I just loop through the fields...

for i := 0 to Q.FieldCount-1 do
Fields[i].ReadOnly := False;

We use mostly TIBOQuery, rather than TIB_, but I don't think this
affects the ReadOnlyness of ReadOnly.
We do not use persistent fields. All fields are created on opening the
query.


Roger Vellacott.



-----Original Message-----
From: Paul Hope [mailto:paulhope@...]
Sent: 05 June 2006 15:55
To: IBObjects@yahoogroups.com
Subject: RE: [IBO] Updating left outer join



Hi Roger

I think you are saying that if the Field ReadOnly is set back to false
then
it doesn't matter what is in UpdateSQL. I tried setting
FieldByName('').ReadOnly to false but it wont compile - ReadOnly is a
read-only property - how do you do yours?

I also tried putting 'select 1 from rdb$database' into UpdateSQL but it
makes the field ReadOnly. I had assumed that IBO looked for field names
in
the UpdateSQL and made those editable. It would be nice to get rid of
the
rec=-1.

Regards
Paul

> -----Original Message-----
> From: IBObjects@yahoogroups.com
> [mailto:IBObjects@yahoogroups.com] On Behalf Of Roger Vellacott
> Sent: 05 June 2006 15:07
> To: IBObjects@yahoogroups.com
> Subject: RE: [IBO] Updating left outer join
>
> Jason's release note for version 4.3Ac says the following:
>
> "I fixed a bug in the handling of TField objects in the
> InternalSetFieldData method. I thought I was checking the
> field's ReadOnly property to prevent the setting when
> appropriately but due to the way the variable reference scope
> was it was mistakenly reading the dataset's ReadOnly property
> instead. Thus, I was allowing fields marked as read only to
> be modified. It will now raise an exception as it should."
>
>
>
> In other words, previous versions did not mark joined fields
> as ReadOnly fields, so it was much easier to customise the
> update process, with separate DSQLs, code in the BeforePost
> event, etc etc. We now have to circumvent the new behaviour
> by routinely looping through all fields setting ReadOnly off
> in the AfterOpen event, but, even so, IBO seems to reimpose
> the ReadOnly properties from time to time. This makes it
> much more difficult to create a reliable system in which
> joined fields, or
> other normally "readonly" fields, are editable by the user.
>
>
>
> It used to be possible to make a computed field editable, and
> respond to user edits by updating the fields or the tables
> from which it was computed. This no longer works, as IBO
> will not allow ReadOnly to be switched off on computed
> fields. It will, however, allow editing of Calculated Fields.
>
>
>
> I can see the logic of setting ReadOnly on such fields by
> default - especially where joined tables are displayed in
> editable grids, but it would be much more stable for those of
> us who want to control the editing and updating process if we
> could switch this behaviour off - perhaps with a new property
> of TIB_Statement. Any chance of this Jason?
>
>
>
> By the way, we have an empty stored procedure called
> DO_NOTHING, so we can set EditSQL etc to say "EXECUTE
> PROCEDURE DO_NOTHING", in order to persuade IBO that the
> update has been completed. This would be much faster than
> your "where rec = -1".
>
>
>
> Roger Vellacott
>
> Passfield Data Systems Ltd.
>
>
>
>
>
> <?xml:namespace prefix = o ns =
> "urn:schemas-microsoft-com:office:office" />
>
> -----Original Message-----
> From: Paul Hope [mailto:paulhope@...]
> Sent: 05 June 2006 14:25
> To: IBObjects@yahoogroups.com
> Subject: RE: [IBO] Updating left outer join
>
>
> I solved it using OnCustomEdit and a separate DSQL. Problem was I
> could
> not edit the grid without the EditSQL in place, so I left it
> there and crippled it with 'where rec = -1'.
>
> This raises two questions
>
> Should IBO have supported what I was doing below?
>
> How do you use OnCustomEdit, make the grid editable and not
> have a crippled statement in the InsertSQL?
>
> Regards
> Paul
>
> > -----Original Message-----
> > From: IBObjects@yahoogroups.com
> > [mailto:IBObjects@yahoogroups.com] On Behalf Of Paul Hope
> > Sent: 05 June 2006 13:09
> > To: IBObjects@yahoogroups.com
> > Subject: RE: [IBO] Updating left outer join
> >
> > Hi Helen
> >
> >
> > > -----Original Message-----
> > > From: IBObjects@yahoogroups.com
> > > [mailto:IBObjects@yahoogroups.com] On Behalf Of Helen Borrie
> > > Sent: 05 June 2006 12:57
> > > To: IBObjects@yahoogroups.com
> > > Subject: Re: [IBO] Updating left outer join
> > >
> > > At 09:42 PM 5/06/2006, you wrote:
> > > >Hi
> > > >
> > > >I have this query connected to a grid
> > > >
> > > >select s.rec,s.shipment,s.whs,s.pid,s.qty,s.alloc,w.description
> > > >from (warehouses w left outer join shipment_allocations s
> > > > on s.whs=w.ref and s.shipment=:shipment and s.pid=:pid)
> > > >
> > > >in the EditSQL I have
> > > >
> > > >execute procedure shipment_alloc_edit(:shipment,:pid,:qty,:whs)
> > > >
> > > >:shipment comes from MasterParams and MasterSource :qty is
> > > entered in
> > > >the grid :pid is set in code AfterPrepare (ParamByName) :whs
> > > is one of
> > > >the fields extracted in the SQL
> > > >
> > > >When I look at the SQLMonitor I see that when the query is
> > > opened both
> > > >:shipment and :pid are correctly set. However when the
> > InsertSQL is
> > > >executed :shipment and :qty are set, but :pid and :whs are null.
> > > >
> > > >How can I persuade it to pick up :pid and :whs?
> > >
> > > Try improving the syntax for the main query:
> > >
> > > select s.rec,s.shipment,s.whs,s.pid,s.qty,s.alloc,w.description
> > > from warehouses w
> > > left outer join shipment_allocations s
> > > on s.whs=w.ref
> > > WHERE s.shipment=:shipment and s.pid=:pid
> > >
> > > Helen
> > >
> > That breaks it, I always want the grid populated with fields from
> > warehouses even when there is no data in shipment_allocations.
> > Changing it as you suggest returns no rows ;-(
> >
> > Regards
> > Paul
> >
>

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