.Or("article_number LIKE ?", keyword)

		// 医院名称
		hospitalSubQuery := global.Db.Model(&model.BaseHospital{}).
			Select("hospital_id").
			Where("hospital_name LIKE ?", keyword)

		articleAuthorSubQuery := global.Db.Model(&model.ArticleAuthor{}).
			Select("article_id").
			Where(gorm.Expr("hospital_id IN (?)", hospitalSubQuery))

		orQuery = orQuery.Or(gorm.Expr("article_id IN (?)", articleAuthorSubQuery))

		// 作者姓名
		subQuery := global.Db.Model(&model.ArticleAuthor{}).
			Select("article_id").
			Where("author_name LIKE ?", keyword)

		orQuery = orQuery.Or(gorm.Expr("article_id IN (?)", subQuery))

		// 执行组建
		query = query.Where(orQuery)
	}

	// 排序
	query = query.Order("created_at asc")

	// 查询总数量
	if err := query.Count(&totalRecords).Error; err != nil {
		return nil, 0, err
	}

	err = query.Scopes(model.Paginate(page, pageSize)).Find(&m).Error
	if err != nil {
		return nil, 0, err
	}
	return m, totalRecords, nil
}

// GetArticleOrderList 获取列表-排序
func (r *ArticleDao) GetArticleOrderList(maps interface{}, orderField string, limit int) (m []*model.Article, err error) {
	err = global.Db.Where(maps).Preload(clause.Associations).Order(orderField).Limit(limit).Find(&m).Error
	if err != nil {
		return nil, err
	}
	return m, nil
}

// GetArticleRankList 获取文章排名列表
func (r *ArticleDao) GetArticleRankList(maps interface{}, orderField string, limit int) (m []*model.Article, err error) {
	err = global.Db.Where(maps).
		Preload("ArticleAuthor").
		Preload("ArticleAuthor.BaseHospital").
		Order(orderField).Limit(limit).Find(&m).Error
	if err != nil {
		return nil, err
	}
	return m, nil
}

// GetArticleRank 获取某一条数据的排名
func (r *ArticleDao) GetArticleRank(articleID int64) (int, error) {
	var rank int

	// 定义子查询
	subQuery := global.Db.Model(&model.Article{}).
		Select("article_id, vote_num, (@rank := @rank + 1) AS rank").
		Where("article_status = ?", 1).
		Order("vote_num DESC").
		Joins(", (SELECT @rank := 0) AS r")

	// 将子查询作为命名子查询的一部分进行查询
	err := global.Db.Table("(?) AS sub", subQuery).
		Where("sub.article_id = ?", articleID).
		Pluck("sub.rank", &rank).Error

	if err != nil {
		return 0, err
	}

	return rank, nil
}