public static GraphQueryBase <TDto> ExtractParams <TDto>(this GraphQueryBase <TDto> request,
IResolverContext context)
{
var page = context.Argument <int>("page") <= 0 ? 1 : context.Argument <int>("page");
var pageSize = context.Argument <int>("pageSize") <= 0 ? 20 : context.Argument <int>("pageSize");
var filterExpr = context.GetQueryableFilterExpr <TDto>();
var sortExpr = context.GetQueryableSortExpr <TDto>();
request.Page = page;
request.PageSize = pageSize;
request.FilterExpr = filterExpr;
request.SortingVisitor = sortExpr;
return(request);
}
public static OffsetPaging <TResult> WithCriterions <TResult>(this IQueryable <TResult> source, GraphQueryBase <TResult> queryBase)
{
// filter by GraphQL
if (queryBase.FilterExpr != null)
{
source = source.Where(queryBase.FilterExpr);
}
// order_by by GraphQL
if (queryBase.SortingVisitor != null)
{
source = queryBase.SortingVisitor.Sort(source);
}
// pagination
var totalCount = source.Count();
source = source.Skip((queryBase.Page - 1) * queryBase.PageSize).Take(queryBase.PageSize);
// build pagination model
var model = new OffsetPaging <TResult> {
TotalCount = totalCount, Edges = source.ToList()
};
return(model);
}
