Neo4j - ruby查询翻译

Question

我有一个小neo4j，它有两个节点类型: Author和Book。从作者到书籍的单一关系authored_book。我知道如何用名字和所有他从Ruby写的书来获得作者。但我不知道怎么用塞弗写同样的东西。下面是Ruby代码：

2.1.5 :183 > a = Author.find_by(name: 'Albert Camus')
 => #<Author name: "Albert Camus">
2.1.5 :184 > a.books.count
 => 24
2.1.5 :185 > a.books.first
 => #<Book title: "LA Peste (Folio Series: No. 42)">
2.1.5 :186 > a.books.last
 => #<Book title: "La Chute">
2.1.5 :187 >

需要知道怎么用Cypher写这个。

Answer 1

这就是你要的。找到，作者和所有的作者由书籍。把书的数量、藏书的数量、收藏的第一本书、收藏中的书尾和藏书中的最后一本书还给出。

match (a:Author {name: 'Albert Camus'})-[:AUTHORED_BOOK]->(b:Book)
return count(b) as Num
, collect(b.title) as Books
, head(collect(b.title)) as Head
, tail(collect(b.title)) as Tail
, last(collect(b.title)) as Last
, collect(b.title)[length(collect(b))-1] as Last2