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Posted: **Wed Sep 02, 2015 10:04 am**

Hi all,

its me again with funny issues

I have the main stack where I put the connection/disconnection on openStack/closeStack.

on openStack
connectDB
end openStack

then I want to close connection when the stack is closed so I have

Code: Select all

on closeStack
closeDatabaseConnection
end closeStack

Now the issue is I have couple of cards and some substacks but as soon as I close substackit will disconnect me from database because it will run closeStack that is on mainstack script.

So is there any function like on closeMainStack or to have:

if "only the particular name of the stack" is closed then closeconnection else do not close connection end if

The code that I need, must be on main stack script

In other words how can I close connection when the main stack is closed not substack

Posted: **Wed Sep 02, 2015 10:33 am**

Hi antrax13,

if "only the particular name of the stack" is closed then closeconnection else do not close connection end if

Yes you're right, you can check the name of stack like a condition
You can also use pass closestack if you want do something on closestack for the current stack and pass closestack

Best regards
Jean-Marc

Posted: **Wed Sep 02, 2015 10:44 am**

jmburnod wrote:Hi antrax13,

if "only the particular name of the stack" is closed then closeconnection else do not close connection end if
Yes you're right, you can check the name of stack like a condition
You can also use pass closestack if you want do something on closestack for the current stack and pass closestack

Best regards
Jean-Marc

could you help me with syntax because I have

Code: Select all

on closeStack
   if stack "TestingStack" is closed then
      answer "mainstack has been closed"
      --closeDatabaseConnection
   else
      answer "substack has been closed"
   end if
end closeStack

is giving me error stack "TestingStack": execution error at line 8 (Chunk: source is not a container), char 1 ===> Line 8 is if stack "TestingStack".....

Posted: **Wed Sep 02, 2015 10:53 am**

OK got it

Code: Select all

on closeStack
   put the short name of this stack into tStackName
   if tStackName is "TestingStack" then
      answer "mainstack has been closed"
      closeDatabase
   else
      answer "substack has been closed"
   end if
end closeStack

Posted: **Wed Sep 02, 2015 11:06 am**

Just checking with me colleague and he also suggested another solution to have empty

Code: Select all

on openStack
   
end openStack

on closeStack
   
end closeStack

on substacks

Posted: **Wed Sep 02, 2015 11:18 am**

Hi Antrax

the problem here is that when you close a substack the substack gets a message "closestack". Since the substack apparently does not handle this message the message travels along and finds in the message path the main stack, which has a closeStack handler.

If your substack includes a

Code: Select all

on closestack
end closestack

handler in the stack script the message would stop there and never reach the main stack.

Of course Jean-Marc's approach is perfectly alright and might in some circumstances be the only way. E.g. the mainstack has to do something when the substack closes.

This is just to remind you of the message path which can at times surprise

Kind regards
Bernd

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