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How to show all grandchild records linked to multiple child records related to parent

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  • #16
    Re: How to show all grandchild records linked to multiple child records related to pa

    Originally posted by G Gabriel View Post
    You lost me at "FOB"..but I think I get the gist of what you are trying to do in generic terms and the answer is so simple and you don't have to xdlg anything:
    Link the parent to the child with a dummy expression which will evaluate to true at all times, which in turn will show all children and therefore all grandchildren..
    This should answer your question
    I don't think the intention is to see ALL grandchildren of ALL children - that just means the whole grand table (not in the French Quarter)
    But all grandchildren of selected children - linked by a parent

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    • #17
      Re: How to show all grandchild records linked to multiple child records related to pa

      Maybe I'm overlooking something, but this is still the obvious simplicity.
      Run a procedure to put the parent linking key (to child) also into a field in grandchild.
      A simple one==link from parent to grandchild.??

      Just once, then maintain (or update it periodically)

      Comment


      • #18
        Re: How to show all grandchild records linked to multiple child records related to pa

        Originally posted by SNusa View Post
        This would work, but what I need to do is keep the tables linked, without needing to update a "dummy field" in the grandchild table.
        We got our dummies confused here..
        I am not talking about adding a dummy field..no need to add anymore dummies..God knows we have plenty of those as it is..
        I am talking about linking with a dummy EXPRESSION..
        I didn't delve too much into your scenario as I am not quite clear on what you are trying to do and I am attributing that to chemical imbalances inside my head for the time being..
        Ray:
        Yes he can add another link to the grandchildren..but, as you know, the fewer the links in the set the better.

        Comment


        • #19
          Re: How to show all grandchild records linked to multiple child records related to pa

          Originally posted by G Gabriel View Post
          ...Yes he can add another link to the grandchildren..but, as you know, the fewer the links in the set the better.
          Originally posted by Ray in Capetown View Post
          Maybe I'm overlooking something, but this is still the obvious simplicity.
          Run a procedure to put the parent linking key (to child) also into a field in grandchild.
          A simple one==link from parent to grandchild.??

          Just once, then maintain (or update it periodically)
          Hi everyone;

          That's exactly what I am avoiding "needing to do", by doing it another way(s): I do not want to have to run ANY routines (other than a direct import) on the grandchild table (periodically to update a direct link to the top table in order to sync the table to the account holders.) Using the "middle" table allows me to create an indirect "pointer" to the child table. (So at any point, I can export all the data from the POS, and even replace that child table completely without loosing any previously established "links" from parent to grandchild. ~ Doing so overcomes/addresses the following scenario: This POS solution is a "cash based system" and in most instances there is no account holder data collected at time of sale. (Registering the customer fobs & creating an account is optional for the time being.) ~ And sometimes the key fobs are handed out to new "members" just prior to their first transaction.

          Hope that explains the reasoning better. I was trying to work & "entertain" (my parents were visiting) during the past few posts.... I'm sure my prior explanations were "sketchy" at best.

          Anyways, here are the ways I have come across thus far:
          • Deselecting "parent record only" on the browse. (This would work great, but you can't scroll down to see all the records as the browse won't scroll properly.)
          • Add a "dummy" direct link from parent to grandchild. (Necessitates updating and maintaining the grandchild table.)
          • Only display parent & child on main form. (Link to grandchild data on separate form that opens, built on an inverted set.)
          • Create an "inverted mapped table" and use this in place of the grandchild table using either Xdialog or the "Record List List Box." (Unless you're familiar with coding native Xdialog, you have to use the "list box method", which has some presentation limitations.)


          I listed these methods above hoping that someone might offer another possibility I am overlooking...
          The first scenario would have been "perfect." ~ But due to browse related scroll bugs, you can't scroll down (as necessary) to see all the records. ~ At present, #4 is the second best. (Although I wish I knew Xdialog, so that I could correctly create and embed a browse into a form Xdialog cotrol.)

          On a related/side note: I'm a little "distraught" knowing that Alpha can't/won't/hasn't provided a solution to AT LEAST scroll through the entire browse when the "parent records only" browse property is unchecked! The browse sees all the data, the "scroll navigation" just doesn't work... ~ If you open just the "stand-alone" (named browse) outside a form (although you can't scroll), you can vertically expand the window to see all the data!

          ~Seems to me that the browse object could be "tweaked" so that if it "knows" there is more data displaying outside the visible area (regardless of the vertical cursor location/index being reported back)... Then it needs to "keep on scrolling."

          Also: Just uncovered another annoyance (bug).... You can't duplicate mapped tables (based on .dbf's anyways.) I had seen this before, but forgotten about it. When you attempt to duplicate them, you end up with an empty dbf, and not a map. ~ "Swiss Cheese."
          Last edited by SNusa; 03-25-2013, 11:16 AM.
          Robert T. ~ "I enjoy manipulating data... just not my data."
          It's all about the "framework." (I suppose an "a5-induced" hard drive crash is now in order?)
          RELOADED: My current posting activity here merely represents a "Momentary Lapse Of Reason."

          Comment


          • #20
            Re: How to show all grandchild records linked to multiple child records related to pa

            Originally posted by G Gabriel View Post
            Ray:
            Yes he can add another link to the grandchildren..but, as you know, the fewer the links in the set the better.
            not adding one, removing the middle one, adding one field. Obtained from the parent, so it can therafter be dispensed for this purpose

            Comment


            • #21
              Re: How to show all grandchild records linked to multiple child records related to pa

              Originally posted by Ray in Capetown View Post
              not adding one, removing the middle one, adding one field. Obtained from the parent, so it can therafter be dispensed for this purpose
              Understood. But that would require additional maintenance on the import (grandchild) table. (to link the grandchildren to pre-existing registered accounts) ~ Not to mention that the grandchild table is (by far) the largest table, particularly since keyfob registration is optional.

              The linking (middle/child) table facilitates adding new data at any time..... Any any re-usage of a pre-registered & pre-issued keyfob (at POS) will automatically "be linked" to the parent table! ~ The only time an extra step is necessary (during import) is when during POS data import, where any "newly issued" keyfobs get added to the middle (child/connecting table) with the parent/child linking field set to "uncommitted" during import. (So that they may be tied into/added to a parent account at any/later point in time.) This method also keeps the grandchild table much more "independent."

              I should have mentioned this earlier: The reason this method "makes sense" (in this scenario) is that keyfob registration capability is an enhancement to an existing project. (Hence, keyfob registration is completely optional.) ~ Way back, I could have likely avoided "data normalization" and only kept a flat table. ~ Had I built it that way, I might have avoided the parent->child->grandchild set layout.
              Last edited by SNusa; 03-27-2013, 10:20 AM.
              Robert T. ~ "I enjoy manipulating data... just not my data."
              It's all about the "framework." (I suppose an "a5-induced" hard drive crash is now in order?)
              RELOADED: My current posting activity here merely represents a "Momentary Lapse Of Reason."

              Comment

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