[Zope] Lists and external methods

[Tony McDonald]

Oleg,
Thanks for that. It's the clearest explanation I've seen as to what 
'mapping' does (and I've read the docs a fair bit)
cheers
tone.

At 1:00 pm +0000 4/7/00, Oleg Broytmann wrote:
>On Tue, 4 Jul 2000, Pieter Claerhout wrote:
>>  I want the external method to return this in a list, where I can 
>>iterate over using the
>>  <dtml-in> tag, so that I can reference the different fields in 
>>each record with a name.
>>
>>  What should the list look like so that I can accomplish this?
>
>    dtml-in eats a list of objects or a list of dictionaries.
>
>Example 1.
>
>class Item:
>    pass
>
>    Your external methods should return:
>
>l = []
>
>item1 = Item()
>item1.date = "21/12/67"
>item1.foo = "bar"
>l.append(item1)
>
>item2 = Item()
>item2.date = "1/1/2000"
>item2.foo = "baz"
>l.append(item2)
>
>    ...etc...
>
>return l
>
>    In the DTML use the list: <dtml-in thelist><dtml-var 
>date></dtml-in thelist>
>
>
>Example 2 (dictionaries).
>
>    Your external methods should return:
>
>l = []
>
>item1 = {}
>item1["date"] = "21/12/67"
>item1["foo"] = "bar"
>l.append(item1)
>
>item2 = {}
>item2["date"] = "1/1/2000"
>item2["foo"] = "baz"
>l.append(item2)
>
>    ...etc...
>
>return l
>
>    In the DTML use the list: <dtml-in thelist mapping><dtml-var 
>date></dtml-in thelist>
>                                               ^^^^^^^
>    dtml-in needs to be notified these are dicttionaries.
>
>Oleg.            (All opinions are mine and not of my employer)
------
Dr Tony McDonald,  FMCC, Networked Learning Environments Project 
http://nle.ncl.ac.uk/
The Medical School, Newcastle University Tel: +44 191 222 5888
Fingerprint: 3450 876D FA41 B926 D3DD  F8C3 F2D0 C3B9 8B38 18A2