Show random article if category B has no published articles - Joomla! Forum - community, help and support

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is possible:

my categories , articles set this:
    - category has 2 subcategories: b , c
    - category b has either 0 or 1 articles published
    - category c has 3 articles published published

what want achieve this:
i want display 1 article in moduleposition x, no more, no less , these rules apply:
    - if category b has no published articles, show random article category c
    - if category b has published articles, show article

tried achieve newsflash module, didn't succeed yet. if needed can rearrange categories. adding code template option, don't know code. prefer solving without extensions.

[bump]

anyone? :(

thanks





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