public static IQueryable <TEntity> Paginate <TEntity, TModel>(this
IQueryable <TEntity> result,
TModel options)
where TModel : IQueryPaging
{
var attr = Attribute.GetCustomAttributes(PrimitiveExtensions.GetProperty <TModel>("Limit")).FirstOrDefault();
// Check for the AnimalType attribute.
if (attr?.GetType() == typeof(QueryOperatorAttribute))
{
var data = (QueryOperatorAttribute)attr;
if (data.Max > 0)
{
options.Limit = data.Max;
}
}
if (options.Offset.HasValue)
{
result = result.Skip(options.Offset.Value);
}
if (options.Limit.HasValue)
{
result = result.Take(options.Limit.Value);
}
return(result);
}
public static IQueryable <TEntity> Paginate <TEntity, TModel>(this
IQueryable <TEntity> result,
TModel options)
where TModel : class, IQueryPaging
{
var attr = Attribute.GetCustomAttribute(PrimitiveExtensions.GetProperty(options.GetType(), "Limit"), typeof(QueryOperatorAttribute));
if (attr?.GetType() == typeof(QueryOperatorAttribute))
{
var data = (QueryOperatorAttribute)attr;
if (data.Max > 0)
{
options.Limit = data.Max;
}
}
if (options.Offset.HasValue)
{
result = result.Skip(options.Offset.Value);
}
if (options.Limit.HasValue)
{
result = result.Take(options.Limit.Value);
}
return(result);
}
public static IQueryable <TEntity> Sort <TEntity>(this IQueryable <TEntity> result, string fields)
{
if (string.IsNullOrEmpty(fields))
{
return(result);
}
var useThenBy = false;
foreach (var sortTerm in fields.Fields())
{
var property = PrimitiveExtensions.GetProperty <TEntity>(sortTerm.FieldName());
if (property != null)
{
var command = useThenBy ? "ThenBy" : "OrderBy";
command += sortTerm.IsDescending() ? "Descending" : string.Empty;
result = result.OrderBy(property, command);
}
useThenBy = true;
}
return(result);
}
