Question: How to set searchOptions to search keywords?

[Daotin]

Hi, I have a problem, can you help me. Thanks.

my doc is:

[
 {
    "name": "一路向北",
    "album": "十一月的萧邦",
    "lrc": [
      "倒视镜里的世界",
      "越来越远的道别",
      "你转身向背"
    ]
  }
]

when I search 倒视镜里的世界 , it can be matched. But when I search 倒视镜, It will not be match.

So, How can it be matched when searching for 倒视镜? Finally, I want to achieve the effect of full-text search.

I want use fuzzy to solve it, but I dont know how to set.

---

Part of the code is as follows (using Vue3):

const doc = [
 {
    "name": "一路向北",
    "album": "十一月的萧邦",
    "lrc": [
      "倒视镜里的世界",
      "越来越远的道别",
      "你转身向背"
    ]
  }
];

const miniSearch = shallowRef(
  new MiniSearch({
    idField: "name",
    fields: ["album", "lrc"],
    storeFields: ["name", "lrc"],
    searchOptions: {},
    extractField: (document, fieldName) => {
      if (Array.isArray(document[fieldName])) {
        return document[fieldName].join(" ");
      } else {
        return document[fieldName];
      }
    },
  })
)

miniSearch.value.addAll(doc);

// when click search
function handleSearch() {
  results.value = miniSearch.value.search('倒视镜')
}

Appreciate your help, Thanks :-)

[lucaong]

Hi @Daotin , If I understand correctly, what you want is prefix search:

const miniSearch = shallowRef(
  new MiniSearch({
    idField: "name",
    fields: ["album", "lrc"],
    storeFields: ["name", "lrc"],
    searchOptions: {
      prefix: true, // prefix search, “foo” matches “foobar”
      fuzzy: true // fuzzy search, “foo” matches “fox”
    },
    extractField: (document, fieldName) => {
      if (Array.isArray(document[fieldName])) {
        return document[fieldName].join(" ");
      } else {
        return document[fieldName];
      }
    },
  })
)

Does this meet your needs?

[Daotin]

Hi @lucaong, Maybe I didn't express clearly. for example, a string like 你转身向背, when I search 转身 ( The Key words in the middle of the whole sentence), I hope to be able to match. So, probably not the prefix search.

[lucaong]

Ah, I see. Then unfortunately MiniSearch by default does not offer this feature. The options allow to:

• Search only for exact match
• Search for prefix match (foo matches foobar)

• Fuzzy search, also called typo-tolerance: it matches strings within a given Levenshtein distance from the query.

  Searching in the middle of a word is generally not possible, but there are some strategies that can work. One possibility is to split each word in all its suffixes, and use prefix search, like explained here. The index would get bigger, but search would match also in the middle of words.

I hope this helps :)

[lucaong]

Here is a quick example of what I mean: https://jsbin.com/poloselexa/1/edit?js,console

In the example, I use processTerm to index all suffixes of length > 3 of each term, then apply prefix search. This results in matching also partial terms in the middle of words.

[Daotin]

OK. It works! Thank you and Have a great day. 😀

[lucaong]

Great to hear it helped :)