public override BsonValue Render()
{
var fieldPath = _field.Path;
if (fieldPath == "@<elem>")
{
return(_operation.Render());
}
if (fieldPath.StartsWith("@<elem>."))
{
fieldPath = fieldPath.Substring(8);
}
if (_operation is AstComparisonFilterOperation comparisonOperation &&
comparisonOperation.Operator == AstComparisonFilterOperator.Eq &&
comparisonOperation.Value.BsonType != BsonType.RegularExpression)
{
return(new BsonDocument(fieldPath, comparisonOperation.Value)); // implied $eq
}
if (
_operation is AstElemMatchFilterOperation elemMatchOperation &&
elemMatchOperation.Filter is AstFieldOperationFilter fieldOperationFilter &&
fieldOperationFilter.Field.Path == "@<elem>")
{
if (fieldOperationFilter.Operation is AstComparisonFilterOperation elemMatchComparisonOperation &&
elemMatchComparisonOperation.Operator == AstComparisonFilterOperator.Eq &&
elemMatchComparisonOperation.Value.BsonType != BsonType.RegularExpression)
{
return(new BsonDocument(fieldPath, elemMatchComparisonOperation.Value)); // implied $elemMatch with $eq
}
if (fieldOperationFilter.Operation is AstRegexFilterOperation elemMatchRegexOperation)
{
return(new BsonDocument(fieldPath, elemMatchRegexOperation.Render())); // implied $elemMatch with $regex
}
}
return(new BsonDocument(fieldPath, _operation.Render()));
}
public override BsonValue Render()
{
return(new BsonDocument("$not", _operation.Render()));
}