Question

如标题中所述，当我尝试从csv文件读取并且仅想读取“名称”列时，“列表对象”没有属性“名称”错误。

我的csv：

name,uid,gid,password
eg1,1,2,password
eg2,1,2,password

我遵循了Ansible官方文档。

我的可笑剧本：

---
- hosts: localhost
  become: yes
  become_method: sudo
  become_user: root
  tasks:
    - name: read from CSV
      read_csv:
        path: user-creation.csv
      register: users

    - debug:
        msg: "{{users.list.name}}"

我得到的错误：

fatal: [localhost]: FAILED! => {"msg": "The task includes an option with an undefined variable. The error was: 'list object' has no attribute 'name'\n\nThe error appears to be in '/root/ansible/main.yml': line 12, column 7, but may\nbe elsewhere in the file depending on the exact syntax problem.\n\nThe offending line appears to be:\n\n\n    - debug:\n      ^ here\n"}

我到处都有Google搜索，似乎大多数人都不使用此模块，或者他们在使用该模块时没有这个问题。

Answer 1

可以使用json_query。下面的任务

- debug:
    msg: "{{ users.list|json_query('[*].name') }}"

给予

"msg": [
    "eg1", 
    "eg2"
]

Answer 2

知道了

- name: read from CSV
  read_csv:
    path: user-creation.csv
  register: users

- debug:
    msg: "{{ item.name }}"
  with_items:
    - "{{ users.list }}"

输出：

ok: [localhost] => (item={'name': 'eg1', 'uid': '1', 'gid': '2', 'password': 'password'}) => {
    "msg": "eg1"
}
ok: [localhost] => (item={'name': 'eg2', 'uid': '1', 'gid': '2', 'password': 'password'}) => {
    "msg": "eg2"

附带说明；如果您确实沉迷于此类任务，则可以使用例如awk实现您的目标。

严重错误：使用read_csv模块时，“列表对象”没有属性“名称”

2 个答案: