public List <CompensatorOwnerForeign> ExtractCompensatorOwnersForeign(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 REPORTING_WEB_UI_UAT.ENTITY_ENTITY_RELN
WHERE PARENT_ENTITY='TCSC' and PARENT_ENTITY_ATTRIBUTE='Owner' and CHILD_ENTITY='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 <CompensatorOwnerForeign> compensatorOwnersForeign = new List <CompensatorOwnerForeign>();
while (reader.Read())
{
CompensatorOwnerForeign compensatorOwnerForeign = new CompensatorOwnerForeign();
compensatorOwnerForeign.WebUatId = reader.GetInt32(0);
compensatorOwnerForeign.CompensatorWebUatId = reader.GetInt32(1);
compensatorOwnerForeign.OwnerWebUatId = reader.GetInt32(2);
compensatorOwnersForeign.Add(compensatorOwnerForeign);
}
reader.Dispose();
return(compensatorOwnersForeign);
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
return(null);
}
}
}
}
public async Task <CompensatorOwner> LoadSingleAsync(WRLDCWarehouseDbContext _context, ILogger _log, CompensatorOwnerForeign compensatorOwnerForeign, EntityWriteOption opt)
{
// check if entity already exists
CompensatorOwner existingCompensatorOwner = await _context.CompensatorOwners.SingleOrDefaultAsync(cO => cO.WebUatId == compensatorOwnerForeign.WebUatId);
// check if we should not modify existing entities
if (opt == EntityWriteOption.DontReplace && existingCompensatorOwner != null)
{
return(existingCompensatorOwner);
}
// find the Compensator via the Compensator WebUatId
int compensatorWebUatId = compensatorOwnerForeign.CompensatorWebUatId;
Compensator compensator = await _context.Compensators.SingleOrDefaultAsync(c => c.WebUatId == compensatorWebUatId);
// if Compensator doesnot exist, skip the import. Ideally, there should not be such case
if (compensator == null)
{
_log.LogCritical($"Unable to find Compensator with webUatId {compensatorWebUatId} while inserting CompensatorOwner with webUatId {compensatorOwnerForeign.WebUatId}");
return(null);
}
// find the Owner of the Compensator via the Owner WebUatId
int ownerWebUatId = compensatorOwnerForeign.OwnerWebUatId;
Owner owner = await _context.Owners.SingleOrDefaultAsync(o => o.WebUatId == ownerWebUatId);
// if owner doesnot exist, skip the import. Ideally, there should not be such case
if (owner == null)
{
_log.LogCritical($"Unable to find Owner with webUatId {ownerWebUatId} while inserting CompensatorOwner with webUatId {compensatorOwnerForeign.WebUatId}");
return(null);
}
try
{
// check if we have to replace the entity completely
if (opt == EntityWriteOption.Replace && existingCompensatorOwner != null)
{
_context.CompensatorOwners.Remove(existingCompensatorOwner);
}
// if entity is not present, then insert or check if we have to replace the entity completely
if (existingCompensatorOwner == null || (opt == EntityWriteOption.Replace && existingCompensatorOwner != null))
{
CompensatorOwner newCompensatorOwner = new CompensatorOwner();
newCompensatorOwner.OwnerId = owner.OwnerId;
newCompensatorOwner.CompensatorId = compensator.CompensatorId;
newCompensatorOwner.WebUatId = compensatorOwnerForeign.WebUatId;
_context.CompensatorOwners.Add(newCompensatorOwner);
await _context.SaveChangesAsync();
return(newCompensatorOwner);
}
// check if we have to modify the entity
if (opt == EntityWriteOption.Modify && existingCompensatorOwner != null)
{
existingCompensatorOwner.OwnerId = owner.OwnerId;
existingCompensatorOwner.CompensatorId = compensator.CompensatorId;
await _context.SaveChangesAsync();
return(existingCompensatorOwner);
}
}
catch (DbUpdateException e)
{
_log.LogCritical($"Error occured while inserting CompensatorOwner with webUatId {compensatorOwnerForeign.WebUatId}, owner id {owner.OwnerId} and compensatorId {compensator.CompensatorId}");
_log.LogCritical($"EntityWriteOption = {opt.ToString()}");
_log.LogCritical($"{e.Message}");
return(null);
}
return(null);
}
