feat():learning后台管理项目初始化

internal/models/balance_operation_log.go

@@ -0,0 +1,28 @@
+package models
+
+import "time"
+
+// 操作类型常量
+const (
+	OperationTypeAdd    = "add"
+	OperationTypeDeduct = "deduct"
+)
+
+// BalanceOperationLog 余额操作日志
+type BalanceOperationLog struct {
+	ID            uint      `json:"id" gorm:"primaryKey;autoIncrement;comment:主键ID"`
+	UserID        int       `json:"user_id" gorm:"not null;index:idx_user_id;comment:GoalfyMax用户ID"`
+	OperationType string    `json:"operation_type" gorm:"type:varchar(10);not null;comment:操作类型:add/deduct"`
+	Amount        float64   `json:"amount" gorm:"type:decimal(15,2);not null;comment:操作金额(美元)"`
+	BalanceBefore float64   `json:"balance_before" gorm:"type:decimal(15,2);not null;comment:操作前余额(美元)"`
+	BalanceAfter  float64   `json:"balance_after" gorm:"type:decimal(15,2);not null;comment:操作后余额(美元)"`
+	OperatorID    int       `json:"operator_id" gorm:"not null;index:idx_operator_id;comment:操作者ID"`
+	OperatorName  string    `json:"operator_name" gorm:"type:varchar(50);comment:操作者名称"`
+	Remark        string    `json:"remark" gorm:"type:varchar(255);comment:备注"`
+	CreatedAt     time.Time `json:"created_at" gorm:"not null;index:idx_created_at;comment:创建时间"`
+	UpdatedAt     time.Time `json:"updated_at" gorm:"not null;comment:更新时间"`
+}
+
+func (BalanceOperationLog) TableName() string {
+	return "balance_operation_logs"
+}