Ansible jinja2将列表合并到单个列表 [英] Ansible jinja2 merging lists to a single list

问题描述

我正在尝试迭代列表["abc"，"def"，"ghi"]&每次迭代都会生成一个列表，我需要将其设置为ansible变量.

I am trying to iterate a list ["abc","def","ghi"] & each iteration generates a list which i need to set it to a variable in ansible.

这是我当前的脚本:

- name: add checks
  set_fact:
    CHECKS: "{% for cKey in checkKey %} {{ CHECKS|default([]) }} + {{ CHECKSMAP | map(attribute=cKey ) | list |join(',')}} {% endfor %}"

生成以下输出，该输出是字符串&不是列表，如何在for循环中附加到类似于list + = temp_list的单个列表

which generates the following output which is a string & not a list how can i append to the single list similar to list += temp_list in a for loop

ok: [127.0.0.1] => {
"msg": "System  [] + [{u'check': u'system_checks'}, {u'check': u'lms_server_health'}]  [] + [{u'check': u'system_checks'}, {u'check': u'config-service_server_health'}, {u'check': u'config-service_server_restart'}] "   }

推荐答案

生成以下输出，该输出是字符串&不是列表

which generates the following output which is a string & not a list

这是一个字符串，有两个原因:首先，您在表达式中间嵌入了" + "位文本，其次是因为您叫join(',')，而Jinja却按照您的要求高兴地完成了操作.

It's a string for two reasons: first off, you embedded a " + " bit of text in the middle of your expression, and the second is because you called join(',') and jinja cheerfully did as you asked.

如何在for循环中附加到类似于list + = temp_list的单个列表

how can i append to the single list similar to list += temp_list in a for loop

答案是完全按照您所说的做，并使用一个中间变量:

The answer is to do exactly as you said and use an intermediate variable:

CHECKS: >-
  {%- set tmp = CHECKS | default([]) -%}
  {%- for cKey in checkKey -%}
  {%-   set _ = tmp.extend(CHECKSMAP | map(attribute=cKey ) | list) -%}
  {%- endfor -%}
  {{ tmp }}

AFAIK ，您必须使用.extend技巧，因为set tmp = tmp +将在循环内声明一个新的tmp，而不是在循环外分配tmp

AFAIK, you have to use that .extend trick because a set tmp = tmp + will declare a new tmp inside the loop, rather than assigning the tmp outside the loop

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