OrmLite拋出供給命令

我使用ServiceStack.OrmLite v4.0.62（最後一個的.NET Framework 4.0）未知錯誤的參數不足。我使用SQLite數據庫。所以，在我的UI我有一個包含搜索字段的形式。並根據所設定的條件，我動態生成Expression<Func<T, bool>>。然後我的功能有以下看法：OrmLite拋出供給命令

/// <summary> 
/// Gets the number of records in table corresponding the specified criteria 
/// </summary> 
/// <param name="predicate">Search criteria</param> 
/// <returns></returns> 
public virtual long CountByCondition(Expression<Func<T, bool>> predicate) 
{ 
    // bug: OrmLite !string.IsNullOrWhiteSpace(someStringValue) function causes error while building predicate 

    var q = Db.Connection.From<T>(); 
    q = q.Where(predicate); 
    string cnt = q.ToCountStatement(); 
    // here we have an Exception 
    return Db.Connection.Scalar<long>(cnt, q.Params); 
    //return Db.Connection.Count<T>(predicate); 
}

該錯誤行是我知道（和OrmLite開發人員），它不涉及到當前的問題。例如，q.Params包含「@0」到「@10」 11個參數與名稱。但讓已經產生了腕錶在SQL：

SELECT COUNT(*) 
FROM "Person" 
WHERE ("IsTer" = @0) AND 
     upper("Pib") like @1 AND 
     "Id" IN (SELECT DISTINCT "PersonId" 
       FROM "Predmet" 
       WHERE ("PType" = @2 AND 
         (upper("PValue") like @3 OR upper("PValue") like @4 OR upper("PValue") like @5 OR upper("PValue") like @6 OR upper("PValue") like @7 OR upper("PValue") like @8)) AND 
         ("PType" = @9 AND upper("PValue") like @30)

你看到有在參數名稱有些不吻合是最後一個參數名稱是「@30」！我想這就是爲什麼命令拋出這裏的例外是完整的堆棧的原因：

"unknown error Insufficient parameters supplied to the command"; 
"System.Data.SQLite.SQLiteException";" 
    в System.Data.SQLite.SQLiteStatement.BindParameter(Int32 index, SQLiteParameter param) 
    в System.Data.SQLite.SQLiteStatement.BindParameters() 
    в System.Data.SQLite.SQLiteCommand.BuildNextCommand() 
    в System.Data.SQLite.SQLiteCommand.GetStatement(Int32 index) 
    в System.Data.SQLite.SQLiteDataReader.NextResult() 
    в System.Data.SQLite.SQLiteDataReader..ctor(SQLiteCommand cmd, CommandBehavior behave) 
    в System.Data.SQLite.SQLiteCommand.ExecuteReader(CommandBehavior behavior) 
    в System.Data.SQLite.SQLiteCommand.ExecuteDbDataReader(CommandBehavior behavior) 
    в ServiceStack.OrmLite.OrmLiteCommand.ExecuteReader() 
    в ServiceStack.OrmLite.OrmLiteReadCommandExtensions.ExecReader(IDbCommand dbCmd, String sql) 
    в ServiceStack.OrmLite.OrmLiteResultsFilterExtensions.Scalar[T](IDbCommand dbCmd, String sql) 
    в ServiceStack.OrmLite.OrmLiteResultsFilterExtensions.Scalar[T](IDbCommand dbCmd, String sql, IEnumerable`1 sqlParams) 
    в ServiceStack.OrmLite.OrmLiteReadApi.<>c__DisplayClass3f`1.<Scalar>b__3e(IDbCommand dbCmd) 
    в ServiceStack.OrmLite.OrmLiteExecFilter.Exec[T](IDbConnection dbConn, Func`2 filter) 
    в ServiceStack.OrmLite.OrmLiteReadExpressionsApi.Exec[T](IDbConnection dbConn, Func`2 filter) 
    в ServiceStack.OrmLite.OrmLiteReadApi.Scalar[T](IDbConnection dbConn, String sql, IEnumerable`1 sqlParams) 
    в Reestr.DAL.Repositories.Repository`1.CountByCondition(Expression`1 predicate) в d:\Project\Reestr\Reestr.DAL\Repositories\Repository.cs:строка 113 
    в Reestr.DAL.Repositories.PersonRepository.CountByCondition(Expression`1 predicate) в d:\Project\Reestr\Reestr.DAL\Repositories\PersonRepository.cs:строка 47 
    в Reestr.BLL.Services.PersonService.GetDataBy(Expression`1 predicate, Int32 pageNumber, Int32 pageSize) в d:\Project\Reestr\Reestr.BLL\Services\PersonService.cs:строка 202 
    в Reestr.WinForms.Views.FrmMain.BindGrid(Int32 pageIndex, Expression`1 predicate, SortInfo`1 sortInfo) в d:\Project\Reestr\Reestr.WinForms\Views\FrmMain.cs:строка 427"

所以，請能yopu幫我解決這個問題或解釋爲什麼會這樣？我需要手動更改生成的SQL嗎？我認爲這是不是解決當前問題的很好的選擇。

修訂

今天我試圖產生另一次搜索表達，這裏是OrmLite產生了SQL：

SELECT COUNT(*) 
FROM "Person" 
WHERE ("IsTer" = @0 OR "IsTax" = @1) AND 
     upper("Pib") like @2 AND 
     "Bd" > @3 AND 
     upper("Inn") like @4 AND 
     upper("Bp") like @5 AND 
     upper("Lp") like @6 AND 
     upper("Doc") like @7 AND 
     upper("Gr") like @8 AND 
     upper("Org") like @9 AND 
     upper("Pseudo") like @10 AND 
     "Id" IN (SELECT DISTINCT "PersonId" 
       FROM "Predmet" 
       WHERE ("PType" = @11 AND 
        (upper("PValue") like @12 OR upper("PValue") like @123 OR upper("PValue") like @124 OR upper("PValue") like @125 OR upper("PValue") like @126)) AND 
        ("PType" = @127 AND upper("PValue") like @128) AND 
        ("PType" = @129 AND upper("PValue") like @1230) AND 
        ("PType" = @1231 AND upper("PValue") like @1232 escape '^') AND 
        ("PType" = @1233 AND upper("PValue") like @1234) AND 
        ("PType" = @1235 AND upper("PValue") like @1236)

而且我不明白這是怎麼回事。我們看到具有奇怪名稱的參數，並且當然在q.Params集合中沒有這樣的名稱參數...

來源

2017-04-25 Dmitry

這已修復爲最新版本...

來源

2017-05-03 09:28:37 Dmitry

OrmLite拋出供給命令

回答

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