How to use multiple with_items using Ansible block module

Can we use multiple with_items in same task, in this example I'm using two with_items, the first one is to store values like net.ipv6.conf.all.disable_ipv6 = 1 and the second one is to get the data captured in the register variable data_captured

Using this way I have conflicts.

- name: Test with with_items
  block:
    - name: Searching several string
      command: grep -w "{{item}}" /root/test/sysctl.conf
      register: data_captured
      with_items:
      - 'net.ipv6.conf.all.disable_ipv6 = 1'
      - 'net.ipv6.conf.default.disable_ipv6 = 1'
      - 'net.ipv6.conf.lo.disable_ipv6 = 1'
      - 'vm.swappiness = 1'
    - assert:
        that:
          - "'net.ipv6.conf.all.disable_ipv6 = 1' in item.stdout"
          - "'net.ipv6.conf.default.disable_ipv6 = 1' in item.stdout"
          - "'net.ipv6.conf.lo.disable_ipv6 = 1' in item.stdout"
          - "'vm.swappiness = 1' in item.stdout"  
        success_msg: "Protocols are  defined in the file"
      with_item: '{{ data_captured.results }}'
  rescue:
    - name: Insert/Update /root/test/sysctl.conf
      blockinfile:
        path: /root/test/sysctl.conf
        block: |
          net.ipv6.conf.all.disable_ipv6 = 1
          net.ipv6.conf.default.disable_ipv6 = 1
          net.ipv6.conf.lo.disable_ipv6 = 1
          vm.swappiness = 1

Solution

You should use the sysctl module instead of working around it like that.

This will do what you want:

- name: ensure values are set correctly in sysctl
  ansible.posix.sysctl:
    name: '{{ item.name }}'
    value: '{{ item.value }}'
    state: present
    reload: yes
  loop:
    - name: 'net.ipv6.conf.all.disable_ipv6'
      value: '1'
    - name: 'net.ipv6.conf.default.disable_ipv6'
      value: '1'
    - name: 'net.ipv6.conf.lo.disable_ipv6'
      value: '1'
    - name: 'vm.swappiness'
      value: '1'

You might need to run ansible-galaxy collection install ansible.posix on your ansible-controller (where you run the ansible or ansible-playbook command) before running the playbook.

Additional notes:

Using with_* is discouraged, loop should be used instead (see docs)
Take a look at the lineinfile module, it would have what you needed if the sysctl module did not exist
The with_item on the assert is completely superfluous in your case, as you do not use {{ item }} in the task