elasticsearch - Searching for a term as both a single string and multi worded string

Question

I'm setting up my elastic instance in a schema-less manner (no up front mappings) and the application requires users be able to search against a field that contains a word that may or may not be tokenized into multiple strings. For example, the field may contain the word "ONETWO". The spec requires that a user should be able to search "ONETWO", "ONE", and "TWO" and retrieve that same document. There doesn't seem any easy way to accomplish this even with a custom tokenizer (and I don't think there SHOULD be an easy way to do this -- or any way at all). Just want to confirm my thoughts.

标签： elasticsearch

Answer 1

使用使用n-gram 标记器的自定义分析器很容易满足您的要求，您甚至可以将其传递给小写标记过滤器，这样在您的情况下，即使您的文本也是如此，ONETWO但如果用户搜索one, One，ONE他应该得到一个结果。尽管为此您需要应用不同的分析器搜索时间，但请阅读有关它的更多信息 https://www.elastic.co/guide/en/elasticsearch/reference/current/search-analyzer.html。

有关更多信息，请参阅https://devticks.com/how-to-improve-your-full-text-search-in-elasticsearch-with-ngram-tokenizer-e346f29f8ddb，如果您需要任何信息，请告诉我。