在Elasticsearch中映射具有多层，嵌套与父子关系的书籍

Z时代
2024-01-10
分类：问答

在为可以搜索多本书的索引创建映射时，最好使用如下所示的嵌套映射，或者使用具有父子关系的文档

book: {
  properties: {
    isbn:     {       //- ISBN of the book
      type: 'string'  //- 9783791535661
    },
    title:    {       //- Title of the book
      type: 'string'  //- Alice in Wonderland
    },
    author:   {       //- Author of the book(maybe should be array)
      type: 'string'  //- Lewis Carroll
    },
    category: {       //- Category of the book(maybe should be array)
      type: 'string'  //- Fantasy
    },
    toc: {            //- Array of the chapters in the book
      type: 'nested',
      properties: {
        html: {           //- HTML Content of a chapter
          type: 'string'  //- <!DOCTYPE html><html>...</html>
        },
        title: {          //- Title of the chapter
          type: 'string'  //- Down the Rabbit Hole 
        },
        fileName: {       //- File name of this chapter
          type: 'string'  //- chapter_1.html
        }, 
        firstPage: {      //- The first page of this chapter
          type: 'integer' //- 3
        }, 
        numberOfPages: {  //- How many pages are in this chapter
          type: 'integer' //- 27
        },
        sections: {       //- An array of all of the sections within a chapter
          type: 'nested',
          properties: {
            html: {           //- The html content of a section
              type: 'string'  //- <section>...</section>
            },
            title: {          //- The title of a section
              type: 'string'  //- section number 2 or something
            },
            figures: {        //- Array of the figures within a section
              type: 'nested',
              properties: {
                html: {           //- HTML content of a figure
                  type: 'string'  //- <figure>...</figure>
                },
                caption: {        //- The name of a figure
                  type: 'string'  //- Figure 1
                },
                id: {             //- Id of a figure
                  type: 'string', // figure4
                }
              }
            },
            paragraphs: {     //- Array of the paragraphs within a section
              type: 'nested',
              properties: {   
                html: {           //- HTML content of a paragraph
                  type: 'string', //- <p>...</p>
                }
                id: {             //- Id of a paragraph
                  type: 'string', // paragraph3
                }
              }
            }
          }
        }
      }
    }
  }
}

整个书籍html的大小约为250kB。我想查询诸如

- the best matching paragraph including it's nearest paragraphs on either side - the best matching section from a single book including any child sections - the best figure given it is inside a section with a matching title - etc

我真的不知道我想执行的查询的细节，但是具有很大的灵活性以便能够尝试非常怪异的查询而不必过多更改所有映射非常重要。