问题描述
在开始之前，让我说我是 RavenDB 的新手.
Before I start let me say I am new to RavenDB.
我目前只是在评估它，并且正在使用 RavenDB-Build-616 版本.我已经运行了服务器，即我已经手动启动了Raven.Server.exe"，并有以下测试代码
I am just evaluating it at the moment, and am using the RavenDB-Build-616 build. I have the server running, that is I have manually started "Raven.Server.exe", and have the following test code
public class RavenFullTextSearchDemo
{
private DocumentStore documentStore;
private List<string> firstNames = new List<string>() { "John", "Peter", "Paul", "Sam", "Brendon" };
private List<string> lastNames = new List<string>() { "Simons", "Black", "Benson", "Jones", "Breckwell" };
private Random rand = new Random();
public RavenFullTextSearchDemo(DocumentStore documentStore)
{
this.documentStore = documentStore;
}
public void Run()
{
IndexCreation.CreateIndexes(typeof(RavenFullTextSearchDemo).Assembly, this.documentStore);
using (IDocumentSession session = documentStore.OpenSession())
{
//add some random Users
for (int i = 0; i < 5; i++)
{
string name = string.Format("{0} {1},",
firstNames[rand.Next(firstNames.Count)], lastNames[rand.Next(lastNames.Count)]);
User newUser = new User { Name = name };
session.Store(newUser);
}
session.SaveChanges();
//Seem to have to give it some time to persist??? Seems very odd
//If I take the following line out, I dont get any users back at all
Thread.Sleep(3000);
PrintCurrentUsers(session);
var searchName = firstNames[rand.Next(firstNames.Count)];
Console.WriteLine(string.Format("Looking for users with Name starting with '{0}'\r\n", searchName));
Console.WriteLine("Simple starts with");
foreach (var person in Queryable.Where(session.Query<User, User_ByName_FullTextSearch>(), x => x.Name.StartsWith(searchName)))
{
Console.WriteLine(person.Name);
}
Console.WriteLine("\r\n");
Console.WriteLine("Complex starts with");
IQueryable<User> query = session.Query<User, User_ByName_FullTextSearch>();
query = searchName.Split().Aggregate(query, (current, part) => current.Where(x => x.Name.StartsWith(part)));
foreach (var person in query)
{
Console.WriteLine(person.Name);
}
}
}
private void PrintCurrentUsers(IDocumentSession session)
{
IList<User> users = new List<User>();
Console.WriteLine("The current list of users is :\r\n");
foreach (User user in session.Query<User>().ToList())
{
Console.WriteLine(string.Format("UserName : {0}", user.Name));
}
Console.WriteLine("\r\n\r\n");
}
}
public class User_ByName_FullTextSearch : AbstractIndexCreationTask<User>
{
public User_ByName_FullTextSearch()
{
Map = users => from user in users
select new { user.Name };
Index(x => x.Name, FieldIndexing.Analyzed);
}
}
哪里会像这样调用
using (var documentStore = new DocumentStore { Url = documentStoreLocation, DefaultDatabase = "ravenTest-" + DateTime.Now.Ticks })
{
documentStore.Initialize();
RavenFullTextSearchDemo ravenFullTextSearchMessAround = new RavenFullTextSearchDemo(documentStore);
ravenFullTextSearchMessAround.Run();
}
发生了一些奇怪的事情，因为我似乎需要 Thread.Sleep 以便将新的 User 对象持久化到磁盘.如果我没有那个 Thread.Sleep 在那里，我永远不会在PrintCurrentUsers"方法调用中看到任何打印出来.
There is something weird going on, as I seem to need the Thread.Sleep in order for the new User objects to be persisted to disk. If I do not have that Thread.Sleep in there, I never see anything printed out in the "PrintCurrentUsers" method call.
这是我在没有 Thread.Sleep 的情况下得到的输出
This is the output I get with no Thread.Sleep
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++当前的用户列表是:
++++++++++++++++++++++++++++++++++++++++++++++++++++++++The current list of users is :
寻找姓名以'Paul'开头的用户
Looking for users with Name starting with 'Paul'
简单从保罗·琼斯，
复杂的开头保罗·琼斯，
Complex starts withPaul Jones,
虽然这是我使用 Thread.Sleep 获得的输出
Whilst this is the output I get with the Thread.Sleep
当前用户列表是:
用户名:保罗·布莱克，用户名:保罗·本森，用户名:保罗琼斯，用户名:彼得布莱克，用户名:保罗西蒙斯，
UserName : Paul Black,UserName : Paul Benson,UserName : Paul Jones,UserName : Peter Black,UserName : Paul Simons,
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
++++++++++++++++++++++++++++++++++++++++++++++++++++++++
寻找姓名以'Paul'开头的用户
Looking for users with Name starting with 'Paul'
简单从保罗·布莱克保罗·本森保罗·琼斯保罗·西蒙斯，
Simple starts withPaul Black,Paul Benson,Paul Jones,Paul Simons,
复杂的开头保罗·布莱克保罗·本森保罗·琼斯保罗·西蒙斯，
Complex starts withPaul Black,Paul Benson,Paul Jones,Paul Simons,
我做错了什么.我在其他地方还有一些其他代码可以插入一堆用户并立即获取它们，这似乎工作正常.
What am I doing wrong. I have some other code elsewhere that inserts a bunch of Users and gets them straight away, and that seems to work ok.
有什么线索吗?
推荐答案
用户正在被持久化，但索引在后台更新，您正在对索引进行查询(这是设计使然).请参阅:http://ravendb.net/docs/client-api/querying
The Users are being persisted, but the index is updated in the background, and you are querying against the index (this is by-design). See: http://ravendb.net/docs/client-api/querying
您可以告诉 Raven 等到所有陈旧数据都在查询中.
You can tell Raven to wait until all stale data is in the query.
查看此页面:http://ravendb.net/docs/client-api/querying/stale-indexes 有关如何等待索引更新的示例.(特别是，您需要将您的方法更改为:
See this page: http://ravendb.net/docs/client-api/querying/stale-indexes for an example of how to wait until the index is up to date. (Specifially, you need to change your method to:
private void PrintCurrentUsers(IDocumentSession session)
{
IList<User> users = new List<User>();
Console.WriteLine("The current list of users is :\r\n");
foreach (User user in session.Query<User>()
.Customize(x => x.WaitForNonStaleResults(TimeSpan.FromSeconds(5)))
.ToList())
{
Console.WriteLine(string.Format("UserName : {0}", user.Name));
}
Console.WriteLine("\r\n\r\n");
}
这篇关于RavenDB 保存到磁盘查询的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！