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								package contextx
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								import (
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									"context"
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									"mayfly-go/pkg/model"
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									"mayfly-go/pkg/utils/collx"
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									"mayfly-go/pkg/utils/stringx"
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									"gorm.io/gorm"
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								)
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								type CtxKey string
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								const (
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									LoginAccountKey CtxKey = "loginAccount"
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									TraceIdKey      CtxKey = "traceId"
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									DbKey           CtxKey = "db"
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								)
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								func NewLoginAccount(la *model.LoginAccount) context.Context {
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									return WithLoginAccount(context.Background(), la)
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								}
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								func WithLoginAccount(ctx context.Context, la *model.LoginAccount) context.Context {
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									return context.WithValue(ctx, LoginAccountKey, la)
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								}
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								// 从context中获取登录账号信息,不存在返回nil
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								func GetLoginAccount(ctx context.Context) *model.LoginAccount {
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									if la, ok := ctx.Value(LoginAccountKey).(*model.LoginAccount); ok {
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										return la
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									}
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									return nil
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								}
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								func NewTraceId() context.Context {
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									return WithTraceId(context.Background())
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								}
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								func WithTraceId(ctx context.Context) context.Context {
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									return context.WithValue(ctx, TraceIdKey, stringx.RandByChars(16, stringx.Nums+stringx.LowerChars))
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								}
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								// 从context中获取traceId
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								func GetTraceId(ctx context.Context) string {
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									if val, ok := ctx.Value(TraceIdKey).(string); ok {
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										return val
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									}
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									return ""
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								}
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								// 将事务db放置context中,使用stack保存。以便多个方法调用实现方法内部各自的事务操作
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								func WithDb(ctx context.Context, db *gorm.DB) context.Context {
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									if dbStack, ok := ctx.Value(DbKey).(*collx.Stack[*gorm.DB]); ok {
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										dbStack.Push(db)
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										return ctx
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									}
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									dbStack := new(collx.Stack[*gorm.DB])
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									dbStack.Push(db)
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									return context.WithValue(ctx, DbKey, dbStack)
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								}
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								// 获取当前操作的栈顶事务数据库实例
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								func GetDb(ctx context.Context) *gorm.DB {
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									if dbStack, ok := ctx.Value(DbKey).(*collx.Stack[*gorm.DB]); ok {
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										return dbStack.Top()
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									}
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									return nil
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								}
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								func RmDb(ctx context.Context) *gorm.DB {
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									if dbStack, ok := ctx.Value(DbKey).(*collx.Stack[*gorm.DB]); ok {
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										return dbStack.Pop()
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									}
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									return nil
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								}
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