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Resolved Converted datawindow with SQLModelMapper - Correlation Name not found
  1. How-to
  2.  SqlModelMapper
0 Votes
  1. Dan Harrel
  2. SnapObjects
  3. Tuesday, 8 December 2020 05:09 PM UTC

I'm building a web API in SnapDevelop using SQLModelMapper and ODBC, and this is all new to me so far.  I have converted a PowerBuilder datawindow to the following (omitted Usings):

namespace MyApp.Models
{
    [DataWindow("d_prt", DwStyle.Default)]
    [Table("part")]
    #region DwSelectAttribute  
    [DwSelect("select \r\n "
                  +"@(_COLUMNS_PLACEHOLDER_) \r\n "
                  +"from \r\n "
                  +"part p \r\n "
                  +"where \r\n "
                  +"p.prt_id=:a_prt_id")]
    #endregion
    [DwParameter("a_prt_id", typeof(double?))]
    [DwKeyModificationStrategy(UpdateSqlStrategy.DeleteThenInsert)]
    [UpdateWhereStrategy(UpdateWhereStrategy.KeyAndConcurrencyCheckColumns)]
    public class D_Prt
    {
        [Key]
        [Identity]
        [DwColumn("p", "prt_id")]
        public int Prt_Id { get; set; }

        [ConcurrencyCheck]
        [DwColumn("p", "prt_cd")]
        public string Prt_Cd { get; set; }

        [ConcurrencyCheck]
        [DwColumn("p", "prt_nm")]
        public string Prt_Nm { get; set; }

    }

}

My Service class contains the following line which throws an error:

D_Prt d_prt = _dataContext.SqlModelMapper.Load<D_Prt>(prt_id).FirstOrDefault();

The error is:

OdbcException: ERROR [42S02] [SAP][ODBC Driver][SQL Anywhere]Correlation name 'p' not found

The correlation name is defined in the DwSelect attribute value, above.  Is SQLModelMapper modifying my Select statement?  If so, how can I see what it modifies it to?  How can I get around this problem?  

Thanks!

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