JSONPath: Difference between revisions
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====<tt>$</tt>==== | ====<tt>$</tt>==== | ||
[[#.24|$]] represents the [[JSON_Concepts#Top-Level_Element|top-level element]] (or root) of the JSON document. The "$" is optional, the following are equivalent: | |||
<syntaxhighlight lang='json'> | |||
$.metadata | |||
.metadata | |||
metadata | |||
<syntaxhighlight lang='json'> | |||
There are two ways to select a specific child element relative to the parent element: [[#.property|.''property'']] and [[#.5B0-based-index.5D|[''0-based-index'']]]. These two different syntaxes are applied to JSON [[JSON_Concepts#Objects|Objects]] and [[JSON_Concepts#Arrays|Arrays]], given the fact that JSON has only these two types of collections. | There are two ways to select a specific child element relative to the parent element: [[#.property|.''property'']] and [[#.5B0-based-index.5D|[''0-based-index'']]]. These two different syntaxes are applied to JSON [[JSON_Concepts#Objects|Objects]] and [[JSON_Concepts#Arrays|Arrays]], given the fact that JSON has only these two types of collections. | ||
Revision as of 00:07, 16 March 2021
External
- https://goessner.net/articles/JsonPath/
- https://github.com/json-path/JsonPath
- https://support.smartbear.com/alertsite/docs/monitors/api/endpoint/jsonpath.html
- https://github.com/jayway/JsonPath
Internal
Overview
JSONPath is a query language for JSON similar to XPath for XML. Some documentation describes it as a Java DSL for reading JSON documents, probably to address those cases where the implementation is made in Java.
Concepts
JSONPath Expression
A JSONPath expression specifies a path to an element or a set of elements that are part of a JSON document. An expression can be assembled using a series of syntax elements presented below.
$
$ represents the top-level element (or root) of the JSON document. The "$" is optional, the following are equivalent:
$.metadata
.metadata
metadata
<syntaxhighlight lang='json'>
There are two ways to select a specific child element relative to the parent element: [[#.property|.''property'']] and [[#.5B0-based-index.5D|[''0-based-index'']]]. These two different syntaxes are applied to JSON [[JSON_Concepts#Objects|Objects]] and [[JSON_Concepts#Arrays|Arrays]], given the fact that JSON has only these two types of collections.
====<tt>.''property''</tt>====
This is called "the dot notation" where a property of the parent JSON [[JSON_Concepts#Objects|Object]] is specified following a dot.
<syntaxhighlight lang='json'>
.metadata.resourceVersion