Can we disable parameter with respect to another parameter in cloudformation

Question

Is there any way by which we can disable certain parameters if a user enters a certain value in preceding parameters. For example

    dbUseExisitngParamGroup:
        Type: String
        Description: Enable or disable custom DB Parameter Group
        Default: 'false'
        AllowedValues:
          - true
          - false      
    dbExisitngParamGroupName:
        Type: String
        Description: Name of custom DB Parameter Group that you want for this RDS.
    dbNewParamsGroupFamilyName:
        Type: String
        Description: Set this value if to a valid param family if you want to create a new ParamGroup for this DB.
        Default: 'aurora5.6'

If I enter false in "dbUseExisitngParamGroup" parameter then "dbExisitngParamGroupName" parameter should gets disable for the user to enter any value

Answer 1

No.

But you can add conditions to your resources so that if dbUseExisitngParamGroup is supplied, dbExisitngParamGroupName is ignored.