public async Task <IActionResult> RemoveCitiesFromCountry([FromForm] RemoveCitiesFromCountryVM country)
{
if (country.CountryId == Guid.Empty)
{
ModelState.AddModelError(string.Empty, "Unexpected error occurred: The ID was blank.");
return(BadRequest(ModelState));
}
var result = await _service.RemoveCitiesFromCountry(country);
if (result.Message == ActionMessages.Updated)
{
var cities = country.CitiesId.Count > 1 ? "cities" : "city";
return(RedirectToAction(nameof(Details), new { id = result.Country.Id, message = $"The requested {cities} were successfully removed from {result.Country.Name}." }));
}
else if (result.Message == ActionMessages.NotFound)
{
ModelState.AddModelError(string.Empty, $"Not country was found with ID: {country.CountryId}.");
return(NotFound(ModelState));
}
else
{
ModelState.AddModelError(string.Empty, $"Unexpected error occurred: The action {result.Message.ToString()}.");
return(BadRequest(ModelState));
}
}
public async Task <CountryWithMessage> RemoveCitiesFromCountry(RemoveCitiesFromCountryVM country)
{
try
{
if (country.CountryId == Guid.Empty)
{
throw new Exception("Unexpected error occurred: CountryId was blank.");
}
if (country.CitiesId == null || country.CitiesId.Count == 0)
{
throw new Exception("Unexpected error occurred: No ID's were found in list.");
}
var original = await _db.Countries.Include(x => x.Cities).FirstOrDefaultAsync(x => x.Id == country.CountryId);
if (original == null)
{
return(new CountryWithMessage {
Message = ActionMessages.NotFound
});
}
foreach (var cityId in country.CitiesId)
{
var city = await _db.Cities.FirstOrDefaultAsync(x => x.Id == cityId);
if (original.Cities.Contains(city))
{
original.Cities.Remove(city);
}
}
await _db.SaveChangesAsync();
return(new CountryWithMessage {
Country = original, Message = ActionMessages.Updated
});
}
catch (Exception ex)
{
throw new NullReferenceException(ex.Message, ex.InnerException);
}
}
