/// <summary>
/// Returns a list of dynamic rows and optionally their count as per the specifications in <paramref name="args"/>.
/// </summary>
public virtual async Task <FactResult> GetFact(FactArguments args, CancellationToken cancellation)
{
await Initialize(cancellation);
// Parse the parameters
var filter = ExpressionFilter.Parse(args.Filter);
var orderby = ExpressionOrderBy.Parse(args.OrderBy);
var select = ExpressionFactSelect.Parse(args.Select);
// Prepare the query
var query = QueryFactory().FactQuery <TEntity>();
// Apply read permissions
var permissionsFilter = await UserPermissionsFilter(PermissionActions.Read, cancellation);
query = query.Filter(permissionsFilter);
// Apply filter
query = query.Filter(filter);
// Apply orderby
orderby ??= await DefaultOrderBy(cancellation);
query = query.OrderBy(orderby);
// Apply the paging (Protect against DOS attacks by enforcing a maximum page size)
var top = args.Top;
var skip = args.Skip;
top = Math.Min(top, MaximumPageSize());
query = query.Skip(skip).Top(top);
// Apply the select
query = query.Select(select);
// Load the data and count in memory
List <DynamicRow> data;
int?count = null;
if (args.CountEntities)
{
(data, count) = await query.ToListAndCountAsync(MaximumCount, QueryContext, cancellation);
}
else
{
data = await query.ToListAsync(QueryContext, cancellation);
}
// Return
return(new FactResult(data, count));
}
public virtual async Task <ActionResult <GetFactResponse> > GetFact([FromQuery] FactArguments args, CancellationToken cancellation)
{
// Calculate server time at the very beginning for consistency
var serverTime = DateTimeOffset.UtcNow;
// Retrieves the raw data from the database, unflattend, untrimmed
var service = GetFactService();
var result = await service.GetFact(args, cancellation);
var data = result.Data;
var count = result.Count;
// Prepare the result in a response object
var response = new GetFactResponse
{
ServerTime = serverTime,
Result = data,
TotalCount = count
};
return(Ok(response));
}
