internal AggregateQueryable(IAggregateFluent <TEntity> aggregate, IMongoQueryable <TEntity> queryable)
{
aggregate.NotNull(nameof(aggregate));
queryable.NotNull(nameof(queryable));
queryable.ElementType.NotNull(nameof(queryable.ElementType));
queryable.Expression.NotNull(nameof(queryable.Expression));
aggregateQueryProvider = new AggregateQueryProvider <TEntity>(queryable, this, aggregate);
ElementType = queryable.ElementType;
Expression = queryable.Expression;
}
public static IAggregateQueryable <TEntity> AsAggregateQueryable <TEntity>(this IMongoQueryable <TEntity> queryable)
{
queryable.NotNull(nameof(queryable));
var type = queryable.Provider.GetType().GetTypeInfo();
var collectionField = type.GetField("_collection", BindingFlags.Instance | BindingFlags.NonPublic);
var optionsField = type.GetField("_options", BindingFlags.Instance | BindingFlags.NonPublic);
if (!(collectionField?.GetValue(queryable.Provider) is IMongoCollection <TEntity> collection))
{
throw new NotSupportedException("This type of IMongoQueryable<> dose not support converting to IAggregateQueryable<>");
}
if (!(optionsField?.GetValue(queryable.Provider) is AggregateOptions options))
{
throw new NotSupportedException("This type of IMongoQueryable<> dose not support converting to IAggregateQueryable<>");
}
var aggregate = collection.Aggregate(options);
return(new AggregateQueryable <TEntity>(aggregate, queryable));
}
