如何将包含布尔值的CSV导入Neo4j

Question

我目前正在尝试使用Cypher将CSV数据导入Neo4j.

不幸的是,我找不到将某个列(true/false)从String转换为Boolean的方法.当使用例如Case-When构造时,布尔值用于决定是否应该创建节点.

因此我的问题是:我做错了什么？

这是数据:

"UUID", "Name", "IsSelectable"
"1", "Abc", 1
"2", "Def", 0

而cypher声明:

LOAD CSV WITH HEADERS FROM 'file:///<path>' AS row
CREATE (:Category {UUID: row.UUID, Name: row.Name, IsSelectable: ???})

非常感谢奥利弗

Answer 1

您可以使用CASE WHEN THEN ELSE END表达式.

请参阅密码参考卡:http://neo4j.com/docs/stable/cypher-refcard

LOAD CSV WITH HEADERS FROM 'file:///<path>' AS row
CREATE (:Category {UUID: row.UUID, Name: row.Name, 
       IsSelectable: (case row.IsSelectable when 1 then true else false end)})

Answer 2

您可以使用toBoolean将 1/0 转换为 true/false

LOAD CSV WITH HEADERS FROM 'file:///<path>' AS row
CREATE (:Category {
    UUID: row.UUID, 
    Name: row.Name, 
    IsSelectable: toBoolean(row.IsSelectable)
})