gatsby plugin elasticlunr search

Gatsby 搜尋插件

該插件支援透過 elastic lunr 進行搜尋整合。內容被索引，然後透過 graphql 重新產生elasticlunr索引。從那裡，可以針對該索引進行查詢，以透過頁面 ID 檢索頁面。

入門

透過npm install -D @andrew-codes/gatsby-plugin-elasticlunr-search安裝插件。有關更具體的實作細節，請參閱演示網站儲存庫。

接下來，更新您的gatsby-config.js檔案以使用該插件。

在gatsby-config中設置

 module . exports = {
    plugins : [
        {
            resolve : `@andrew-codes/gatsby-plugin-elasticlunr-search` ,
            options : {
                // Fields to index
                fields : [
                    'title' ,
                    'keywords' ,
                ] ,
                // How to resolve each field's value for a supported node type
                resolvers : {
                    // For any node of type MarkdownRemark, list how to resolve the fields' values
                    MarkdownRemark : {
                        title : node => node . frontmatter . title ,
                        keywords : node => node . frontmatter . keywords ,
                    } ,
                } ,
            } ,
        } ,
    ] ,
} ; 

在您的網站上消費

序列化搜尋索引將透過 graphql 提供。查詢後，元件可以使用從 graphql 查詢檢索到的值來建立新的彈性 lunr 索引。可以針對水合搜尋索引進行搜尋查詢。結果是文檔 ID 的陣列。給定文檔 ID，索引可以傳回完整文檔

 import React , { Component } from 'react' ;
import { Index } from 'elasticlunr' ;

// Graphql query used to retrieve the serialized search index.
export const query = graphql `query
SearchIndexExampleQuery {
    siteSearchIndex {
      index
    }
}` ;

// Search component
export default class Search extends Component {
    constructor ( props ) {
        super ( props ) ;
        this . state = {
            query : `` ,
            results : [ ] ,
        } ;
    }

    render ( ) {
        return (
            < div >
                < input type = "text" value = { this . state . query } onChange = { this . search } / >
                < ul >
                    { this . state . results . map ( page => (
                        < li >
                            { page . title } : { page . keywords . join ( `,` ) }
                        < / li >
                    ) ) }
                < / ul >
            < / div >
        ) ;
    }

    getOrCreateIndex = ( ) => this . index
        ? this . index
        // Create an elastic lunr index and hydrate with graphql query results
        : Index . load ( this . props . data . siteSearchIndex . index ) ;

    search = ( evt ) => {
        const query = evt . target . value ;
        this . index = this . getOrCreateIndex ( ) ;
        this . setState ( {
            query ,
            // Query the index with search string to get an [] of IDs
            results : this . index . search ( query )
                // Map over each ID and return the full document
                . map ( ( {
                ref ,
                } ) => this . index . documentStore . getDoc ( ref ) ) ,
        } ) ;
    }
}