/// <summary>
/// This will validate any entity classes that will be added or updated
/// If the validation does not produce any errors then SaveChangesAsync will be called
/// </summary>
/// <param name="context"></param>
/// <param name="config"></param>
/// <returns>List of errors, empty if there were no errors</returns>
public static async Task <IStatusGeneric> SaveChangesWithValidationAsync(this DbContext context, IGenericServicesConfig config = null)
{
var status = context.ExecuteValidation();
if (!status.IsValid)
{
return(status);
}
context.ChangeTracker.AutoDetectChangesEnabled = false;
try
{
await context.SaveChangesAsync().ConfigureAwait(false);
}
catch (Exception e)
{
var exStatus = config?.SaveChangesExceptionHandler(e, context);
if (exStatus == null)
{
throw; //error wasn't handled, so rethrow
}
status.CombineStatuses(exStatus);
}
finally
{
context.ChangeTracker.AutoDetectChangesEnabled = true;
}
return(status);
}
private static async Task <IStatusGeneric> SaveChangesWithExtrasAsync(this DbContext context,
IGenericServicesConfig config, bool turnOffChangeTracker = false)
{
var status = config?.BeforeSaveChanges != null
? config.BeforeSaveChanges(context)
: new StatusGenericHandler();
if (!status.IsValid)
{
return(status);
}
if (turnOffChangeTracker)
{
context.ChangeTracker.AutoDetectChangesEnabled = false;
}
try
{
//This handles SaveChangesExceptionHandlers that can fix the exception, and the SaveChanges i tried again
do
{
try
{
await context.SaveChangesAsync().ConfigureAwait(false);
break; //This breaks out of the do/while
}
catch (Exception e)
{
var exStatus = config?.SaveChangesExceptionHandler(e, context);
if (exStatus == null)
{
throw; //error wasn't handled, so rethrow
}
status.CombineStatuses(exStatus);
}
} while (status.IsValid);
}
finally
{
context.ChangeTracker.AutoDetectChangesEnabled = true;
}
return(status);
}
//-----------------------------------------------------------------
//private methods
private static IStatusGeneric SaveChangesWithExtras(this DbContext context,
IGenericServicesConfig config, bool turnOffChangeTracker = false)
{
var status = config?.BeforeSaveChanges != null
? config.BeforeSaveChanges(context)
: new StatusGenericHandler();
if (!status.IsValid)
{
return(status);
}
if (turnOffChangeTracker)
{
context.ChangeTracker.AutoDetectChangesEnabled = false;
}
try
{
context.SaveChanges();
}
catch (Exception e)
{
var exStatus = config?.SaveChangesExceptionHandler(e, context);
if (exStatus == null)
{
throw; //error wasn't handled, so rethrow
}
status.CombineStatuses(exStatus);
}
finally
{
context.ChangeTracker.AutoDetectChangesEnabled = true;
}
return(status);
}
