TBO Question

I have a TBO that executes during 'doSave'

I would like to get the old value of an attribute and do some conditional logic based on the delta between the old and new values.

Is the code snipet below basically correct or is there another/better way to capture the 'old' data

...

String qualification = "custom_document where r_object_id = '" + this.getString('r_object_id') + "'";

IDfSysobject objClone = (IDfSysObject)getSession().getObjectByQualification(qualification);

newValue = this.getString('attr1');

oldValue = objClone.getString('attr1');

if (newVal != oldval) {

... do something ...

}

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Accepted answers

PanfilovAB

getObjectSession().getUncachedObject(getObjectId(), null)

All comments

DCTM_Guru

Where are you executing super.doSave()? Have you tried your code?

kmac5

super.doSave() is after this code, I haven't got around to implementeing it yet.

I was just hoping someone had done something similar before so I wouldn't head down the right path.

DCTM_Guru

As long as super.doSave() is after your code, then you should be fine.

gcampos

If the value is changed before the doSave() then you should capture it into a class variable on the TBO before it changes, to compare it later.

I don't remember right now but there must be an init() or initialize() method, or something like that which will allow you to capture the original value when the object is instantiated.

lastnitescurry

Gustavo Campos wrote:If the value is changed before the doSave() then you should capture it into a class variable on the TBO before it changes, to compare it later.I don't remember right now but there must be an init() or initialize() method, or something like that which will allow you to capture the original value when the object is instantiated.

The method is:

protected void init() throws DfException

PanfilovAB

getObjectSession().getUncachedObject(getObjectId(), null)

kmac5

Just a little follow up

Well, I tried all three ways and found some odd behavior with two of them.

The initial way I tried it, just re-retrieving the object from the repository didn't work everytime, sometimes it would pull the updated (not the original) metadata from the repository.

getSession().getObjectByQualification("...")

Grabbing the data in the init file worked correctly however I noticed that Webtop triggered multiple doSaves() and the data acquired in the init method never changes and caused the code to be fired multiple times. However I suspect with a little code tweaking that issue can be resolved. I think just updating the class variable when appropriate (before calling the super.doSave) would do it.

The final technique worked perfectly, with out having to tweak the code

getObjectSession().getUncachedObject(getObjectId, null);

The multiple doSave calls didn't cause any issues, it caught the changes the first time then updated itself so that the code wasn't re-run multiple times