public IQueryable <TEntity> GetAll()
{
try
{
return(_context.Set <TEntity>());
}
catch (Exception ex)
{
throw new Exception($"Couldn't retrieve entities: {ex.Message}");
}
}
static void Main(string[] args)
{
IHost host = CreateHostBuilder(args).Build();
Task task = host.RunAsync();
User user = new User()
{
Name = "111",
Blogs = new System.Collections.Generic.List <Blog> {
new Blog {
Url = "htts://dev.haocai.com.cn", Posts = new System.Collections.Generic.List <Post> {
new Post {
Title = "1111"
}, new Post {
Title = "2222"
}
}
}
}
};
EFDemoContext context = host.Services.GetService <EFDemoContext>();
context.Database.EnsureDeleted();
context.Database.Migrate();
EntityEntry <User> ent = context.Set <User>().Add(user);
context.SaveChanges();
user.Name = "CCCC";
context.SaveChanges();
Console.ReadKey();
}
public async Task <bool> DeleteAsync(object obj)
{
var entity = await _context.Set <TEntity>().FindAsync(obj);
if (entity == null)
{
throw new ArgumentNullException($"{nameof(DeleteAsync)} entity must not be null");
}
try
{
_context.Set <TEntity>().Remove(entity);
DisplayStates(_context.ChangeTracker.Entries());
await _context.SaveChangesAsync();
return(true);
}
catch (Exception ex)
{
throw new Exception($"{nameof(entity)} could not be deleted: {ex.Message}");
}
}
public IQueryable <T> Get()
{
return(_context.Set <T>());
}