[Zope-dev] How to aquire from Context?
Dear All, I have been trying to work out how to acquire a DTML method first by context rather than by containment. According to the ZDG (Great read, thanks guys!): -- snip -- Containment Before Context If in the example above suppose both a and b have an color attribute: a=C(a) a.color=green a.b=C(b) a.b.color=red a.x=C(x) print a.b.x.color # prints green Why does a.b.x.color acquire color from a and not from b? The answer is that acquisition acquires from the containment before context. -- snip -- Now that makes perfect sense to me and I can see why it happens as such. However what if I want print a.b.x.color to return red? The scenario is this: I have a directory structure: / standard_html_header side_bar folderA foo bar side_bar index_html index_html calls standard_html_header which in turn calls side_bar. If I access this via /folderA/index_html I still get the side_bar in the root not the one in folderA. This makes sense in respect to the above ZDG stuff. But how can I get it to work the way I want (/folderA/index_html uses folderA/side_bar)? I've searched zope.org and found plenty of explainaintions why this is so, but no good examples or workarounds as how to get around it :( Any ideas? -Matt -- Matt Hamilton [EMAIL PROTECTED] Netsight Internet Solutions, Ltd. Business Vision on the Internet http://www.netsight.co.uk +44 (0)117 9090901 Web Hosting | Web Design | Domain Names | Co-location | DB Integration ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
Re: [Zope-dev] How to aquire from Context?
Matt Hamilton writes: According to the ZDG (Great read, thanks guys!): -- snip -- (Acquisition works by: ) Containment Before Context Now that makes perfect sense to me and I can see why it happens as such. However what if I want (Context Before Containment). I fear, there is no simple solution. You can follow the context chain with 'aq_parent'. Thus, you can implement your own lookup. However, you will need an external method 'hasItself' to check, when you found the binding you are looking for. def hasItself(object,attr): object= getattr(object,'aq_base',object) return hasattr(object,attr) Dieter ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
Re: [Zope-dev] How to aquire from Context?
Matt, Evan Simpson came up with some external methdos that do exactly what you want about 6 months to a year ago. If you search the zope.nipltd.com archives for [EMAIL PROTECTED] and [EMAIL PROTECTED] you may well be able to find what you're after :-) cheers, Chris Matt Hamilton wrote: Dear All, I have been trying to work out how to acquire a DTML method first by context rather than by containment. According to the ZDG (Great read, thanks guys!): -- snip -- Containment Before Context If in the example above suppose both a and b have an color attribute: a=C(a) a.color=green a.b=C(b) a.b.color=red a.x=C(x) print a.b.x.color # prints green Why does a.b.x.color acquire color from a and not from b? The answer is that acquisition acquires from the containment before context. -- snip -- Now that makes perfect sense to me and I can see why it happens as such. However what if I want print a.b.x.color to return red? The scenario is this: I have a directory structure: / standard_html_header side_bar folderA foo bar side_bar index_html index_html calls standard_html_header which in turn calls side_bar. If I access this via /folderA/index_html I still get the side_bar in the root not the one in folderA. This makes sense in respect to the above ZDG stuff. But how can I get it to work the way I want (/folderA/index_html uses folderA/side_bar)? I've searched zope.org and found plenty of explainaintions why this is so, but no good examples or workarounds as how to get around it :( Any ideas? -Matt -- Matt Hamilton [EMAIL PROTECTED] Netsight Internet Solutions, Ltd. Business Vision on the Internet http://www.netsight.co.uk +44 (0)117 9090901 Web Hosting | Web Design | Domain Names | Co-location | DB Integration ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope ) ___ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )
