> Message: 8

>> Date: Thu, 9 Feb 2012 10:50:56 -0600

>> From: Ed Leafe <ed@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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