public async Task ValidateAsync(IBandContainer bandContainer)
{
if (bandContainer == null)
{
throw new ArgumentNullException(nameof(bandContainer));
}
var concert = await this.GetBy(bandContainer);
if (bandContainer.BandId.HasValue && concert == null)
{
throw new InvalidOperationException($"Concert not found by id {bandContainer.BandId}");
}
}
public async Task <Band> GetByAsync(IBandContainer band)
{
return(band.BandId.HasValue
? this.Mapper.Map <Band>(await this.Context.Band.FirstOrDefaultAsync(x => x.Id == band.BandId))
: null);
}
private Task <Band> GetBy(IBandContainer bandContainer)
{
return(this.BandDataAccess.GetByAsync(bandContainer));
}
