private static void RemoveTwoEntitiesWithFilteredIndex(JustDatabaseContext context)
{
Console.WriteLine("Deleting entities...");
var entitiesToDelete = context.Users.Where(x => x.IsActive == false);
context.RemoveRange(entitiesToDelete);
SaveChangesAndWriteToConsoleException(context);
}
private static void CreateTwoTheSameEntitiesWhichDoNotMetFilterConditions(JustDatabaseContext context)
{
context.Users.Add(new Model.User {
IsActive = false, Login = "******", Email = "*****@*****.**"
});
context.Users.Add(new Model.User {
IsActive = false, Login = "******", Email = "*****@*****.**"
});
context.SaveChanges();
}
static void Main(string[] args)
{
InitializeDiContainer();
JustDatabaseContext context = MigrateDatabase();
CreateTwoTheSameEntitiesWhichDoNotMetFilterConditions(context);
UpdateTwoEntitiesWithFilteredIndex(context);
RemoveTwoEntitiesWithFilteredIndex(context);
// CleanupDatabase(context);
Console.ReadKey();
}
private static void UpdateTwoEntitiesWithFilteredIndex(JustDatabaseContext context)
{
Console.WriteLine("Updating entities...");
var entitiesToUpdate = context.Users.Where(x => x.IsActive == false);
int i = 0;
foreach (var entity in entitiesToUpdate)
{
entity.Login = "******" + i++;
}
SaveChangesAndWriteToConsoleException(context);
}
private static void SaveChangesAndWriteToConsoleException(JustDatabaseContext context)
{
try
{
// The problem occurs during saving changes
context.SaveChanges();
}
catch (Exception ex)
{
Console.ForegroundColor = ConsoleColor.Red;
Console.WriteLine(ex.Message);
Console.ResetColor();
}
}
private static void CleanupDatabase(JustDatabaseContext context)
{
context.RemoveRange(context.Users);
context.SaveChanges();
}
