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The Alpha Software Forum Participation Guidelines

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Bonus TIPS for Successful Posting

Try a Search First
It is highly recommended that a Search be done on your topic before posting, as many questions have been answered in prior posts. As with any search engine, the shorter the search term, the more "hits" will be returned, but the more specific the search term is, the greater the relevance of those "hits". Searching for "table" might well return every message on the board while "tablesum" would greatly restrict the number of messages returned.

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Urgent Help Needed

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    #1

    Urgent Help Needed

    Hi,
    i�m using A5 since a few years now and everytime i discover new things .
    For example,the problem i�m having now is about a VideoRent app.
    I know that i can make an MovieId as "unique" so there is no duplicates.
    But you ever tried to make a simple Video Rent app ?
    Well,it�s normal that a guy want to watch again a movie he rented a year before,
    but when i put the MovieId i cannot choose if i want or not re-rent that movie.
    I mean there is no exeptions,if it is a duplicate record it does not accept the MovieId.
    Strange thing......
    So here i�m again asking for an help.
    Do you have some idea or tip about this matter ?

    Remember that i should have a message in the moment i insert the MovieId and then Enter,
    telling me something like this:
    "Thi movie was rented in "date",do you want to re-rent ?"
    "Yes" carry on
    "No" Abort

    Any help would be appreciate,without it i can�t go on in build my app.

    Thanks to all.

    Best regards from Claudio
    Tags: None
    #2
    RE: Urgent Help Needed

    Claudio,

    Bill gave you the answer in a previous message. Substitute your values for his model. If you cann't get it to work, post your expression giving table_name and index name, - though you can hardly miss with his formula.

    Msg ID: 56325
    Subject: RE: About duplicates
    Author: Bill Warner
    Date: 03-13-2002 08:51
    File:

    You might try this:

    IF exist(value,"table_name","index_name")
    ' message and/or code here

    In the EXIST function shown, VALUE is a value derived from the current record, such as CUST_ID+CODEID; INDEX_NAME is the name of the index in TABLE_NAME that will identify the buyer and product. For example, you might create an index (called INDEX_NAME in the example above) that would sort on CUST_ID+CODEID, to identify the customer and product, so you know if a specific customer bought a specific product.

    Comment

      #3
      RE: Urgent Help Needed

      Maybe i explained myself in bad english,i know and i�m sorry for that.
      The problem is that does�nt work,maybe i dont know where to put this formula and i dont know how to write the message.

      Thanks anyway.
      Claudio

      Comment

        #4
        RE: Urgent Help Needed

        Assuming you have a set in which the parent table is CUSTOMER, there is a one-many child (RENTALS), and a one-one link to RENTALS called MOVIES; also assuming that RENTALS has the fields MOVIEID and CUSTID in it.

        When a customer comes in, you find their name, and then put the movie in the embedded browse (RENTALS). You want a message to appear when they have already rented that movie.

        Here's the script:

        IF exist(movieid+custid,"tablename.dbf","movie_cust")
        ui_msg_box("REPEAT","You have already rented")
        'whatever code you want when there is a repeat
        END IF

        First, you can make the above a global script called REPEAT (or other name). Then go to the field rules for the set, click on EVENTS, find the movieid field in the one-many child, and put in the ONWROTE event:

        script_play("repeat")

        This should do it for you. good luck.

        Comment

          #5
          RE: Urgent Help Needed

          CV

          IF exist(value,"table_name","index_name")
          UI_MSG_BOX("Notice","You have previously rented this video")
          End IF

          Put the above script on the OnDepart event of a field on your form where you enter the Video name or number.

          You will need to create an index that combines CustomerID and VideoID.

          Tom

          Comment

            #6
            RE: Urgent Help Needed

            First of all i want to thank you all for your kindness and help.
            I thought the best thing to do is to send to you a little
            app (17 kb) like this we can understand more about my little
            problem.Hope you dont mind.

            Thanks again and i wait anciously for your comment.

            Best regards from Claudio.

            P.S.
            The app it�s just for formulas purpose.
            All the missing fields will be created in
            the existing tables only if i can solve the
            problems first.

            Comment

              #7
              RE: Urgent Help Needed

              Claudio,

              Here is one idea using the CanWrite event for the movie_id field in field rules. This may give you some ideas. I have added a logical field called "save_it" to the table. I added this to require a true value in this field to save the record. Without it, a user could press F9 with the cursor in the movie_id field and the record would save even if they pressed no on the message box. I added a default value for this field which initiallt sets the value to .F. and added a check to see if its value = .T. in the CanSave event for the table. It can be true only after the CanWrite event is completed.

              I also shortened your index names to 10 characters. Everytime I would save the table, Alpha would shorten the index names. It is a good idea to keep index names to 10 characters or less.

              Don't worry about your English. It is much better that my Portugese.

              Jerry

              Comment

                #8
                RE: Urgent Help Needed

                Thanks Jerry,i�ll try your ideas and i�ll let you know.
                Regards from Claudio

                Comment

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