RE: [Zope] NEWBIE: assign next free ID automatically
This is untested, but an idea:
dtml-in "objectValues()[:-1]" sort=id reverse
dtml-call "REQUEST.set('new_id', id+1)"
dtml-var new_id
It is still subject to failure if 2 or more processes are writing an article
in the same time.
Furthermore it has to find and sort all the items in the folder. That could
take a long time if there are lots of them.
Maybe you should somehow insert a dtml-try until you succed in writing the
article.
Another aproach would be to have the folder with your articles have a
property "lastID" and let "nexID" be a method that automatically would
increment lastID end return it.
Maybe it is possible to lock the lastID property??
From: Patrick Koetter [mailto:[EMAIL PROTECTED]]
What is it that I want to do?
I want to evaluate the highest ID (all are 'int') within the folder and
assign the next highest.
I'm sure this is easy to you...
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Re: [Zope] NEWBIE: assign next free ID automatically
ola,
the below will should work fine, although the _string.atoi is unesc
since you can just use 0, or 1 by itself inside "" and have it treated
as an int and its a bit inefficient to use objectValues over objectIds
(list of objects vs. list of strings) although it saves you from having
to do a dtml-let doc_id=sequence-item to evaluate in pythonish "" dtml
although the code below makes it obvious it should also be stated that
ids are strings.
one caveat, i wouldn't count on the id naming sequence to nesc reflect
the order of the items, as an item maybe deleted etc and have new ones
created which replace them. if you've not going to be deleting items,
another possibility is
dtml-call "REQUEST.set(id, _.str(_.len(objectIds(['DTML
Document'])+1))"
another caveat, in a heavily hit site you're going to be generating id
errors(both methods) because one thread will commit a new doc while the
other tries a moment later to commit with the same id. hence the reason
why i would just use a random int like dtml-call "REQUEST.set(id,
_.str(_.whrandom.randint(0,100))"
kapil
jensebaer wrote:
Hi,
it is not tested but may it works
dtml-call "REQUEST.set('newid', _.string.atoi('0'))"
dtml-in "objectValues('DTML Document')"
dtml-if "_.int(id) = newid"
dtml-call "REQUEST.set('newid', _.int(id) + _.string.atoi('1'))"
/dtml-if
/dtml-in
Your new id is: dtml-var newid
may you have to use _.string.atoi(id) instead _.int(id)
Viel Glück
Jens
- Original Message -
From: "Patrick Koetter" [EMAIL PROTECTED]
To: [EMAIL PROTECTED]
Sent: Monday, October 16, 2000 2:59 AM
Subject: [Zope] NEWBIE: assign next free ID automatically
Hi,
I've been through the Guides, How-Tos and also some of the list-archives.
Though I am not a programmer I finally decided to ask that question to all
of you...
I want to give Users the possibility to add documents in a folder
things_to_do ;-).
so far so good ... Then I want to control the IDs simply by assigning an
ID
to their Form.
I found a few articles generating either randomIDs or calculating IDs from
ZopeTime().
What is it that I want to do?
I want to evaluate the highest ID (all are 'int') within the folder and
assign the next highest.
I'm sure this is easy to you...
If there's a RTFM-document I'd be glad to read that.
thanks,
p@rick
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[Zope] NEWBIE: assign next free ID automatically
Hi, I've been through the Guides, How-Tos and also some of the list-archives. Though I am not a programmer I finally decided to ask that question to all of you... I want to give Users the possibility to add documents in a folder things_to_do ;-). so far so good ... Then I want to control the IDs simply by assigning an ID to their Form. I found a few articles generating either randomIDs or calculating IDs from ZopeTime(). What is it that I want to do? I want to evaluate the highest ID (all are 'int') within the folder and assign the next highest. I'm sure this is easy to you... If there's a RTFM-document I'd be glad to read that. thanks, p@rick ___ Zope maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope-dev )
Re: [Zope] NEWBIE: assign next free ID automatically
Hi,
it is not tested but may it works
dtml-call "REQUEST.set('newid', _.string.atoi('0'))"
dtml-in "objectValues('DTML Document')"
dtml-if "_.int(id) = newid"
dtml-call "REQUEST.set('newid', _.int(id) + _.string.atoi('1'))"
/dtml-if
/dtml-in
Your new id is: dtml-var newid
may you have to use _.string.atoi(id) instead _.int(id)
Viel Glück
Jens
- Original Message -
From: "Patrick Koetter" [EMAIL PROTECTED]
To: [EMAIL PROTECTED]
Sent: Monday, October 16, 2000 2:59 AM
Subject: [Zope] NEWBIE: assign next free ID automatically
Hi,
I've been through the Guides, How-Tos and also some of the list-archives.
Though I am not a programmer I finally decided to ask that question to all
of you...
I want to give Users the possibility to add documents in a folder
things_to_do ;-).
so far so good ... Then I want to control the IDs simply by assigning an
ID
to their Form.
I found a few articles generating either randomIDs or calculating IDs from
ZopeTime().
What is it that I want to do?
I want to evaluate the highest ID (all are 'int') within the folder and
assign the next highest.
I'm sure this is easy to you...
If there's a RTFM-document I'd be glad to read that.
thanks,
p@rick
___
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** No cross posts or HTML encoding! **
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