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Using related fields in Alpha 5 grids.

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  • Using related fields in Alpha 5 grids.

    I wasn't terribly sure whether to start this in an Alpha 5 board or here in Database Design, but here seemed more relevant.

    I've an SQL Server database storing user details and expenses details in separate tables. There is a foreign key value, userid, in the expenses table which relates to the primary key value in the user table.

    In Alpha 5 I've built a grid which displays information from the expenses table, but the information shown needs to be sorted by a value stored on the user table.
    How do I accommodate the relationship between these two tables in Alpha 5? I need to be able to get at that value on the user table based on the userid in the expenses table.

    Apologies if it's a little vague; I'm lacking in knowledge a little!
    There are ways that I could go about this but I'm pretty sure they're all wrong and would involve a lot of data repetition.

    Thanks in advance!!

  • #2
    Re: Using related fields in Alpha 5 grids.

    why not a set based on user table and linked to expenses by userid. grid and browses give you all the columns in both tables allowing you to sort expenses on any field in the user table. grid could be customized to eliminate unwanted fields.


    • #3
      Re: Using related fields in Alpha 5 grids.

      Sets were one of the options I was aware of, but would I not be better doing an SQL JOIN based on the related field?


      • #4
        Re: Using related fields in Alpha 5 grids.


        You have several options here and I do recommend SQL based views over Alpha sets. A lot depends on what you mean by 'sorted' and whether the grid has to be editable or not.

        1. If your grid is not editable:
        - Create an SQL view, joined on userid and containing all the fields you require.
        - Create a grid on the view with a 'Search Part' for filtering sorting.

        2. If your grid has to be editable:
        - Create a read-only grid based on the user table containing all the fields you require.
        - Create an editable grid based on the expenses table
        - Add the 'expenses grid' to the 'user grid' as a Linked Content Section linked on user_id.

        There a few other permutations to this, such as using the OnGridExecute event to redefine the SQL query for the grid based on the content of a session variable. The session variable value could have been obtained from your user table.

        Hope it helps.