public IJoinInfo VisitUnresolvedCollectionJoinInfo(UnresolvedCollectionJoinInfo joinInfo)
{
ArgumentUtility.CheckNotNull("joinInfo", joinInfo);
var resolvedExpression = _stage.ResolveCollectionSourceExpression(joinInfo.SourceExpression, _context);
while (resolvedExpression is UnaryExpression)
{
resolvedExpression = _stage.ResolveCollectionSourceExpression(((UnaryExpression)resolvedExpression).Operand, _context);
}
var resolvedExpressionAsEntity = resolvedExpression as SqlEntityExpression;
if (resolvedExpressionAsEntity != null)
{
var unresolvedJoinInfo = new UnresolvedJoinInfo(resolvedExpressionAsEntity, joinInfo.MemberInfo, JoinCardinality.Many);
return(unresolvedJoinInfo.Accept(this));
}
var message = string.Format(
"Only entities can be used as the collection source in from expressions, '{0}' cannot. Member: '{1}'",
resolvedExpression,
joinInfo.MemberInfo);
throw new NotSupportedException(message);
}