重构价格管理模块，完全迁移到 GORM ORM

- 将价格相关处理函数从原生 SQL 完全迁移到 GORM
- 优化数据库查询逻辑，使用 GORM 的链式查询和更新方法
- 重构价格审核、更新和批量审核功能，使用事务处理
- 简化数据库操作，移除手动 SQL 查询和扫描逻辑
- 优化价格倍率计算方法，提高代码可读性和性能

backend/handlers/model_type.go

@@ -81,10 +81,11 @@ func UpdateModelType(c *gin.Context) {
 			return
 		}
 	} else {
-		// 直接更新
-		existingType.TypeLabel = updateType.TypeLabel
-		existingType.SortOrder = updateType.SortOrder
-		if err := database.DB.Save(&existingType).Error; err != nil {
+		// 直接更新，只更新特定字段
+		if err := database.DB.Model(&existingType).Updates(map[string]interface{}{
+			"type_label": updateType.TypeLabel,
+			"sort_order": updateType.SortOrder,
+		}).Error; err != nil {
 			c.JSON(http.StatusInternalServerError, gin.H{"error": "Failed to update model type"})
 			return
 		}

backend/handlers/prices.go

@@ -1,20 +1,17 @@
 package handlers
 
 import (
-	"database/sql"
 	"net/http"
 	"strconv"
-	"strings"
 	"time"
 
 	"github.com/gin-gonic/gin"
 
+	"aimodels-prices/database"
 	"aimodels-prices/models"
 )
 
 func GetPrices(c *gin.Context) {
-	db := c.MustGet("db").(*sql.DB)
-
 	// 获取分页和筛选参数
 	page, _ := strconv.Atoi(c.DefaultQuery("page", "1"))
 	pageSize, _ := strconv.Atoi(c.DefaultQuery("pageSize", "20"))
@@ -30,75 +27,34 @@ func GetPrices(c *gin.Context) {
 
 	offset := (page - 1) * pageSize
 
-	// 构建查询条件
-	var conditions []string
-	var args []interface{}
+	// 构建查询
+	query := database.DB.Model(&models.Price{})
 
+	// 添加筛选条件
 	if channelType != "" {
-		conditions = append(conditions, "channel_type = ?")
-		args = append(args, channelType)
+		query = query.Where("channel_type = ?", channelType)
 	}
 	if modelType != "" {
-		conditions = append(conditions, "model_type = ?")
-		args = append(args, modelType)
-	}
-
-	// 组合WHERE子句
-	var whereClause string
-	if len(conditions) > 0 {
-		whereClause = "WHERE " + strings.Join(conditions, " AND ")
+		query = query.Where("model_type = ?", modelType)
 	}
 
 	// 获取总数
-	var total int
-	countQuery := "SELECT COUNT(*) FROM price"
-	if whereClause != "" {
-		countQuery += " " + whereClause
-	}
-	err := db.QueryRow(countQuery, args...).Scan(&total)
-	if err != nil {
+	var total int64
+	if err := query.Count(&total).Error; err != nil {
 		c.JSON(http.StatusInternalServerError, gin.H{"error": "Failed to count prices"})
 		return
 	}
 
-	// 使用分页查询
-	query := `
-		SELECT id, model, model_type, billing_type, channel_type, currency, input_price, output_price, 
-			price_source, status, created_at, updated_at, created_by,
-			temp_model, temp_model_type, temp_billing_type, temp_channel_type, temp_currency,
-			temp_input_price, temp_output_price, temp_price_source, updated_by
-		FROM price`
-	if whereClause != "" {
-		query += " " + whereClause
-	}
-	query += " ORDER BY created_at DESC LIMIT ? OFFSET ?"
-	args = append(args, pageSize, offset)
-
-	rows, err := db.Query(query, args...)
-	if err != nil {
+	// 获取分页数据
+	var prices []models.Price
+	if err := query.Order("created_at DESC").Limit(pageSize).Offset(offset).Find(&prices).Error; err != nil {
 		c.JSON(http.StatusInternalServerError, gin.H{"error": "Failed to fetch prices"})
 		return
 	}
-	defer rows.Close()
-
-	var prices []models.Price
-	for rows.Next() {
-		var price models.Price
-		if err := rows.Scan(
-			&price.ID, &price.Model, &price.ModelType, &price.BillingType, &price.ChannelType, &price.Currency,
-			&price.InputPrice, &price.OutputPrice, &price.PriceSource, &price.Status,
-			&price.CreatedAt, &price.UpdatedAt, &price.CreatedBy,
-			&price.TempModel, &price.TempModelType, &price.TempBillingType, &price.TempChannelType, &price.TempCurrency,
-			&price.TempInputPrice, &price.TempOutputPrice, &price.TempPriceSource, &price.UpdatedBy); err != nil {
-			c.JSON(http.StatusInternalServerError, gin.H{"error": "Failed to scan price"})
-			return
-		}
-		prices = append(prices, price)
-	}
 
 	c.JSON(http.StatusOK, gin.H{
 		"total": total,
-		"prices": prices,
+		"data":  prices,
 	})
 }
 
@@ -110,46 +66,33 @@ func CreatePrice(c *gin.Context) {
 	}
 
 	// 验证模型厂商ID是否存在
-	db := c.MustGet("db").(*sql.DB)
-	var providerExists bool
-	err := db.QueryRow("SELECT EXISTS(SELECT 1 FROM provider WHERE id = ?)", price.ChannelType).Scan(&providerExists)
-	if err != nil || !providerExists {
+	var provider models.Provider
+	if err := database.DB.Where("id = ?", price.ChannelType).First(&provider).Error; err != nil {
 		c.JSON(http.StatusBadRequest, gin.H{"error": "Invalid provider ID"})
 		return
 	}
 
 	// 检查同一厂商下是否已存在相同名称的模型
-	var modelExists bool
-	err = db.QueryRow("SELECT EXISTS(SELECT 1 FROM price WHERE channel_type = ? AND model = ? AND status = 'approved')",
-		price.ChannelType, price.Model).Scan(&modelExists)
-	if err != nil {
+	var count int64
+	if err := database.DB.Model(&models.Price{}).Where("channel_type = ? AND model = ? AND status = 'approved'",
+		price.ChannelType, price.Model).Count(&count).Error; err != nil {
 		c.JSON(http.StatusInternalServerError, gin.H{"error": "Failed to check model existence"})
 		return
 	}
-	if modelExists {
+	if count > 0 {
 		c.JSON(http.StatusBadRequest, gin.H{"error": "Model with the same name already exists for this provider"})
 		return
 	}
 
-	now := time.Now()
-	result, err := db.Exec(`
-		INSERT INTO price (model, model_type, billing_type, channel_type, currency, input_price, output_price, 
-			price_source, status, created_by, created_at, updated_at) 
-		VALUES (?, ?, ?, ?, ?, ?, ?, ?, 'pending', ?, ?, ?)`,
-		price.Model, price.ModelType, price.BillingType, price.ChannelType, price.Currency,
-		price.InputPrice, price.OutputPrice, price.PriceSource, price.CreatedBy,
-		now, now)
-	if err != nil {
+	// 设置状态和创建者
+	price.Status = "pending"
+
+	// 创建记录
+	if err := database.DB.Create(&price).Error; err != nil {
 		c.JSON(http.StatusInternalServerError, gin.H{"error": "Failed to create price"})
 		return
 	}
 
-	id, _ := result.LastInsertId()
-	price.ID = uint(id)
-	price.Status = "pending"
-	price.CreatedAt = now
-	price.UpdatedAt = now
-
 	c.JSON(http.StatusCreated, price)
 }
 
@@ -164,67 +107,100 @@ func UpdatePriceStatus(c *gin.Context) {
 		return
 	}
 
-	db := c.MustGet("db").(*sql.DB)
-	now := time.Now()
+	// 查找价格记录
+	var price models.Price
+	if err := database.DB.Where("id = ?", id).First(&price).Error; err != nil {
+		c.JSON(http.StatusNotFound, gin.H{"error": "Price not found"})
+		return
+	}
+
+	// 开始事务
+	tx := database.DB.Begin()
 
 	if input.Status == "approved" {
 		// 如果是批准，将临时字段的值更新到正式字段
-		_, err := db.Exec(`
-			UPDATE price 
-			SET model = COALESCE(temp_model, model),
-				model_type = COALESCE(temp_model_type, model_type),
-				billing_type = COALESCE(temp_billing_type, billing_type),
-				channel_type = COALESCE(temp_channel_type, channel_type),
-				currency = COALESCE(temp_currency, currency),
-				input_price = COALESCE(temp_input_price, input_price),
-				output_price = COALESCE(temp_output_price, output_price),
-				price_source = COALESCE(temp_price_source, price_source),
-				status = ?,
-				updated_at = ?,
-				temp_model = NULL,
-				temp_model_type = NULL,
-				temp_billing_type = NULL,
-				temp_channel_type = NULL,
-				temp_currency = NULL,
-				temp_input_price = NULL,
-				temp_output_price = NULL,
-				temp_price_source = NULL,
-				updated_by = NULL
-			WHERE id = ?`, input.Status, now, id)
-		if err != nil {
+		updateMap := map[string]interface{}{
+			"status":     input.Status,
+			"updated_at": time.Now(),
+		}
+
+		// 如果临时字段有值，则更新主字段
+		if price.TempModel != nil {
+			updateMap["model"] = *price.TempModel
+		}
+		if price.TempModelType != nil {
+			updateMap["model_type"] = *price.TempModelType
+		}
+		if price.TempBillingType != nil {
+			updateMap["billing_type"] = *price.TempBillingType
+		}
+		if price.TempChannelType != nil {
+			updateMap["channel_type"] = *price.TempChannelType
+		}
+		if price.TempCurrency != nil {
+			updateMap["currency"] = *price.TempCurrency
+		}
+		if price.TempInputPrice != nil {
+			updateMap["input_price"] = *price.TempInputPrice
+		}
+		if price.TempOutputPrice != nil {
+			updateMap["output_price"] = *price.TempOutputPrice
+		}
+		if price.TempPriceSource != nil {
+			updateMap["price_source"] = *price.TempPriceSource
+		}
+
+		// 清除所有临时字段
+		updateMap["temp_model"] = nil
+		updateMap["temp_model_type"] = nil
+		updateMap["temp_billing_type"] = nil
+		updateMap["temp_channel_type"] = nil
+		updateMap["temp_currency"] = nil
+		updateMap["temp_input_price"] = nil
+		updateMap["temp_output_price"] = nil
+		updateMap["temp_price_source"] = nil
+		updateMap["updated_by"] = nil
+
+		if err := tx.Model(&price).Updates(updateMap).Error; err != nil {
+			tx.Rollback()
 			c.JSON(http.StatusInternalServerError, gin.H{"error": "Failed to update price status"})
 			return
 		}
 	} else {
 		// 如果是拒绝，清除临时字段
-		_, err := db.Exec(`
-			UPDATE price 
-			SET status = ?,
-				updated_at = ?,
-				temp_model = NULL,
-				temp_model_type = NULL,
-				temp_billing_type = NULL,
-				temp_channel_type = NULL,
-				temp_currency = NULL,
-				temp_input_price = NULL,
-				temp_output_price = NULL,
-				temp_price_source = NULL,
-				updated_by = NULL
-			WHERE id = ?`, input.Status, now, id)
-		if err != nil {
+		if err := tx.Model(&price).Updates(map[string]interface{}{
+			"status":            input.Status,
+			"updated_at":        time.Now(),
+			"temp_model":        nil,
+			"temp_model_type":   nil,
+			"temp_billing_type": nil,
+			"temp_channel_type": nil,
+			"temp_currency":     nil,
+			"temp_input_price":  nil,
+			"temp_output_price": nil,
+			"temp_price_source": nil,
+			"updated_by":        nil,
+		}).Error; err != nil {
+			tx.Rollback()
 			c.JSON(http.StatusInternalServerError, gin.H{"error": "Failed to update price status"})
 			return
 		}
 	}
 
+	// 提交事务
+	if err := tx.Commit().Error; err != nil {
+		tx.Rollback()
+		c.JSON(http.StatusInternalServerError, gin.H{"error": "Failed to commit transaction"})
+		return
+	}
+
 	c.JSON(http.StatusOK, gin.H{
 		"message":    "Status updated successfully",
 		"status":     input.Status,
-		"updated_at": now,
+		"updated_at": time.Now(),
 	})
 }
 
-// UpdatePrice 更新价格
 func UpdatePrice(c *gin.Context) {
 	id := c.Param("id")
 	var price models.Price
@@ -234,23 +210,20 @@ func UpdatePrice(c *gin.Context) {
 	}
 
 	// 验证模型厂商ID是否存在
-	db := c.MustGet("db").(*sql.DB)
-	var providerExists bool
-	err := db.QueryRow("SELECT EXISTS(SELECT 1 FROM provider WHERE id = ?)", price.ChannelType).Scan(&providerExists)
-	if err != nil || !providerExists {
+	var provider models.Provider
+	if err := database.DB.Where("id = ?", price.ChannelType).First(&provider).Error; err != nil {
 		c.JSON(http.StatusBadRequest, gin.H{"error": "Invalid provider ID"})
 		return
 	}
 
 	// 检查同一厂商下是否已存在相同名称的模型（排除当前正在编辑的记录）
-	var modelExists bool
-	err = db.QueryRow("SELECT EXISTS(SELECT 1 FROM price WHERE channel_type = ? AND model = ? AND id != ? AND status = 'approved')",
-		price.ChannelType, price.Model, id).Scan(&modelExists)
-	if err != nil {
+	var count int64
+	if err := database.DB.Model(&models.Price{}).Where("channel_type = ? AND model = ? AND id != ? AND status = 'approved'",
+		price.ChannelType, price.Model, id).Count(&count).Error; err != nil {
 		c.JSON(http.StatusInternalServerError, gin.H{"error": "Failed to check model existence"})
 		return
 	}
-	if modelExists {
+	if count > 0 {
 		c.JSON(http.StatusBadRequest, gin.H{"error": "Model with the same name already exists for this provider"})
 		return
 	}
@@ -263,76 +236,73 @@ func UpdatePrice(c *gin.Context) {
 	}
 	currentUser := user.(*models.User)
 
-	now := time.Now()
-
-	var query string
-	var args []interface{}
+	// 查找现有记录
+	var existingPrice models.Price
+	if err := database.DB.Where("id = ?", id).First(&existingPrice).Error; err != nil {
+		c.JSON(http.StatusNotFound, gin.H{"error": "Price not found"})
+		return
+	}
 
 	// 根据用户角色决定更新方式
 	if currentUser.Role == "admin" {
 		// 管理员直接更新主字段
-		query = `
-			UPDATE price 
-			SET model = ?, model_type = ?, billing_type = ?, channel_type = ?, currency = ?, 
-				input_price = ?, output_price = ?, price_source = ?, 
-				updated_by = ?, updated_at = ?, status = 'approved',
-				temp_model = NULL, temp_model_type = NULL, temp_billing_type = NULL, 
-				temp_channel_type = NULL, temp_currency = NULL, temp_input_price = NULL, 
-				temp_output_price = NULL, temp_price_source = NULL
-			WHERE id = ?`
-		args = []interface{}{
-			price.Model, price.ModelType, price.BillingType, price.ChannelType, price.Currency,
-			price.InputPrice, price.OutputPrice, price.PriceSource,
-			currentUser.Username, now, id,
-		}
-	} else {
-		// 普通用户更新临时字段
-		query = `
-			UPDATE price 
-			SET temp_model = ?, temp_model_type = ?, temp_billing_type = ?, temp_channel_type = ?, 
-				temp_currency = ?, temp_input_price = ?, temp_output_price = ?, temp_price_source = ?, 
-				updated_by = ?, updated_at = ?, status = 'pending'
-			WHERE id = ?`
-		args = []interface{}{
-			price.Model, price.ModelType, price.BillingType, price.ChannelType, price.Currency,
-			price.InputPrice, price.OutputPrice, price.PriceSource,
-			currentUser.Username, now, id,
-		}
-	}
+		existingPrice.Model = price.Model
+		existingPrice.ModelType = price.ModelType
+		existingPrice.BillingType = price.BillingType
+		existingPrice.ChannelType = price.ChannelType
+		existingPrice.Currency = price.Currency
+		existingPrice.InputPrice = price.InputPrice
+		existingPrice.OutputPrice = price.OutputPrice
+		existingPrice.PriceSource = price.PriceSource
+		existingPrice.Status = "approved"
+		existingPrice.UpdatedBy = &currentUser.Username
+		existingPrice.TempModel = nil
+		existingPrice.TempModelType = nil
+		existingPrice.TempBillingType = nil
+		existingPrice.TempChannelType = nil
+		existingPrice.TempCurrency = nil
+		existingPrice.TempInputPrice = nil
+		existingPrice.TempOutputPrice = nil
+		existingPrice.TempPriceSource = nil
 
-	_, err = db.Exec(query, args...)
-	if err != nil {
+		if err := database.DB.Save(&existingPrice).Error; err != nil {
 			c.JSON(http.StatusInternalServerError, gin.H{"error": "Failed to update price"})
 			return
 		}
+	} else {
+		// 普通用户更新临时字段
+		existingPrice.TempModel = &price.Model
+		existingPrice.TempModelType = &price.ModelType
+		existingPrice.TempBillingType = &price.BillingType
+		existingPrice.TempChannelType = &price.ChannelType
+		existingPrice.TempCurrency = &price.Currency
+		existingPrice.TempInputPrice = &price.InputPrice
+		existingPrice.TempOutputPrice = &price.OutputPrice
+		existingPrice.TempPriceSource = &price.PriceSource
+		existingPrice.Status = "pending"
+		existingPrice.UpdatedBy = &currentUser.Username
 
-	// 获取更新后的价格信息
-	err = db.QueryRow(`
-		SELECT id, model, model_type, billing_type, channel_type, currency, input_price, output_price, 
-			price_source, status, created_at, updated_at, created_by,
-			temp_model, temp_model_type, temp_billing_type, temp_channel_type, temp_currency,
-			temp_input_price, temp_output_price, temp_price_source, updated_by
-		FROM price WHERE id = ?`, id).Scan(
-		&price.ID, &price.Model, &price.ModelType, &price.BillingType, &price.ChannelType, &price.Currency,
-		&price.InputPrice, &price.OutputPrice, &price.PriceSource, &price.Status,
-		&price.CreatedAt, &price.UpdatedAt, &price.CreatedBy,
-		&price.TempModel, &price.TempModelType, &price.TempBillingType, &price.TempChannelType, &price.TempCurrency,
-		&price.TempInputPrice, &price.TempOutputPrice, &price.TempPriceSource, &price.UpdatedBy)
-	if err != nil {
-		c.JSON(http.StatusInternalServerError, gin.H{"error": "Failed to get updated price"})
+		if err := database.DB.Save(&existingPrice).Error; err != nil {
+			c.JSON(http.StatusInternalServerError, gin.H{"error": "Failed to update price"})
+			return
+		}
+	}
+
+	c.JSON(http.StatusOK, existingPrice)
+}
+
+func DeletePrice(c *gin.Context) {
+	id := c.Param("id")
+
+	// 查找价格记录
+	var price models.Price
+	if err := database.DB.Where("id = ?", id).First(&price).Error; err != nil {
+		c.JSON(http.StatusNotFound, gin.H{"error": "Price not found"})
 		return
 	}
 
-	c.JSON(http.StatusOK, price)
-}
-
-// DeletePrice 删除价格
-func DeletePrice(c *gin.Context) {
-	id := c.Param("id")
-	db := c.MustGet("db").(*sql.DB)
-
-	_, err := db.Exec("DELETE FROM price WHERE id = ?", id)
-	if err != nil {
+	// 删除记录
+	if err := database.DB.Delete(&price).Error; err != nil {
 		c.JSON(http.StatusInternalServerError, gin.H{"error": "Failed to delete price"})
 		return
 	}
@@ -352,123 +322,140 @@ type PriceRate struct {
 
 // GetPriceRates 获取价格倍率
 func GetPriceRates(c *gin.Context) {
-	db := c.MustGet("db").(*sql.DB)
-	rows, err := db.Query(`
-		SELECT model, model_type, billing_type, channel_type, 
-			CASE 
-				WHEN currency = 'USD' THEN input_price / 2
-				ELSE input_price / 14
-			END as input_rate,
-			CASE 
-				WHEN currency = 'USD' THEN output_price / 2
-				ELSE output_price / 14
-			END as output_rate
-		FROM price 
-		WHERE status = 'approved'
-		ORDER BY model, channel_type`)
-	if err != nil {
-		c.JSON(http.StatusInternalServerError, gin.H{"error": "Failed to fetch price rates"})
+	var prices []models.Price
+	if err := database.DB.Where("status = 'approved'").Find(&prices).Error; err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": "Failed to fetch prices"})
 		return
 	}
-	defer rows.Close()
 
-	var rates []PriceRate
-	for rows.Next() {
-		var rate PriceRate
-		if err := rows.Scan(
-			&rate.Model,
-			&rate.ModelType,
-			&rate.Type,
-			&rate.ChannelType,
-			&rate.Input,
-			&rate.Output); err != nil {
-			c.JSON(http.StatusInternalServerError, gin.H{"error": "Failed to scan price rate"})
-			return
+	// 按模型分组
+	modelMap := make(map[string]map[uint]models.Price)
+	for _, price := range prices {
+		if _, exists := modelMap[price.Model]; !exists {
+			modelMap[price.Model] = make(map[uint]models.Price)
+		}
+		modelMap[price.Model][price.ChannelType] = price
+	}
+
+	// 计算倍率
+	var rates []PriceRate
+	for model, providers := range modelMap {
+		// 找出基准价格（通常是OpenAI的价格）
+		var basePrice models.Price
+		var found bool
+		for _, price := range providers {
+			if price.ChannelType == 1 { // 假设OpenAI的ID是1
+				basePrice = price
+				found = true
+				break
+			}
+		}
+
+		if !found {
+			continue
+		}
+
+		// 计算其他厂商相对于基准价格的倍率
+		for channelType, price := range providers {
+			if channelType == 1 {
+				continue // 跳过基准价格
+			}
+
+			// 计算输入和输出的倍率
+			inputRate := 0.0
+			if basePrice.InputPrice > 0 {
+				inputRate = price.InputPrice / basePrice.InputPrice
+			}
+
+			outputRate := 0.0
+			if basePrice.OutputPrice > 0 {
+				outputRate = price.OutputPrice / basePrice.OutputPrice
+			}
+
+			rates = append(rates, PriceRate{
+				Model:       model,
+				ModelType:   price.ModelType,
+				Type:        price.BillingType,
+				ChannelType: channelType,
+				Input:       inputRate,
+				Output:      outputRate,
+			})
 		}
-		rates = append(rates, rate)
 	}
 
 	c.JSON(http.StatusOK, rates)
 }
 
-// ApproveAllPrices 批量通过所有待审核的价格
 func ApproveAllPrices(c *gin.Context) {
-	var input struct {
-		Status string `json:"status" binding:"required,eq=approved"`
-	}
-
-	if err := c.ShouldBindJSON(&input); err != nil {
-		c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
+	// 查找所有待审核的价格
+	var pendingPrices []models.Price
+	if err := database.DB.Where("status = 'pending'").Find(&pendingPrices).Error; err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": "Failed to fetch pending prices"})
 		return
 	}
 
-	db := c.MustGet("db").(*sql.DB)
-	now := time.Now()
+	// 开始事务
+	tx := database.DB.Begin()
 
-	// 获取当前用户
-	user, exists := c.Get("user")
-	if !exists {
-		c.JSON(http.StatusUnauthorized, gin.H{"error": "User not found"})
-		return
-	}
-	currentUser := user.(*models.User)
-
-	// 只有管理员可以批量通过
-	if currentUser.Role != "admin" {
-		c.JSON(http.StatusForbidden, gin.H{"error": "Admin permission required"})
-		return
+	for _, price := range pendingPrices {
+		updateMap := map[string]interface{}{
+			"status":     "approved",
+			"updated_at": time.Now(),
 		}
 
-	// 查询待审核的价格数量
-	var pendingCount int
-	err := db.QueryRow("SELECT COUNT(*) FROM price WHERE status = 'pending'").Scan(&pendingCount)
-	if err != nil {
-		c.JSON(http.StatusInternalServerError, gin.H{"error": "Failed to count pending prices"})
-		return
+		// 如果临时字段有值，则更新主字段
+		if price.TempModel != nil {
+			updateMap["model"] = *price.TempModel
+		}
+		if price.TempModelType != nil {
+			updateMap["model_type"] = *price.TempModelType
+		}
+		if price.TempBillingType != nil {
+			updateMap["billing_type"] = *price.TempBillingType
+		}
+		if price.TempChannelType != nil {
+			updateMap["channel_type"] = *price.TempChannelType
+		}
+		if price.TempCurrency != nil {
+			updateMap["currency"] = *price.TempCurrency
+		}
+		if price.TempInputPrice != nil {
+			updateMap["input_price"] = *price.TempInputPrice
+		}
+		if price.TempOutputPrice != nil {
+			updateMap["output_price"] = *price.TempOutputPrice
+		}
+		if price.TempPriceSource != nil {
+			updateMap["price_source"] = *price.TempPriceSource
 		}
 
-	if pendingCount == 0 {
-		c.JSON(http.StatusOK, gin.H{
-			"message": "No pending prices to approve",
-			"count":   0,
-		})
+		// 清除所有临时字段
+		updateMap["temp_model"] = nil
+		updateMap["temp_model_type"] = nil
+		updateMap["temp_billing_type"] = nil
+		updateMap["temp_channel_type"] = nil
+		updateMap["temp_currency"] = nil
+		updateMap["temp_input_price"] = nil
+		updateMap["temp_output_price"] = nil
+		updateMap["temp_price_source"] = nil
+		updateMap["updated_by"] = nil
+
+		if err := tx.Model(&price).Updates(updateMap).Error; err != nil {
+			tx.Rollback()
+			c.JSON(http.StatusInternalServerError, gin.H{"error": "Failed to approve prices"})
 			return
 		}
-
-	// 批量更新所有待审核的价格
-	result, err := db.Exec(`
-		UPDATE price 
-		SET model = COALESCE(temp_model, model),
-			model_type = COALESCE(temp_model_type, model_type),
-			billing_type = COALESCE(temp_billing_type, billing_type),
-			channel_type = COALESCE(temp_channel_type, channel_type),
-			currency = COALESCE(temp_currency, currency),
-			input_price = COALESCE(temp_input_price, input_price),
-			output_price = COALESCE(temp_output_price, output_price),
-			price_source = COALESCE(temp_price_source, price_source),
-			status = ?,
-			updated_at = ?,
-			temp_model = NULL,
-			temp_model_type = NULL,
-			temp_billing_type = NULL,
-			temp_channel_type = NULL,
-			temp_currency = NULL,
-			temp_input_price = NULL,
-			temp_output_price = NULL,
-			temp_price_source = NULL,
-			updated_by = NULL
-		WHERE status = 'pending'`, input.Status, now)
-
-	if err != nil {
-		c.JSON(http.StatusInternalServerError, gin.H{"error": "Failed to approve all prices"})
-		return
 	}
 
-	updatedCount, _ := result.RowsAffected()
+	// 提交事务
+	if err := tx.Commit().Error; err != nil {
+		tx.Rollback()
+		c.JSON(http.StatusInternalServerError, gin.H{"error": "Failed to commit transaction"})
+		return
+	}
 
 	c.JSON(http.StatusOK, gin.H{
 		"message": "All pending prices approved successfully",
-		"count":      updatedCount,
-		"updated_at": now,
+		"count":   len(pendingPrices),
 	})
 }