public async Task <T> FirstOrDefaultAsync(System.Linq.Expressions.Expression <Func <T, bool> > filter, System.Linq.Expressions.Expression <Func <T, T> > selector = null, System.Linq.Expressions.Expression <Func <T, object> > include = null)
{
using (var db = new L2DBContext())
{
IQueryable <T> query;
if (include != null)
{
query = db.GetTable <T>().LoadWith(include);
}
else
{
query = db.GetTable <T>();
}
if (filter != null)
{
query = query.Where(filter);
}
if (selector != null)
{
query = query.Select(selector);
}
return(await query.FirstOrDefaultAsync());
}
}
public async Task <IEnumerable <T> > GetAsync(Expression <Func <T, bool> > filter = null, Expression <Func <T, T> > selector = null, int?page = null, int?size = null, Expression <Func <T, object> > include = null)
{
using (var db = new L2DBContext())
{
IQueryable <T> query;
if (include != null)
{
query = db.GetTable <T>().LoadWith(include);
}
else
{
query = db.GetTable <T>();
}
if (filter != null)
{
query = query.Where(filter);
}
if (selector != null)
{
query = query.Select(selector);
}
if (page != null && size != null)
{
query = query.Take((page.Value - 1) * size.Value).Skip(size.Value);
}
return(await query.ToListAsync());
}
}
public async Task <T> FindByIdAsync(int id)
{
using (var db = new L2DBContext())
{
return(await db.GetTable <T>().Where(e => e.Id == id).FirstOrDefaultAsync());
}
}
public IQueryable <T> GetQueryable()
{
var db = new L2DBContext();
return(db.GetTable <T>().AsQueryable());
}