如何使用Nest将带有数组值的设置属性添加到ES-index
本文关键字:设置 属性 添加 ES-index 数组 Nest 何使用 | 更新日期: 2023-09-27 18:18:21
"我正在尝试使用ElasticSearch及其NEST . net客户端创建自动完成搜索的索引。我正在遵循http://qbox.io/blog/an-introduction-to-ngrams-in-elasticsearch上的教程,并且在创建索引及其设置时遇到了问题。具体来说,我想用以下设置创建索引(首先直接从教程的TL;DR中获取):
PUT /test_index
{
"settings": {
"analysis": {
"filter": {
"edge_ngram_filter": {
"type": "edge_ngram",
"min_gram": 2,
"max_gram": 20
}
},
"analyzer": {
"edge_ngram_analyzer": {
"type": "custom",
"tokenizer": "standard",
"filter": [
"lowercase",
"edge_ngram_filter"
]
}
}
}
}
我的问题是我不知道如何使用NEST发送"filter": [ "lowercase", "edge_ngram_filter" ]
部分。我当前的尝试是这样的:
esclient.CreateIndex("test_index", s => s
.Settings(settings => settings
.Add("analysis.filter.edge_ngram_filter.type", "edge_ngram")
.Add("analysis.filter.edge_ngram_filter.min_gram", "2")
.Add("analysis.filter.edge_ngram_filter.max_gram", "20")
.Add("analysis.analyzer.edge_ngram_analyzer.type", "custom")
.Add("analysis.analyzer.edge_ngram_analyzer.tokenizer", "standard")
// Interesting part on the line below!
.Add("analysis.analyzer.edge_ngram_analyzer.filter", new string[] { "lowercase", "edge_ngram_filter" })
)
);
,但是JsonWriterException: "不支持的类型:System.String[]。使用JsonSerializer类来获取对象的JSON表示。路径settings.index。"。我试图简单地手动提供JSON数组(.Add("analysis.analyzer.edge_ngram_analyzer.filter", "[ '"lowercase'", "'edge_ngram_analyzer'" ]")
), JSON被转义为字符串。
NEST API提供了这样做的方法吗?
UpdateSettings(..)
有更愉快的语法来设置分析设置。
你可以这样处理你的情况:
client.UpdateSettings(s => s
.Index(indexName)
.Analysis(a => a
.TokenFilters(f => f.Add("edge_ngram_filter", new EdgeNGramTokenFilter
{
MinGram = 2,
MaxGram = 20
}))
.Analyzers(analyzer => analyzer.Add("edge_ngram_analyzer", new CustomAnalyzer
{
Tokenizer = "standard",
Filter = new List<string> {"lowercase", "edge_ngram_filter"}
}))));
记得在更新索引设置之前关闭index。
希望有帮助。
更新:您也可以在创建索引时实现这一点。不需要更新设置
client.CreateIndex(indexName, i => i
.Analysis(a => a
.TokenFilters(f => f.Add("edge_ngram_filter", new EdgeNGramTokenFilter
{
MinGram = 2,
MaxGram = 20
}))
.Analyzers(analyzer => analyzer.Add("edge_ngram_analyzer", new CustomAnalyzer
{
Tokenizer = "standard",
Filter = new List<string> {"lowercase", "edge_ngram_filter"}
}))));