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Double linking field value in child table

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  • Double linking field value in child table

    I noticed that one child table contains double linking field values. I would really like to know what could cause this behavior because the problem keeps coming back every now and then.

    I attached some screen prints to show the set and field rule settings I'm using. In my case four table's need to share the same adm_nr. Table one (adm) is the parent and the parent key is field “adm_nr” (auto increment is turned on). Table two, three and four are linked as a child to the parent with a “one to one” link type.

    The problem occurred in the second table “adm_bez”. Table two contains the linkfield “bz_adm_nr”. No field rules are specified. However there is a second field in this table with auto increment turned on. I don't believe this could cause the problem but I bring it up just in case.
    Last edited by werder101010; 03-26-2010, 06:48 AM.

  • #2
    Re: Double linking field value in child table

    Werder, the one to one link does not prevent the entry of multiple child table records.

    I see that the "duplicate" records are empty except for the link field itself. Is this typical?

    If this were me I'd study the data entry sequence to determine where my user is permitted to begin a second child table record. And then I'd change the sequence that this can never happen.

    Perhaps they're tabbing through the last field, causing Alpha to save the current record and the automatically begin a new record... and then they shift focus to something else that causes Alpha to save the new "empty" record?


    • #3
      Re: Double linking field value in child table

      Thanks for the directions Tom. I will look into the data entry sequence!

      I am afraid I'm a little confused about the purpose of a link field. Should the entry of multiple child table records not be prohibited at all times. If a link in a child table field exists more than once how does Alpha determine which one is the right one?


      • #4
        Re: Double linking field value in child table

        From the helps:

        If there are duplicate records, the duplicates are ignored. A one-to-one link forces a parent record to link to a single matching child record, regardless of how many matching child records exist in the child table. The order of the child records, along with the one-to-one link type (first, last, or closest) that you select, determines which child record matches a particular parent record.
        Review the help file topic "One to One Links" for more details.


        • #5
          Re: Double linking field value in child table

          I read this before but did not understand it. I now understand it better. Thanks for your input!