Hi Yaron,
Thank you. I'm not trying to store the ComposedOf data but to query PartOf
as you and Sam suggest. For example, I do not even mention ComposedOf in
the Form. I mention it in the Template, but perhaps did so incorrectly so
that when I pressed "Recreate Data" it added a column? Regardless, I'll
continue to experiment and get it working. Thank you for these great tools!
-david
On Sun, Sep 5, 2021 at 11:14 PM Yaron Koren <yaro...@gmail.com> wrote:
> Hi David,
>
> You shouldn't be storing inverse relationships (like "ComposedOf") at all
> - rather, that information should get directly queried whenever you want to
> display it. And the variable to use, when you want to display a page's
> name, is {{PAGENAME}} - so, in the template, you could add a query like:
>
> {{#cargo_query:table=Place|fields=_pageName|where=PartOf = '{{PAGENAME}}'}}
>
> -Yaron
>
> On Fri, Sep 3, 2021 at 8:03 PM David Epstein <david...@umich.edu> wrote:
>
>> Sam and Yaron,
>>
>>
>> I'm trying to implement the inverse of PartOf (ComposedOf) as discussed
>> on this list a few days ago (also at end of this email). I'm using Cargo,
>> PageSchemas, and PageForms. My understanding is that ComposedOf would not
>> be part of the schema, but would be a manual edit to the automatically
>> generated template for the *Place* category. Below is the template code
>> with the manual edits in color. The first "_pageName" refers to data in
>> Cargo tables. The second "_pageName" is the current page being displayed,
>> which I don't know how to specify in this context. This code results in no
>> error and no text after the "ComposedOf" label. When viewing the place "Sol
>> System", the ComposedOf text should include links to Earth and Mars, since
>> they are both currently in the Place table as PartOf the Sol System. In
>> this context, the second _pageName should return "Sol System" (or
>> "Sol_System" ?).
>>
>> <noinclude>
>> {{#template_params:Type|PartOf (label=Part Of)|ComposedOf}}
>> {{#cargo_declare:_table=Place|Type=Page (allowed
>> values=SolarSystem,AsteroidBelt,Asteroid,Planet,WaterBody,Continent,GeographicEntity,Nation,SubNationalRegion,City,Neighborhood,Street,Building,Room)|PartOf=Page
>> |ComposedOf={{#cargo_query:table=Place|fields=Place._pageName|where =
>> PartOf HOLDS "_pageName"}}}}
>> </noinclude><includeonly>{{#cargo_store:_table=Place}}
>> {{#template_display:_format=standard}}
>> [[Category:Place]]
>> </includeonly>
>>
>> I pushed on "Recreate Data" in the Template menu, which may explain how
>> "ComposedOf" got added to the table. I did not add ComposedOf to the schema.
>> Here is the Place table:
>>
>> Page Type PartOf ComposedOf
>> Earth Planet Sol System
>> Mars Planet Sol System
>> Sol System SolarSystem
>>
>>
>>
>> -david
>>
>>
>>
>> On Mon, Aug 30, 2021 at 9:11 PM Sam Wilson <s...@samwilson.id.au> wrote:
>>
>>> I think the normal way to do this in Cargo would be not to have the
>>> inverse property stored in a page's data, but rather to query the inverse
>>> wherever required. So, for example, an Idaho page would define part_of
>>> as USA, and then on the USA page you could have a template that
>>> displays all the composed_of pages: {{#cargo query: tables = places |
>>> where = part_of HOLDS 'USA' }}. This way, there's no double-entry of
>>> values and so nothing to get out of sync.
>>> On 31/8/21 6:42 am, David Epstein wrote:
>>>
>>> If a class has a *composed_of *property and a *part_of* property, can I
>>> define these somewhere as inverse relationships? I'd like to set Idaho as
>>> *part_of* the USA and then (automatically) see that assignment in USA's
>>> *composed_of
>>> *list?
>>>
>>> Moreover, is it possible to specify that the properties have a more
>>> specific domain, not just any page but only pages from the category "Place"?
>>>
>>>
>>>
>>>
>>>
>>>
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