Function listByES

models/releate_book.go:89–117

Use ES to get the related books

(book *Book, length int)

// Use ES to get the related books
func listByES(book *Book, length int) (ids []int) {
	client := NewElasticSearchClient()
	client.IsRelateSearch = true
	client.Timeout = 3 * time.Second
	listRows := 13 // 这里要填 13，因为有可能返回的id恰好是本书的id
	keyWord := book.Label
	if len(keyWord) == 0 {
		keyWord = book.BookName
	}

	res, err := client.Search(keyWord, 1, listRows, false)
	if err != nil {
		beego.Error(err.Error())
		return
	}

	bookId := book.BookId
	for _, item := range res.Hits.Hits {
		if len(ids) >= length {
			break
		}
		if item.Source.Id == bookId || len(ids) == listRows-1 {
			continue
		}
		ids = append(ids, item.Source.Id)
	}

	return ids
}

// Get the related books directly from DB by SQL composed with Labels
func listByDBWithLabel(book *Book, length int) (ids []int) {