jq-选择具有给定键名的对象 [英] jq - select objects with given key name

问题描述

我有一个具有多个级别的任意结构，等等.我需要选择所有包含名为updateDate的键的对象.我如何用jq做到这一点?我想出了一种方法，但是当它访问必须被grep删除的叶子时，也会在无效数据类型上产生错误:

I've got an arbitrary structure with many levels, etc. I need to select all objects that contain a key named updateDate. How do I do that with jq? I came up with one way but it also produces errors on invalid data types when it visits a leaf which I have to grep out:

jq 'recurse(.[]) | has("updateDate")' | grep -Fv error

我不太了解如何检查类型或叶子，我怀疑有更简单的方法来实现我想要的吗?

I don't really understand how to also check for types or leaves and I suspect there is a simpler way to achieve what I want?

推荐答案

在1.4中，您可以:

jq '..|.updateDate?'

如果您坚持使用1.3，则可以使用更长的程序，如下所示:

If you're stuck with 1.3 you can use a longer program like so:

jq 'recurse(if type == "array" or type = "object" then .[] else empty end) | if type == "object" then .updateDate else empty end'

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