public List <AcTransmissionLineCircuitOwnerForeign> ExtractAcTransLineCktOwnersForeign(string oracleConnString)
{
using (OracleConnection con = new OracleConnection(oracleConnString))
{
using (OracleCommand cmd = con.CreateCommand())
{
try
{
con.Open();
cmd.BindByName = true;
cmd.CommandText = "select ID, PARENT_ENTITY_ATTRIBUTE_ID, CHILD_ENTITY_ATTRIBUTE_ID from ENTITY_ENTITY_RELN where :id=1 and PARENT_ENTITY='AC_TRANSMISSION_LINE' and CHILD_ENTITY='OWNER' and PARENT_ENTITY_ATTRIBUTE='Owner' and CHILD_ENTITY_ATTRIBUTE='OwnerId'";
// Assign id parameter
OracleParameter id = new OracleParameter("id", 1);
cmd.Parameters.Add(id);
//Execute the command and use DataReader to display the data
OracleDataReader reader = cmd.ExecuteReader();
List <AcTransmissionLineCircuitOwnerForeign> cktOwnersForeign = new List <AcTransmissionLineCircuitOwnerForeign>();
while (reader.Read())
{
AcTransmissionLineCircuitOwnerForeign cktOwnerForeign = new AcTransmissionLineCircuitOwnerForeign();
cktOwnerForeign.WebUatId = reader.GetInt32(0);
cktOwnerForeign.AcTranLineCktWebUatId = reader.GetInt32(1);
cktOwnerForeign.OwnerWebUatId = reader.GetInt32(2);
cktOwnersForeign.Add(cktOwnerForeign);
}
reader.Dispose();
return(cktOwnersForeign);
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
return(null);
}
}
}
}
public async Task <AcTransLineCktOwner> LoadSingleAsync(WRLDCWarehouseDbContext _context, ILogger _log, AcTransmissionLineCircuitOwnerForeign acCktOwnerForeign, EntityWriteOption opt)
{
// check if entity already exists
AcTransLineCktOwner existingAcCktOwner = await _context.AcTransLineCktOwners.SingleOrDefaultAsync(aco => aco.WebUatId == acCktOwnerForeign.WebUatId);
// check if we should not modify existing entities
if (opt == EntityWriteOption.DontReplace && existingAcCktOwner != null)
{
return(existingAcCktOwner);
}
// find the AcTranLineCkt via the AcTranLineCkt WebUatId
int acCktWebUatId = acCktOwnerForeign.AcTranLineCktWebUatId;
AcTransLineCkt acTransCkt = await _context.AcTransLineCkts.SingleOrDefaultAsync(ss => ss.WebUatId == acCktWebUatId);
// if AcTransLineCkt doesnot exist, skip the import. Ideally, there should not be such case
if (acTransCkt == null)
{
_log.LogCritical($"Could not find AcTransLineCkt with WebUatId {acCktWebUatId} in warehouse while creating AcTransLineCktOwner with WebUat Id {acCktOwnerForeign.WebUatId}");
return(null);
}
// find the Owner of the AcTransLineCkt via the Owner WebUatId
int ownerWebUatId = acCktOwnerForeign.OwnerWebUatId;
Owner owner = await _context.Owners.SingleOrDefaultAsync(o => o.WebUatId == ownerWebUatId);
// if owner doesnot exist, skip the import. Ideally, there should not be such case
if (owner == null)
{
_log.LogCritical($"Could not find Owner with WebUatId {ownerWebUatId} in warehouse while creating AcTransLineCktOwner with WebUat Id {acCktOwnerForeign.WebUatId}");
return(null);
}
// check if we have to replace the entity completely
if (opt == EntityWriteOption.Replace && existingAcCktOwner != null)
{
_context.AcTransLineCktOwners.Remove(existingAcCktOwner);
}
// if entity is not present, then insert or check if we have to replace the entity completely
if (existingAcCktOwner == null || (opt == EntityWriteOption.Replace && existingAcCktOwner != null))
{
AcTransLineCktOwner acCktOwner = new AcTransLineCktOwner();
acCktOwner.OwnerId = owner.OwnerId;
acCktOwner.AcTransLineCktId = acTransCkt.AcTransLineCktId;
acCktOwner.WebUatId = acCktOwnerForeign.WebUatId;
_context.AcTransLineCktOwners.Add(acCktOwner);
await _context.SaveChangesAsync();
return(acCktOwner);
}
// check if we have to modify the entity
if (opt == EntityWriteOption.Modify && existingAcCktOwner != null)
{
existingAcCktOwner.OwnerId = owner.OwnerId;
existingAcCktOwner.AcTransLineCktId = acTransCkt.AcTransLineCktId;
await _context.SaveChangesAsync();
return(existingAcCktOwner);
}
return(null);
}
