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Drawing Back Data from a Lookup Table In Grid

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    Drawing Back Data from a Lookup Table In Grid

    I have a field called CountryID in a transaction table that uses a lookup grid to get a value from the Country table.

    So far so good. However, I would like to display the CountryName field (e.g. Germany) that corresponds to the CountryID (e.g. GER) as a readonly field in the grid alongside it.

    My tables are in MySQL and I am not using active links. I don't want to add CountryName as a field to the transaction table - just show it alongside with the shorthand code whenever adding or viewing records.

    Any suggestions would be much appreciated.

    #2
    Re: Drawing Back Data from a Lookup Table In Grid

    Make the field a dropdown and use dynamic choices from your MySQL table that you connect to with your connection string. The Genie is straight forward, so hopefully you can sort it out. If you have 1000's of choices a lookup might be better.

    Comment


      #3
      Re: Drawing Back Data from a Lookup Table In Grid

      What if the grid for browsing the Transaction table were read-only and it was based on a VIEW on the server side that it JOINed with any needed lookup tables? This would put the burden of doing the lookup on MySQL instead of Alpha. A separate component would be used for updating records; it's source would be the Transaction table directly (or an updateable VIEW of the transaction table). It's an approach I was going to try with my app and I wonder if other people do it this way?

      Comment


        #4
        Re: Drawing Back Data from a Lookup Table In Grid

        I want this in the updateable detail section and am looking at drawing back the countryName whenever the user is either viewing or entering data. I no doubt will need separate connection strings for each but am at a loss as to how to do this. Linked grids don't achieve this as far as I can tell. This is one of many such fields I have in the table, e.g. there is NameID which needs to draw back the Name field from the Name table, and SourceID which draws back the SourceTitle from the Source field. Achieving the look up itself when entering is not a problem but showing the drawn back description of it alongside the field. Obviously I don't wish to include the detail in the transaction table itself as this would destroy the purpose of normalisation.

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          #5
          Re: Drawing Back Data from a Lookup Table In Grid

          Originally posted by RichCPT View Post
          What if the grid for browsing the Transaction table were read-only and it was based on a VIEW on the server side that it JOINed with any needed lookup tables? This would put the burden of doing the lookup on MySQL instead of Alpha. A separate component would be used for updating records; it's source would be the Transaction table directly (or an updateable VIEW of the transaction table). It's an approach I was going to try with my app and I wonder if other people do it this way?
          That is how I do it. It works very well for me. Very fast and smooth.
          Win 10 64 Development, Win 7 64 WAS 11-1, 2, Win 10 64 AA-1,2, MySql, dbForge Studio The Best MySQL GUI Tool IMHO. http://www.devart.com/dbforge/mysql/studio/

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            #6
            Re: Drawing Back Data from a Lookup Table In Grid

            thank you Frank, and Richard? I'm sorry I didn't grasp what you were saying - I am only one month into learning Alpha5 and though I'm making progress I'm still naturally a neophyte and am struggling a bit. I will post again when I have tried out your suggestions.

            Comment


              #7
              Re: Drawing Back Data from a Lookup Table In Grid

              Check out this video. http://www.screencast.com/t/lsNwsuJV8H0

              Comment


                #8
                Re: Drawing Back Data from a Lookup Table In Grid

                Thanks, Lee - that was exactly what I was looking for!
                Cheers,
                Simon

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