[英]JsonPath expression to filter using regex
We are using a tool which uses jayway library for evaluating JSONpath expression.我们正在使用一个工具,它使用 jayway 库来评估 JSONpath 表达式。 Javascript does NOT seem to work with it .
Javascript 似乎不适用于它。 How can I use regular expression in the JSONPath in such a case.
在这种情况下,如何在 JSONPath 中使用正则表达式。 For instance, in the below example I would like to filter all book titles whose title has the word "Sword" in it:
例如,在下面的示例中,我想过滤标题中包含“Sword”一词的所有书名:
{
"store": {
"book": [
{
"category": "reference",
"author": "Nigel Rees",
"title": "Sayings of the Century",
"price": 8.95
},
{
"category": "fiction",
"author": "Evelyn Waugh",
"title": "Sword of Honour",
"price": 12.99
},
{
"category": "fiction",
"author": "Herman Melville",
"title": "Moby Dick",
"isbn": "0-553-21311-3",
"price": 8.99
},
{
"category": "fiction",
"author": "J. R. R. Tolkien",
"title": "The Lord of the Rings",
"isbn": "0-395-19395-8",
"price": 22.99
}
],
"bicycle": {
"color": "red",
"price": 19.95
}
},
"expensive": 10
}
The Jayway implementation uses the Ruby regex operator: Jayway 实现使用 Ruby 正则表达式运算符:
$.store.book[?(@.title =~ /^.*Sword.*$/)]
To ignore case:忽略大小写:
$.store.book[?(@.title =~ /^.*sword.*$/i)]
For the record, a workaround for conditional regex in Goessner's javascript JSONpath would be to write the query as follow:作为记录,Goessner 的 javascript JSONpath 中条件正则表达式的解决方法是编写如下查询:
$.store.book[?(/^.*sword.*$/i.test(@.title))]
Please see here https://github.com/jpaquit/jsonpath/tree/0.8.5-+-regexp for "=~" syntax in JS lib.请在此处查看https://github.com/jpaquit/jsonpath/tree/0.8.5-+-regexp以了解 JS 库中的“=~”语法。
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