Question

我试图将价值从一个json档案中删除。然而,我的档案具有无财产名称的价值。

The json file, name items. json, looks:

{
  "AQ_01_Availability": {
    "class": "org.openhab.core.items.ManagedItemProvider$PersistedItem",
    "value": {
      "groupNames": [
        "gAirQuality_01"
      ],
      "itemType": "Switch",
      "tags": [],
      "label": "Availability"
    }
  },
  "AQ_01_CO2": {
    "class": "org.openhab.core.items.ManagedItemProvider$PersistedItem",
    "value": {
      "groupNames": [
        "gAirQuality_01"
      ],
      "itemType": "Number",
      "tags": [],
      "label": "CO2"
    }
  },
  "AQ_01_Formaldehyde": {
    "class": "org.openhab.core.items.ManagedItemProvider$PersistedItem",
    "value": {
      "groupNames": [
        "gAirQuality_01"
      ],
      "itemType": "Number",
      "tags": [],
      "label": "Formaldehyde"
    }
  },
  "AQ_01_Humidity": {
    "class": "org.openhab.core.items.ManagedItemProvider$PersistedItem",
    "value": {
      "groupNames": [
        "gAirQuality_01"
      ],
      "itemType": "Number",
      "tags": [],
      "label": "Humidity",
      "category": "humidity"
    }
  }
}

页: 1 每一物体的名称将退回<代码>null。

我期望的结果是:

AQ_01_Availability
AQ_01_CO2
AQ_01_Formaldehyde
AQ_01_Humidity

I have never used jq nor am I too familiar with json. My assumption was a well-structured file, thinking that each object starts with, say, item_name.

Answer 1

JSON具有类似树木的等级。本案的最高一级(“root”)是一个目标。物体是一套关键数值。你们想提取这一最高目标的所有关键内容。提供两种功能,在阵列中提供这些钥匙:keys和keys_unsorted。差异:后者按输入文件中出现的顺序将所有钥匙归来,而后者则进一步划分了这些阵列。为了获得您的预期产出,用 。你们可以把这一职能和手段结合起来:


jq -r  keys_unsorted[]  items.json
# or
jq -r  keys[]  items.json

-raw-output(或-r) 旗帜将由此形成的JSON strings转换成原体。

Demo

友情链接