如何过滤Jinja中的字典? [英] How to filter dictionaries in Jinja?

问题描述

我有一个字典，其中包名是 key ，而一些细节的字典是 value :

I have a dictionary of packages with package-name being the key and a dictionary of some details being the value:

{
        "php7.1-readline": {
            "latest": "7.1.9-1+ubuntu14.04.1+deb.sury.org+1", 
            "origins": [
                "ppa.launchpad.net"
            ], 
            "version": "7.1.6-2~ubuntu14.04.1+deb.sury.org+1", 
            "www": "http://www.php.net/"
        }, 
        "php7.1-xml": {
            "latest": "7.1.9-1+ubuntu14.04.1+deb.sury.org+1", 
            "origins": [
                "ppa.launchpad.net"
            ], 
            "version": "7.1.6-2~ubuntu14.04.1+deb.sury.org+1", 
            "www": "http://www.php.net/"
        }, 
        "plymouth": {
            "version": "0.8.8-0ubuntu17.1"
        },
    ....
}

我想将以上内容简化为仅包含值具有latest属性的软件包的字典.

I'd like to reduce the above to a dictionary with only the packages, that have the latest-attribute in their values.

似乎json_query是要使用的过滤器，但我不知道语法.那里的例子似乎都是在字典的列表上运行的，而不是在同一个字典的 dictionaries 上运行的.

It would seem like json_query is the filter to use, but I can't figure out the syntax. The examples out there all seem to operate on lists of dictionaries, not dictionaries of same...

例如，如果我将上述字典输送"到json_query('*.latest')中，则会得到实际最新版本的列表:

For example, if I "pipe" the above dictionary into json_query('*.latest'), I get the list of the actual latest versions:

[
  "7.1.9-1+ubuntu14.04.1+deb.sury.org+1",
  "7.1.9-1+ubuntu14.04.1+deb.sury.org+1",
  "7.1.6-2~ubuntu14.04.1+deb.sury.org+1"
]

我该如何获取整个字典元素?

How can I get the entire dictionary-elements instead?

有希望吗?

推荐答案

使用dict2items过滤器

With dict2items filter ^{added in December 2017}, it is possible using native functionality:

- debug:
    msg: "{{ dict(pkg | dict2items | json_query('[?value.latest].[key, value.latest]')) }}"

结果:

"msg": {
    "php7.1-readline": "7.1.9-1+ubuntu14.04.1+deb.sury.org+1",
    "php7.1-xml": "7.1.9-1+ubuntu14.04.1+deb.sury.org+1"
}

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