Hello,
That worked perfectly, thanks! I knew there was some kind of syntax trick I
was missing. Honestly, the reason for the two gender loops was just my own
confusion. Intuitively, I couldn't think of another way to list
parent-child relationships in a way that was agnostic towards which parent
it was - now I realise I could have had
<td><<list-links [field:father{!!title}]>><<list-links
[field:mother{!!title}]>></td>
and that would have worked.
Looking at it, I agree there are still possibly needless loops - although
it does the job, so I'm not complaining!
<$vars haschild="[all[tiddlers]field:mother{!!title}limit[1]]">
<$list filter="[all[current]gender[female]filter<haschild>]">
<tr>
<td>''Children''</td>
<td><<list-links [field:mother{!!title}]>></td>
</tr>
</$list>
</$vars>
<$vars haschild="[all[tiddlers]field:father{!!title}limit[1]]">
<$list filter="[all[current]gender[male]filter<haschild>]">
<tr>
<td>''Children''</td>
<td><<list-links [field:father{!!title}]>></td>
</tr>
</$list>
</$vars>
I've tinkered with it to produce this:
<$vars
haschild="[all[tiddlers]field:mother{!!title}field:father{!!title}sum[]limit[1]]">
<$list filter="[all[current]filter<haschild>]">
<tr>
<td>''Children''</td>
<td><<list-links [field:mother{!!title}]>><<list-links
[field:father{!!title}]>></td>
</tr>
</$list>
</$vars>
Which seems to work and is a lot less wordy
Thanks a lot!
On Sunday, November 7, 2021 at 2:37:25 PM UTC Mark S. wrote:
>
> Your "male" line has an error. There is a missing square bracket on the
> end:
>
> <$list filter="[all[current]gender[male]">
>
> Since you don't have a label that says "mother" or "father", I don't know
> why you have two gender loops.
>
> You should be able to add a filter operator to the gender list loop
>
> <$vars haschild="[all[tiddlers]field:father{!!title}limit[1]]">
> <$list filter="[all[current]gender[male]filter<haschild>]">
> <tr>
> <td>''Children''</td>
> <td><<list-links [field:father{!!title}]>></td>
> </tr>
> </$list>
> </$vars>
>
> On Sunday, November 7, 2021 at 3:17:23 AM UTC-8 merry.ma...@gmail.com
> wrote:
>
>> Hello!
>>
>> Okay, so the context for this is that I have, or will have, a database of
>> many, many interrelated individuals. Each of those individuals has a
>> 'mother' and a 'father'. I can currently get tiddlywiki to display lists of
>> children each individual has, based on their name showing up in the mother
>> or father field of another tiddler. What I can't figure out how to do is
>> get the 'Children' row of the table not to show when an individual has no
>> children.
>>
>> For other fields I can do something like this:
>> <$list filter="[all[current]has[secondaryeducation]]">
>> <tr>
>> <td>''Secondary Education''</td>
>> <td><$link to={{!!secondaryeducation}} /></td>
>> </tr></$list>
>>
>> When an individual doesn't have the secondaryeducation field, the row
>> doesn't show up in the sidebox.
>>
>> My current set up for listing children looks like this
>>
>> <$list filter="[all[current]gender[female]]">
>> <tr>
>> <td>''Children''</td>
>> <td><<list-links [field:mother{!!title}]>></td>
>> </tr></$list>
>> <$list filter="[all[current]gender[male]">
>> <tr>
>> <td>''Children''</td>
>> <td><<list-links [field:father{!!title}]>></td>
>> </tr></$list>
>> <$list filter="[all[current]has[id]]">
>>
>> If the individual is female, it looks for instances of the title of the
>> individuals tiddler being listed as the mother in other tiddlers. Vice
>> versa for males.
>>
>> I've fiddled with lots of widgets. I think the problem is that this
>> syntax [field:father{!!title}] doesn't play well...
>>
>> Also, if you have better alternative methods of achieving this goal, I'm
>> all ears! I know filling in a 'Children' field, would solve this problem,
>> but I want to cut manual data input to a minimum, and in principle all
>> biological familial relationships (siblings, aunts, grandparents...etc.)
>> can be expressed in mother-child, and father-child relationships.
>>
>>
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