收集后无法检索身份和标签在密码中放松
我正在处理一个非常复杂的查询，其中涉及一些展开和收集，并将不同类型的节点混合在一起。最后，我留下了一张地图列表。 当我返回列表时，我看到每个元素都有属性 identity、labels 和 properties。
但是，我似乎无法通过键 map_element.identity 检索 identity 和 labels 的值，也无法使用 <代码>map_element[“身份”]。 我尝试使用函数 ID 和 labels 但它给了我错误，该元素是地图而不是节点。
用于测试任何数据以了解我的意思的基本查询：
MATCH (a), (b)
WITH collect(a) + collect(b) as collected
UNWIND collected as unwinded
RETURN unwinded, unwinded.identity
您会注意到在 unwinded 列中，identity、labels 和 properties 存在，但是 unwinded.identity 为 null
I'm working on a pretty complex query which involves some unwinds and collects, and mixes together different types of nodes. At the end of it, I'm left with a list of maps.
When I just return the list, I see that each element has the attributes identity, labels, and properties.
However, I don't seem to be able to retrieve the value of identity and labels through the key, map_element.identity, nor with map_element["identity"].
I've tried using the functions ID and labels but it gives me the error that the element is a map and not a node.
Basic query to test on any data to see what I mean:
MATCH (a), (b)
WITH collect(a) + collect(b) as collected
UNWIND collected as unwinded
RETURN unwinded, unwinded.identity
You will notice that in the unwinded column, identity, labels, and properties are present, however unwinded.identity is null
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您是否尝试过
id(unwinded)和labels(unwinded)？Did you try
id(unwinded)andlabels(unwinded)?ID 函数相当于获取该身份属性：
https: //neo4j.com/docs/cypher-manual/current/functions/scalar/#functions-id
对于标签，它是相同的标签函数：
https://neo4j.com/docs/cypher-manual /current/functions/list/#functions-labels
ID function is the equivalence of getting that identity property:
https://neo4j.com/docs/cypher-manual/current/functions/scalar/#functions-id
For labels, it is the same labels function:
https://neo4j.com/docs/cypher-manual/current/functions/list/#functions-labels