RE: Can't modify EO objects! ARGH! =(
RE: Can't modify EO objects! ARGH! =(
- Subject: RE: Can't modify EO objects! ARGH! =(
- From: "Albert Jagnow" <email@hidden>
- Date: Thu, 17 Jul 2003 16:59:55 -0500
- Priority: normal
- Thread-topic: Can't modify EO objects! ARGH! =(
I am confused by the pattern you list below. I have had more problems
doing insert before populate. For example suppose I have an application
that allows users to enter a list of expenses for reimbursement. Say
the user has entered 10 expenses, then clicks the link to add another.
They go to a page that has a form and a new Expense EO bound to the form
fields. The EO has been created but not inserted into the EC. If the
user decides they really did not want to add another expense and leaves
the page things work OK. However if the Expense EO had been inserted
the next time saveChanges is called, depending on how validation is
done, the save will either fail or insert a blank row because there is
an empty EO out there. I have never had a problem doing create,
populate, insert, save, as described above. Have I just been lucky, or
am I not understanding what you are talking about here. Can someone
elaborate on this issue.
--Albert
-----Original Message-----
From: Chuck Hill [mailto:email@hidden]
Sent: Thursday, July 17, 2003 12:36 PM
To: Goodbye Bill
Cc: WebObjects-Dev
Subject: Re: Can't modify EO objects! ARGH! =(
Goodbye Bill wrote:
> default EC. I then create a new "Member" object without
> inserting it into the EC. I populate the variables of
> the "Member" object, stick it into the EC
>
Klaxons and red flashing lights go on.
Don't do that! The pattern is:
1. Create
2. Insert
3. Populate
4. Save
See:
http://wodev.spearway.com/cgi-bin/WebObjects/WODev.woa/wa/Main?wikiPage=
EOFCommandments
Chuck
Goodbye Bill wrote:
> Could someone please tell me why I cannot destroy an object in the
database
> once it is loaded into the session?
>
> DETAILS:
> I have a two-step signup process for my web site. Users must create a
> "Signup Request" including their name and email address. A
confirmation
> code is then sent their email address. They must return to the site
and
> enter this confirmation code before their "Member" object will get
created.
>
> ISSUE:
> When the user returns to the site to enter their confirmation code, I
load
> the "Signup Request" object into a local object within the session
using the
> default EC. I then create a new "Member" object without inserting it
into
> the EC. I populate the variables of the "Member" object, stick it
into the
> EC, then attempt to save the "Member" object while blowing away the
"Signup
> Request" object. I have tried this as two separate commands and
together as
> one. The "Member" object always saves fine however I cannot do
anything
> with the "Signup Request" object.
>
> ERROR DETAILS FOLLOW:
> com.webobjects.eoaccess.EOGeneralAdaptorException:
> updateValuesInRowDescribedByQualifier --
> com.webobjects.jdbcadaptor.JDBCChannel method failed to update row in
> database
> at
>
com.webobjects.eoaccess.EODatabaseContext._exceptionWithDatabaseContextI
nfor
> mationAdded(EODatabaseContext.java:4658)
> at
>
com.webobjects.eoaccess.EODatabaseContext.performChanges(EODatabaseConte
xt.j
> ava:6365)
> at
>
com.webobjects.eocontrol.EOObjectStoreCoordinator.saveChangesInEditingCo
ntex
> t(EOObjectStoreCoordinator.java:411)
> at
>
com.webobjects.eocontrol.EOEditingContext.saveChanges(EOEditingContext.j
ava:
> 3128)
> at Session.SaveNewMember(Session.java:85)
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--
Chuck Hill email@hidden
Global Village Consulting Inc. http://www.global-village.net
Progress is the mother of all problems.
- G. K. Chesterton
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