Variable substitution in left side of expression

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Hello All,

I’m trying to re-use a task (by calling it for different purposes via include) so that I can substitute the values of one of module options.
So in one case I have dimension_name=“HealthyHostCount” and in another dimension_name=“BackendConnectionErrors” but it doesn’t work as I want.
It doesn’t throw error but “{{ dimension_name }}” is not substituted.

`

  • name: Create alarm
    ec2_metric_alarm:
    region: “{{ aws_region }}”
    …
    dimensions:
    “{{ dimension_name }}”: “{{ dimension_value }}”
    …
    state: “{{ state }}”

`

task 1:

`

  • name: Create alarm
    ec2_metric_alarm:
    region: “{{ aws_region }}”
    …
    dimensions:
    “HealthyHostCount”: “{{ dimension_value }}”
    …
    state: “{{ state }}”
    `

task 2:

`

  • name: Create alarm
    ec2_metric_alarm:
    region: “{{ aws_region }}”
    …
    dimensions:
    “BackendConnectionErrors”: “{{ dimension_value }}”
    …
    state: “{{ state }}”
    `

I want to avoid creation of 2 tasks like above with conditions rather use one tasks as I might have many possible values for “dimension_name” and the file become large and complex.
Is there any way to have a variable value substituted in left side?

Thanks,
Constantin