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Multi-User Error Handling
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De
28/10/1998 09:48:01
Steve Goss
Aon Group Limited
London, Royaume Uni
 
 
À
28/10/1998 09:43:31
Information générale
Forum:
Visual FoxPro
Catégorie:
Autre
Divers
Thread ID:
00151511
Message ID:
00151535
Vues:
24
>>>>>>We are experiencing various errors when multiple users are adding records, specifically "Update Conflict" and "Uniqueness of x is violated". We are using optimistic row buffering and have an error routine that traps these errors. For the "Uniqueness" error we have coded a retry however we then get
>>>>>>"Table buffer for alias x contains uncommitted changes.".
>>>>>>
>>>>>>Has anyone got any ideas as to what were doing wrong, or any suggestions of a better way to handle these errors.
>>>>>>
>>>>>>Thanks.
>>>>>
>>>>>Do you have primary tag on your table? How do you generate this key for new records?
>>>>
>>>>We do have the field marked as a primary tag. It appears to be giving us the error on the Append Blank ie. two people have created a record on the table with a primary key of spaces.
>>>
>>>You should either generate key right from field default value procedure, or use INSERT INTO instead of APPEND BLANK.
>>
>>Thanks, I think ultimately we'll change to INSERTs, but in the short term I'll look into the field default value procedure. This will be the first time I've used them - is there anything I should look out for?
>
>Look at Tastrade sample.

Thanks for you help.
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