deleteInstance not working !!

Hi,

I have a DCT with the following container structure:
<root-container location="contentpage" name="contentpage">
<container location="main" name="main">
<container location="metainformation" name="metainformation">
</container>
<container location="article" name="article"></container>
<container location="frontpage" name="frontpage"></container>
</container>
</root-container>

Now I want to delete the article and fronpage container upon creation of the DCR. The FormAPI code to achieve this, I thought will look something like this:

var sItem = IWDatacapture.getItem("/contentpage/main");
var l = sItem.getChildren();

for (var i=0; i<= (l.length -1); i++) {
//alert(l.getName());

if(l.getName() == "/contentpage/main/article") {
//alert(sItem.getChildren());
//alert("deletd: " + i);
var s = sItem.deleteInstance(i +1);
alert(s);
}
}

I know that the above example only tries to delete the article container, but s is always false, and the container never gets deleted !. What am I missing here ?

Regards
Vaqas

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Adam Stoller

Hi,

I have a DCT with the following container structure:
<root-container location="contentpage" name="contentpage">
<container location="main" name="main">
<container location="metainformation" name="metainformation">
</container>
<container location="article" name="article"></container>
<container location="frontpage" name="frontpage"></container>
</container>
</root-container>

Now I want to delete the article and fronpage container upon creation of the DCR. The FormAPI code to achieve this, I thought will look something like this:

var sItem = IWDatacapture.getItem("/contentpage/main");
var l = sItem.getChildren();

for (var i=0; i<= (l.length -1); i++) {
//alert(l.getName());

if(l.getName() == "/contentpage/main/article") {
//alert(sItem.getChildren());
//alert("deletd: " + i);
var s = sItem.deleteInstance(i +1);
alert(s);
}
}

I know that the above example only tries to delete the article container, but s is always false, and the container never gets deleted !. What am I missing here ?

Regards
Vaqas

Do the containers have any sub-elements within them (any 'items')? What do your commented-out alerts show when they aren't commented out?

Actually - having just re-looked at your code and looking at the FormAPI manual - deleteInstance is for deleting an instance of a replicant container - and your definition of the containers do not contain min/max values - so they are not replicant containers - which might explain why it isn't working...

vahu

Hi Ghoti,

How you doing :-).

Well to start with I have tried putting min="0" and max="1" default="1" on both the containers, but that didn't help much :-(.

As regards to whether the container consist of other items/containers, then yes, they have both items and containers, but as I am deleting the wrapper container then it should not be the problem, because one can also do that from the GUI, so it should be possible.

alert(l.getName()) shows the following:
1. /contentpage/main/metainformation
2. /contentpage/main/article
3. /contentpage/main/frontpage

alert(sItem.getChildren()) shows the following:
1. /contentpage/main/article

And alert(s) obviously promts false.

Either there is an error from IW's side on the deleteInstance method or in the documentation.

Regards
Vaqas

Adam Stoller

If I had an environment to play with I might try figuring this out - but I don't so I can't - so someone else will have to help you if you can't figure it out yourself. I still think there's an issue with regard to min/max attributes - that needs to be on the 'main' container if you are trying to delete an instance of 'sItem' - but it sounds more to me like you want the min/max attributes on the 'article' and/or 'frontpage' containers - and that you want to do

l.deleteInstance(1);

instead of

sItem.deleteInstance(i+1);

but I could be wrong as I'm not privy to your actual requirements and can only visualize what the code is / should be doing as opposed to testing it out.

vahu

Hi Ghoti,

Finally I got it to work. The solution came to me when I sat there looking at the DCR. Looking and looking.

var sItem = IWDatacapture.getItem("/contentpage/main/article");
var sBool = sItem.deleteInstance(1);
alert(sBool); (=true, this time).

This along with the fact that the container attempted to be deleted, must have a min="0" and max="1" attributes set. So your theory with the attributes on is valid.
I think if the attributes are not set IW internally do not compile the container into a replicant type (internally).

Anywayz it works now :-).

Regards
Vaqas