Question

我有以下对象，我将其作为文档保存在我的数据库中：

public class ClientContactsModel
{
    public ClientContactsModel()
    {
        Contacts = new List<ContactItem>();
    }

    public Guid Id { get; set; }
    public Guid ClientId { get; set; }
    public List<ContactItem> Contacts { get; set; }
}

如何编写索引来计算每个ClientContactsModel对象中的联系人数量，以获得联系人总数？

Answer 1

我能够解决这个问题：

public class Contacts_GetCount: AbstractIndexCreationTask<ClientContactsModel, Contacts_GetCount.ContactResult>
{
    public class ContactResult
    {
        public Guid ClientId { get; set; }
        public int Total { get; set; }
    }

    public Contacts_GetCount()
    {
        Map = contacts => from contact in contacts
            select new {
                ClientId = contact.ClientId,
                Total = contact.Contacts.Count
            };

        Reduce = results => from result in results
            group result by result.ClientId
            into g
            select new {
                ClientId = g.Key,
                Total = g.Sum(x=>x.Total)
            };
    }
}

我遗失的那篇文章是在文档的映射中将创建的匿名类型的集合计数。

如何编写索引以在RavenDB中跨文档获取集合中的对象总数？

1 个答案: