RavenDB 3.0 索引创建：表达式树可能不包含动态操作？

Question

这是创建简单索引以避免从 Ayende's post 扇出索引的示例代码。但是它无法编译。错误是

"An expression tree may not contain a dynamic operation".

如果去掉演员表

IEnumerable<dynamic>

从代码来看，它编译但未能生成索引。这应该是 RavenDB 3.0 用户的常见问题。有什么建议吗？

from doc in docs.Users select new {
CreditCards_Expired = (
    from docCreditCardsItem in ((IEnumerable<dynamic>)doc.CreditCards).DefaultIfEmpty()
    select docCreditCardsItem.Expired).ToArray(),
Roles_Name = (
    from docRolesItem in ((IEnumerable<dynamic>)doc.Roles).DefaultIfEmpty()
    select docRolesItem.Name).ToArray()

}

Answer 1

尝试使用：

from doc in docs.Users 
select new {
    CreditCards_Expired = doc.CreditCards.Select(c=>c.Expired),
    Roles_Name = doc.Roles.Select(r=>r.Names)
}

RavenDB 3.0 索引创建：表达式树可能不包含动态操作？

RavenDB 3.0 index creation: An expression tree may not contain a dynamic operation?

indexing

expression

ravendb