使用Elasticsearch .NET和NEST 6.x :如何从多个索引中MultiGet文档
使用Elasticsearch .NET和NEST 6.x :如何从多个索引中MultiGet文档
提问于 2018-06-25 22:46:44
var ids = new Dictionary<string, List<string>>();
ids["Topic"] = new List<string> {"KL7KJ2QBWD77yvpxyjvd", "374wJ2QBWD77yvpxDjpX", "B7499GMBWD77yvpxFzgW"};
ids["Prod"] = new List<string>();
ids["Account"] = new List<string>();我做了这个流畅的嵌套查询：
var results = client.MultiGet(m =>
m.Index("topics").GetMany<Topic>(ids["Topic"])
.Index("prods").GetMany<Prod>(ids["Prod"])
.Index("accounts").GetMany<Account>(ids["Account"])它正在生成下面的请求。我们看到请求只使用了最后一个索引集，即"accounts“(这不是我需要的)：
http://localhost:9200/accounts/_mget?pretty=true
{
"docs": [
{
"_type": "Topic",
"_id": "KL7KJ2QBWD77yvpxyjvd"
},
{
"_type": "Topic",
"_id": "374wJ2QBWD77yvpxDjpX"
},
{
"_type": "Topic",
"_id": "B7499GMBWD77yvpxFzgW"
}
]
}
# Response:
{
"docs" : [
{
"_index" : "accounts",
"_type" : "Topic",
"_id" : "KL7KJ2QBWD77yvpxyjvd",
"found" : false
},
{
"_index" : "accounts",
"_type" : "Topic",
"_id" : "374wJ2QBWD77yvpxDjpX",
"found" : false
},
{
"_index" : "accounts",
"_type" : "Topic",
"_id" : "B7499GMBWD77yvpxFzgW",
"found" : false
}
]
}事实上，我想在流畅的嵌套中创建以下(有效的) Elasticsearch查询请求(没有特定的索引)：
http://localhost:9200/_mget?pretty=true
{
"docs": [
{
"_index": "topics",
"_type": "Topic",
"_id": "KL7KJ2QBWD77yvpxyjvd"
},
{
"_index": "topics",
"_type": "Topic",
"_id": "374wJ2QBWD77yvpxDjpX"
},
{
"_index": "topics",
"_type": "Topic",
"_id": "B7499GMBWD77yvpxFzgW"
}
]
}在fluent NEST中，有没有一种方法可以为每个ids列表指定每个索引/类型？
当然，如果我将特定的if添加到if“Prod”和if“Account”，这将为这些生成正确的if……例如：
http://localhost:9200/_mget?pretty=true
{
"docs": [
{
"_index": "topics",
"_type": "Topic",
"_id": "KL7KJ2QBWD77yvpxyjvd"
},
{
"_index": "prods",
"_type": "Prod",
"_id": "xxxxx"
},
{
"_index": "accounts",
"_type": "Account",
"_id": "yyyyy"
}
]
}回答 1
Stack Overflow用户
回答已采纳
发布于 2018-06-26 07:13:30
每个GetMany<T>(...)接受第二个参数，该参数是一个委托，用于进一步描述调用，包括提供索引名称
var ids = new Dictionary<string, List<string>>
{
{ "Topic", new List<string> { "topic1", "topic2", "topic3" } },
{ "Prod", new List<string> { "prod1", "prod2", "prod3" } },
{ "Account", new List<string> { "account1", "account2", "account3" } }
};
var multiGetResponse = client.MultiGet(m => m
.GetMany<Topic>(ids["Topic"], (op, id) => op
.Index("topics")
)
.GetMany<Prod>(ids["Prod"], (op, id) => op
.Index("prods")
)
.GetMany<Account>(ids["Account"], (op, id) => op
.Index("accounts")
)
);这会导致如下的请求
POST http://localhost:9200/_mget
{
"docs": [
{
"_index": "topics",
"_type": "topic",
"_id": "topic1"
},
{
"_index": "topics",
"_type": "topic",
"_id": "topic2"
},
{
"_index": "topics",
"_type": "topic",
"_id": "topic3"
},
{
"_index": "prods",
"_type": "prod",
"_id": "prod1"
},
{
"_index": "prods",
"_type": "prod",
"_id": "prod2"
},
{
"_index": "prods",
"_type": "prod",
"_id": "prod3"
},
{
"_index": "accounts",
"_type": "account",
"_id": "account1"
},
{
"_index": "accounts",
"_type": "account",
"_id": "account2"
},
{
"_index": "accounts",
"_type": "account",
"_id": "account3"
}
]
}已通过小写从CLR POCO名称推断出"_type"名称，这可以由overriding the type name inferrer on Connection Settings.更改
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原文链接：
https://stackoverflow.com/questions/51026230
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