public static async Task <PaginatedItem <TResponse> > QueryAsync <TDbContext, TEntity, TEntityId, TResponse>(
this IQueryRepository <TEntity, TEntityId> repo,
PaginateCriteria paginateCriteria,
Expression <Func <TEntity, TResponse> > selector,
Func <IQueryable <TEntity>, IIncludableQueryable <TEntity, object> > include = null,
bool disableTracking = true)
where TDbContext : DbContext
where TEntity : class, IAggregateRoot <TEntityId>
{
return(await GetDataAsync <TDbContext, TEntity, TEntityId, TResponse>(repo, paginateCriteria, selector, null, include, disableTracking));
}
private static async Task <PaginatedItem <TResponse> > GetDataAsync <TDbContext, TEntity, TEntityId, TResponse>(
IQueryRepository <TEntity, TEntityId> repo,
PaginateCriteria paginateCriteria,
Expression <Func <TEntity, TResponse> > selector,
Expression <Func <TEntity, bool> > filter = null,
Func <IQueryable <TEntity>, IIncludableQueryable <TEntity, object> > include = null,
bool disableTracking = true)
where TDbContext : DbContext
where TEntity : class, IAggregateRoot <TEntityId>
{
var queryable = repo.Queryable();
if (disableTracking)
{
queryable = queryable.AsNoTracking();
}
if (include != null)
{
queryable = include.Invoke(queryable);
}
if (filter != null)
{
queryable = queryable.Where(filter);
}
if (!string.IsNullOrWhiteSpace(paginateCriteria.SortBy))
{
var isDesc = string.Equals(paginateCriteria.SortOrder, "desc", StringComparison.OrdinalIgnoreCase) ? true : false;
queryable = queryable.OrderByPropertyName <TEntity, TEntityId>(paginateCriteria.SortBy, isDesc);
}
var results = await queryable
.Skip(paginateCriteria.CurrentPage *paginateCriteria.PageSize)
.Take(paginateCriteria.PageSize)
.Select(selector)
.ToListAsync();
var totalRecord = await queryable.CountAsync();
var totalPages = (int)Math.Ceiling((double)totalRecord / paginateCriteria.PageSize);
if (paginateCriteria.CurrentPage > totalPages)
{
paginateCriteria.SetCurrentPage(totalPages);
}
return(new PaginatedItem <TResponse>(totalRecord, totalPages, results));
}
