> Message: 8
>> Date: Thu, 9 Feb 2012 10:50:56 -0600
>> From: Ed Leafe <e...@leafe.com>
>> On Feb 9, 2012, at 10:28 AM, Vineet Deodhar wrote:
>>
>> > To make my question more clear, pl. consider the vfp cursor adapter.
>> > In the cursors added to data-environment, records are either updated or
>> > marked for deletion or appended.
>> > At the end, with just a single call, it takes care of the CRUD functions
>> > automatically.
>> >
>> > Whether such behaviour like vfp CA is possible here?
>>
>> Dabo works the same with one exception: deleting a record happens
>> immediately, whereas the other changes (append/update) are buffered. Those
>> changes exist in the local cursor's data, and when you call save(), they
>> are all written to the backend. Likewise, you can call cancel() to revert
>> those changes at any time before writing them with the save() call.
>>
>>
Digging-up an old thread again :)
I notice one difference between vfp CA & dabo:
Pl. do not think that I am showing-off shortcomings of dabo.
But I am trying to think how it can be made to suit my purpose.
Agreed that append & update are buffered.
But a single save() call would not be sufficient to save them at single shot
As we all know,
-- For handling the save of 'appended' records, we need to call new() first.
(no need for seek() & setFieldVal() )
-- For handling the save of 'updated' records, seek() & setFieldVal() are
required (of course).
-- For delete, seek() & delete() are required.
In vfp CA, no such extra work is necessary.
I am just wondering how this whole stuff can be achieved in dabo.
Thinking of adding flags to the records (dicts) for append/update/delete.
But not sure how to proceed
Any thoughts?
If you need buffered deletes, you will need to add a column to the
>> cursor's data that works like the VFP delete() flag. Then, in your
>> afterSave() code, find all the records with that flag set, and call
>> delete() on them.
>>
>>
>> -- Ed Leafe
>
>
For deletes, yes.
It is simple. But as I have written before, I am thinking of how to make
dabo understand whether to append/update/delete.
--- Vineet
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