RE: [Zope-dev] Rendering of objects in DTML
For the record, by following the same pattern it should be possible to implement a class that responds to too, by implementing __getitem__ On Wed, 2003-01-15 at 06:00, Bjorn Stabell wrote: > Thanks Leo, this is very helpful. It should probably be in a HOWTO > somewhere. :) > > > -Original Message- > > From: Leonardo Rochael Almeida [mailto:[EMAIL PROTECTED]] > > > > On Tue, 2003-01-14 at 01:01, Bjorn Stabell wrote: > > > > Bjorn Stabell wrote: > > > > > > I would like > > > > > > > > > ... > > > > > > > > > to call different functions. The first renders the object, > > the second > > > returns a mapping of the content's attributes/properties, the third > > > checks for "trueness" of the content. Rendering a content > > could be an > > > expensive operation and I don't want to do it when doing > > dtml-with and > > > dtml-if. > > > > > > you can do that by having your object be non-callable (or > > returning self on __call__) and implementing __str__ where > > you can have access to the REQUEST thru self.REQUEST. > > works as expected because you're getting > > the object itself. To make work you should > > implement __len__ (if your object implements sequence or > > mapping, which it probably doesn't) or __nonzero__. Read the > > python docs for details on the implementation of these methods. > > > > Cheers, Leo > > > > -- > > Ideas don't stay in some minds very long because they don't > > like solitary confinement. > > ___ > 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 ) > -- Ideas don't stay in some minds very long because they don't like solitary confinement. ___ 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] Rendering of objects in DTML
Thanks Leo, this is very helpful. It should probably be in a HOWTO somewhere. :) > -Original Message- > From: Leonardo Rochael Almeida [mailto:[EMAIL PROTECTED]] > > On Tue, 2003-01-14 at 01:01, Bjorn Stabell wrote: > > > Bjorn Stabell wrote: > > > > I would like > > > > > > ... > > > > > > to call different functions. The first renders the object, > the second > > returns a mapping of the content's attributes/properties, the third > > checks for "trueness" of the content. Rendering a content > could be an > > expensive operation and I don't want to do it when doing > dtml-with and > > dtml-if. > > > you can do that by having your object be non-callable (or > returning self on __call__) and implementing __str__ where > you can have access to the REQUEST thru self.REQUEST. > works as expected because you're getting > the object itself. To make work you should > implement __len__ (if your object implements sequence or > mapping, which it probably doesn't) or __nonzero__. Read the > python docs for details on the implementation of these methods. > > Cheers, Leo > > -- > Ideas don't stay in some minds very long because they don't > like solitary confinement. ___ 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] Rendering of objects in DTML
On Tue, 2003-01-14 at 01:01, Bjorn Stabell wrote: > > Bjorn Stabell wrote: > > I would like > > > ... > > > to call different functions. The first renders the object, the second > returns a mapping of the content's attributes/properties, the third > checks for "trueness" of the content. Rendering a content could be an > expensive operation and I don't want to do it when doing dtml-with and > dtml-if. you can do that by having your object be non-callable (or returning self on __call__) and implementing __str__ where you can have access to the REQUEST thru self.REQUEST. works as expected because you're getting the object itself. To make work you should implement __len__ (if your object implements sequence or mapping, which it probably doesn't) or __nonzero__. Read the python docs for details on the implementation of these methods. Cheers, Leo -- Ideas don't stay in some minds very long because they don't like solitary confinement. ___ 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] Rendering of objects in DTML
Bjorn Stabell wrote: I would like ... to call different functions. The first renders the object, the second returns a mapping of the content's attributes/properties, the third checks for "trueness" of the content. Rendering a content could be an expensive operation and I don't want to do it when doing dtml-with and dtml-if. That kind of implicit weirdage is not something python encourages. ...should render ...is much better. cheers, Chris ___ 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] Rendering of objects in DTML
> Bjorn Stabell wrote: > > Hello, > > > > When a content is rendered by the Zpublisher, its index_html() is > > called. When it is rendered in DTML, e.g., as content>, its > > __call__ method is called. The __call__ method is also > called if the > > object appears in or . Is it > > possible to render these two cases differently from > content>? > > Which two cases? > What do you mean by 'differently'? > > cheers, > > Chris I would like ... to call different functions. The first renders the object, the second returns a mapping of the content's attributes/properties, the third checks for "trueness" of the content. Rendering a content could be an expensive operation and I don't want to do it when doing dtml-with and dtml-if. ___ 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] Rendering of objects in DTML
Bjorn Stabell wrote: Hello, When a content is rendered by the Zpublisher, its index_html() is called. When it is rendered in DTML, e.g., as , its __call__ method is called. The __call__ method is also called if the object appears in or . Is it possible to render these two cases differently from ? Which two cases? What do you mean by 'differently'? cheers, Chris ___ 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 )
