public List <FscOwnerForeign> ExtractFscOwnersForeign(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='FSC' 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 <FscOwnerForeign> fscOwnersForeign = new List <FscOwnerForeign>();
while (reader.Read())
{
FscOwnerForeign fscOwnerForeign = new FscOwnerForeign();
fscOwnerForeign.WebUatId = reader.GetInt32(0);
fscOwnerForeign.FscWebUatId = reader.GetInt32(1);
fscOwnerForeign.OwnerWebUatId = reader.GetInt32(2);
fscOwnersForeign.Add(fscOwnerForeign);
}
reader.Dispose();
return(fscOwnersForeign);
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
return(null);
}
}
}
}
public async Task <FscOwner> LoadSingleAsync(WRLDCWarehouseDbContext _context, ILogger _log, FscOwnerForeign fscOwnerForeign, EntityWriteOption opt)
{
// check if entity already exists
FscOwner existingFscOwner = await _context.FscOwners.SingleOrDefaultAsync(fO => fO.WebUatId == fscOwnerForeign.WebUatId);
// check if we should not modify existing entities
if (opt == EntityWriteOption.DontReplace && existingFscOwner != null)
{
return(existingFscOwner);
}
// find the Fsc via the Fsc WebUatId
int fscWebUatId = fscOwnerForeign.FscWebUatId;
Fsc fsc = await _context.Fscs.SingleOrDefaultAsync(c => c.WebUatId == fscWebUatId);
// if Fsc doesnot exist, skip the import. Ideally, there should not be such case
if (fsc == null)
{
_log.LogCritical($"Unable to find Fsc with webUatId {fscWebUatId} while inserting FscOwner with webUatId {fscOwnerForeign.WebUatId}");
return(null);
}
// find the Owner of the Fsc via the Owner WebUatId
int ownerWebUatId = fscOwnerForeign.OwnerWebUatId;
Owner owner = await _context.Owners.SingleOrDefaultAsync(o => o.WebUatId == ownerWebUatId);
// if owner doesnot exist, skip the import. Ideally, there should not be such case
if (owner == null)
{
_log.LogCritical($"Unable to find Owner with webUatId {ownerWebUatId} while inserting FscOwner with webUatId {fscOwnerForeign.WebUatId}");
return(null);
}
try
{
// check if we have to replace the entity completely
if (opt == EntityWriteOption.Replace && existingFscOwner != null)
{
_context.FscOwners.Remove(existingFscOwner);
}
// if entity is not present, then insert or check if we have to replace the entity completely
if (existingFscOwner == null || (opt == EntityWriteOption.Replace && existingFscOwner != null))
{
FscOwner newFscOwner = new FscOwner();
newFscOwner.OwnerId = owner.OwnerId;
newFscOwner.FscId = fsc.FscId;
newFscOwner.WebUatId = fscOwnerForeign.WebUatId;
_context.FscOwners.Add(newFscOwner);
await _context.SaveChangesAsync();
return(newFscOwner);
}
// check if we have to modify the entity
if (opt == EntityWriteOption.Modify && existingFscOwner != null)
{
existingFscOwner.OwnerId = owner.OwnerId;
existingFscOwner.FscId = fsc.FscId;
await _context.SaveChangesAsync();
return(existingFscOwner);
}
}
catch (DbUpdateException e)
{
_log.LogCritical($"Error occured while inserting FscOwner with webUatId {fscOwnerForeign.WebUatId}, owner id {owner.OwnerId} and fscId {fsc.FscId}");
_log.LogCritical($"EntityWriteOption = {opt.ToString()}");
_log.LogCritical($"{e.Message}");
return(null);
}
return(null);
}
