protected ShardingDbContext(ContextScope scope, DbTransactionContext dbTran) : base(dbTran.Connection)
{
Scope = scope;
UseTransaction(dbTran); //设置Scope后才可调用
CheckTableCreate(dbTran.ConnectionString);
}
/// <summary>
/// 创建事务中的Db，执行后Db会被释放（用了using）
/// </summary>
public TRes InTran <TRes>(long id, DbTransactionContext tran, Func <T, TRes> operateFunc)
{
if (_dbConfig.DbConstructor.NewDbInTran == null)
{
throw new Exception($"{typeof(T).Name}没有定义带事务参数的构造函数，请在RegDb方法中添加设置。");
}
using var db = _dbConfig.DbConstructor.NewDbInTran(Scope(DataIdBuilder.ParseDate(id)), tran);
return(operateFunc(db));
}
internal void UseTransaction(DbTransactionContext tran)
{
Database.UseTransaction(tran.Transaction.GetDbTransaction());
}
/// <summary>
/// ShardingDb不能直接调用，构造时Scope为空，DynamicModelCacheKeyFactory会报错。
/// </summary>
protected BaseDbContext(DbTransactionContext dbTran) : base(GetDbOpts(dbTran.Connection))
{
UseTransaction(dbTran);
}