如何在Ansible中使用jinja2时删除多余的花括号

Question

我正在使用jinja2模板和JSON(base.JSON(文件创建一个新的JSON列表。在迭代json文件时，输出具有额外的花括号，json文件不符合在json文件中具有hubs数组的条件。

strong文本

[
{
"ansible_loop_var": "item",
"item": {
"subnet": "192.168.127.0/24",
"useVpn": false
},
"json": {
"mode": "none"
},
"msg": "OK (unknown bytes)"

},
{
"ansible_loop_var": "item",
"item": {

"subnet": "192.168.128.0/24",
"useVpn": false
},
"json": {
"mode": "none"
},
"msg": "OK (unknown bytes)",
"pragma": "no-cache",
"redirected": false,
"server": "nginx/1.21.4",
"status": 200
},
{
"ansible_loop_var": "item",
"invocation": {
"module_args": {

"status_code": [
200
],

"validate_certs": false
}
},
"item": {
"name": "MGMT",
"networkId": "987654321",
"subnet": "1.1.1.1/28",
"useVpn": false
},
"json": {
"hubs": [
{
"hubId": "123456789",
"useDefaultRoute": false
}
],
"mode": "spoke",
"subnets": [
{
"localSubnet": "1.1.1.1/28",
"useVpn": false
}
]
},
"msg": "OK (unknown bytes)"
}
]

Jinja模板

[
{% for dict_item in base %}
{% if dict_item['json']['hubs'] is defined %}
{
"netid": "{{ dict_item['item']['networkId'] }}",
"mgmt-subnet": "{{ dict_item['item']['subnet'] }}",
"mode": "{{ dict_item['json']['mode'] }}",
{% if dict_item['json']['hubs'] is defined %}
"hubs": [
{% for item in dict_item['json']['hubs'] %}
{
"hubId": "{{ item['hubId'] }}",
"useDefaultRoute": {{ item['useDefaultRoute'] | lower}}
}{% if not loop.last %},
{% endif %}
{% endfor %}
],
{% endif %}
{% if dict_item['json']['subnets'] is defined %}
"subnets": [
{% for item in dict_item['json']['subnets'] %}
{
"localSubnet": "{{ item['localSubnet'] }}",
"useVpn": {{ item['useVpn'] | lower}}
}{% if not loop.last %},
{% endif %}
{% endfor %}
]
{% endif %}
{% endif %}
}{% if not loop.last %},
{% endif %}
{% endfor %}
]

当前输出JSON

[
},
},
{
"netid": "987654321",
"mgmt-subnet": "10.28.64.128/28",
"mode": "spoke",
"hubs": [
{
"hubId": "123456789",
"useDefaultRoute": false
}                        ],
"subnets": [
{
"localSubnet": "1.1.1.1/28",
"useVpn": false
}                       ]
}    ]

预期输出JSON在不包含数组的base.JSON上迭代时需要删除初始的额外花括号作为集线器

[
{
"netid": "987654321",
"mgmt-subnet": "10.28.64.128/28",
"mode": "spoke",
"hubs": [
{
"hubId": "123456789",
"useDefaultRoute": false
}                        ],
"subnets": [
{
"localSubnet": "1.1.1.1/28",
"useVpn": false
}                       ]
}    ]

Answer 1

您可以编写这个jinja2模板：只循环if dict_item['json']['hubs'] is defined

[
{% for dict_item in base if dict_item['json']['hubs'] is defined %}
{
"netid": "{{ dict_item['item']['networkId'] }}",
"mgmt-subnet": "{{ dict_item['item']['subnet'] }}",
"mode": "{{ dict_item['json']['mode'] }}",
"hubs": [
{%      for item in dict_item['json']['hubs'] %}
{
"hubId": "{{ item['hubId'] }}",
"useDefaultRoute": {{ item['useDefaultRoute'] | lower}}
}{% if not loop.last %},
{%  endif %}          
{%      endfor %}
],
{%          if dict_item['json']['subnets'] is defined %}
"subnets": [
{%      for item in dict_item['json']['subnets'] %}
{
"localSubnet": "{{ item['localSubnet'] }}",
"useVpn": {{ item['useVpn'] | lower}}
}{% if not loop.last %},
{% endif %}
{%      endfor %}
]
{%          endif %}
}{% if not loop.last %},
{% endif %}
{% endfor %}
]

结果：

[
{
"netid": "987654321",
"mgmt-subnet": "1.1.1.1/28",
"mode": "spoke",
"hubs": [
{
"hubId": "123456789",
"useDefaultRoute": false
}          
],
"subnets": [
{
"localSubnet": "1.1.1.1/28",
"useVpn": false
}                        ]
}    ]