JQ选择值包含字符串且值不为空的对象

Posted 2023-02-15

【中文标题】JQ选择值包含字符串且值不为空的对象

【英文标题】：JQ Select Objects Where Value Contains String And Value Not Null

【发布时间】：2019-11-03 12:55:28

【问题描述】：

尝试从 JSON 数组中选择值包含字符串且值不为空的对象。

期望的输出：

    
      "configurable": false,
      "property_reference": ".properties.blobstore_certificate",
      "property_type": "rsa_cert_credentials",
      "product_guid": "p-blah-29d4678e926cf2069871",
      "location": "ops_manager",
      "variable_path": "something",
      "issuer": "/C=US/O=Blah",
      "valid_from": "2019-01-16T19:55:11Z",
      "valid_until": "2021-01-16T19:55:11Z"
    

选择时：

  "certificates": [
    
      "configurable": false,
      "property_reference": ".properties.director_ssl",
      "property_type": "rsa_cert_credentials",
      "product_guid": "p-blah-29d4678e926cf2069871",
      "location": "ops_manager",
      "variable_path": null,
      "issuer": "/C=US/O=Blah",
      "valid_from": "2019-01-16T19:55:10Z",
      "valid_until": "2021-01-16T19:55:10Z"
    ,
    
      "configurable": false,
      "property_reference": ".properties.uaa_ssl",
      "property_type": "rsa_cert_credentials",
      "product_guid": "p-blah-29d4678e926cf2069871",
      "location": "ops_manager",
      "variable_path": null,
      "issuer": "/C=US/O=Blah",
      "valid_from": "2019-01-16T19:55:10Z",
      "valid_until": "2021-01-16T19:55:10Z"
    ,
    
      "configurable": false,
      "property_reference": ".properties.blobstore_certificate",
      "property_type": "rsa_cert_credentials",
      "product_guid": "p-blah-29d4678e926cf2069871",
      "location": "ops_manager",
      "variable_path": "something",
      "issuer": "/C=US/O=Blah",
      "valid_from": "2019-01-16T19:55:11Z",
      "valid_until": "2021-01-16T19:55:11Z"
    
  ]

使用：

curl blah | jq ' .certificates[] | select(.variable_path|test("thing"))'

获取：

jq: error (at <stdin>:0): null (null) cannot be matched, as it is not a string

我认为问题在于存在空值。我不确定如何在存在这些空值的情况下进行选择而不会出现错误。

【参考方案1】：

从考虑中删除null 值的一种方法是：

.certificates[] | select(.variable_path | strings | test("thing"))

你也可以考虑使用?，在这里可以这样使用：

.certificates[] | select(.variable_path | test("thing")?)

【讨论】：

如果我只使用| strings，它会返回包含字符串的对象，但测试管道似乎不起作用，所以我没有得到任何输出。

我已经仔细检查过了。你有没有抄错或放错括号？您是否尝试过这两种解决方案？