Mucho thanks-os.
For any other interested parties:
This is a simple non-caching page, but it is not virtual (where you
could do interesting stuff inside the render method):
class SimplePage < Page
def cache?
false
end
def render
lazy_initialize_parser_and_context
if layout
parse_object(layout)
else
render_page_part(:body)
end
end
end
This is the smallest example of a non-caching virtual page, where you
can do interesting stuff inside the find_by_url and I'm assuming
render (please let me know if I'm wrong about that.)
class BonzePage < Page
def virtual?
true
end
def cache?
false
end
tag "complain" do | tag |
"Jim, I'm a doctor, not a " + @request.parameters[:url].to_s
end
def find_by_url(url, live = true, clean = false)
url = clean_url(url) if clean
return self
end
end
On Aug 15, 2007, at 4:05 PM, John W. Long wrote:
> Paul Hoehne wrote:
>> When I set they page type on a page to "Simple" and try to access the
>> page, I get a 404.
>>
>> Examining the log and injecting logger statements it seems that the
>> find_by_url method on the page is unable to locate the slug of the
>> virtual page:
>> SELECT * FROM pages WHERE (pages.parent_id = 1) AND (pages."slug" =
>> 'simple') LIMIT 1
>> Returns a row when executed from a postgresql console session but
>> fails to return a row when executing inside of Radiant.
>
> That's because of this code:
>
> http://dev.radiantcms.org/radiant/browser/trunk/radiant/app/models/
> page.rb#L128
>
> By default, the find_by_url method is setup to not find virtual pages.
> Most of the time, in order to use a virtual page you need
> anotheranother
> page type that overrides the find_by_url method. This is exactly what
> the archive page does:
>
> http://dev.radiantcms.org/radiant/browser/trunk/radiant/app/models/
> archive_page.rb#L18
>
> with the archive index pages:
>
> http://dev.radiantcms.org/radiant/browser/trunk/radiant/app/models/
> archive_day_index_page.rb#L14
> http://dev.radiantcms.org/radiant/browser/trunk/radiant/lib/
> archive_index_tags_and_methods.rb#L43
>
>> I can also make the page a env dump page, for example, and don't get
>> a 404 error. When I turn the page back into a "Simple" page, I go
>> back to 404-ville.
>
> Right. That's because the env dump page is not a virtual page. Virtual
> pages don't show up in standard queries.
>
> What exactly is a virtual page? That's a hard question. The simple
> answer is it is a page does not have its own URL. The File Not Found
> page is an excellent example. You wouldn't want the File Not Found
> page
> to show up in search results or a list of a page's children.
> Because of
> this it is marked "virtual". Queries for displaying pages should, for
> the most part, exclude virtual pages.
>
> --
> John Long
> http://wiseheartdesign.com
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