private static IQueryable <T> OrderByDescending <T>(this IQueryable <T> queryable,
IRelationalSpecification <T> specification) where T : class
{
return(specification.OrderByDescending == default || specification.OrderBy != default
? queryable
: queryable.OrderByDescending(specification.OrderByDescending));
}
public static IQueryable <T> Specify <T>(this IQueryable <T> queryable, IRelationalSpecification <T> specification)
where T : class
{
return(queryable
.SetTracking(specification)
.Include(specification)
.Where(specification)
.OrderBy(specification)
.OrderByDescending(specification)
.SkipTake(specification));
}
private static IQueryable <T> SetTracking <T>(this IQueryable <T> queryable,
IRelationalSpecification <T> specification) where T : class
{
return(specification.TrackingEnabled ? queryable : queryable.AsNoTracking());
}
private static IQueryable <T> Where <T>(this IQueryable <T> queryable, IRelationalSpecification <T> specification)
where T : class
{
return(specification.Criteria == default ? queryable : queryable.Where(specification.Criteria));
}
private static IQueryable <T> SkipTake <T>(this IQueryable <T> queryable,
IRelationalSpecification <T> specification) where T : class
{
return(specification.Take == 0 ? queryable : queryable.Skip(specification.Skip).Take(specification.Take));
}
private static IQueryable <T> Include <T>(this IQueryable <T> queryable, IRelationalSpecification <T> specification)
where T : class
{
return(specification.Includes.Aggregate(queryable, (current, include) => current.Include(include)));
}
