avoid double postings (2 posts)

  1. to_ul
    Posted 6 years ago #

    I want to build a blog with several authors. they enter some data, to post...first they have to fill out a custom field »isbn-no.«.
    Now here we go: i want the author to show, that there is already an article/posting about this isbn-no...is this possible to realize?

    thank you for reading...

  2. to_ul
    Posted 6 years ago #

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