Show tag list only when grandchildren exist

[Stuart Amor]

I am looking for a way of returning a list of all the tiddlers that are tagged with the current tiddler title. However I would like to omit all tiddlers that are not themselves subsequently tagged.

Let me try to give you an example... if I have three tiddlers X, Y and Z. Within the parent tiddler X, I would like to return a list containing its child Y, provided Y is tagged with X AND Z is tagged with Y (ie X has a grandchild). However, if there were no tiddlers tagged with Y, then Y would not appear in the listing within X.

Does that make sense?

[Diego Mesa]

Hey Stuart,

This code seems to work for me:

<$list filter="[all[current]tagging[]]" variable="child">

    <$list filter="[tag<child>]" variable="grandchild">

        <<child>> has grandchild <<grandchild>>

    </$list>

</$list>

You can test it on https://tiddlywiki.com/ by making 4 tiddlers:

• titled X, with the content above
• titled Y tagged with X
• titled Z tagged with Y
• titled Q tagged with X

Best,

Diego

[Stuart Amor]

Thank you Diego, that has certainly put me on the correct path!  If I wanted to take this to the next stage, how could I change the output so that it would be presented as a outline structure:

• Y
  
• Z1
• Z2
• Q
• P1
• P2

[Stuart Amor]

Its been awhile since I have used TW5 and its coming back to me slowly...  I have currently got down to the following code:

\define tagtable(Tag)

<$list filter="[tag[$Tag$]]" variable="Parent">

<$list filter="[tag<Parent>sort[]]" variable="Child">         

<$list filter="[tag<Child>sort[]]" variable="GrandChild">

<ul>

      <li><$link to=<<Parent>>><<Parent>></$link></li>

      <ul>

      <li><$link to=<<Child>>><<Child>></$link></li>

           <ul>

           <li><$link to=<<GrandChild>>><<GrandChild>></$link></li>

           </ul>

      </ul>

</ul>

</$list></$list></$list>

\end

<$macrocall $name="tagtable" Tag='X'/>

I have two problems with this, firstly I am not sure how I can pass the [all[current]tagging[]] via a macrocall - its not the end of the world if I can't, but I have had this situation quite a bit so would nice to be able to learn how it can be done if possible.

I have a bit of a dilemma as this code returns:

• X
• Y
• Z1
• X
• Y
• Z2

I would like X and Y to be able to group the Z values and only appear once.  I can see how this problem occurs, but can figure out a way of avoiding this problem without reintroducing the Parent's Children that don't have GrandChildren into the report. 

[Mark S.]

Something like this may result in the kind of spacing you want and pre-detect grandchildren. Perhaps you don't even want the top-level to show if there are no grand children?

The <$list filter="[tag<Parent>limit[1]]"> listwidget here is used to detect if there are grandchildren. It's limited to 1 instance, since you don't want to multiply grandchildren by grandchildren.





\define tagtable(Tag)

<ul>
<li><$link to="""$Tag$""">$Tag$</$link></li>
<ul>

<$list filter="[tag[$Tag$]]" variable="Parent">

<$list filter="[tag<Parent>limit[1]]">
      <li><$link to=<<Parent>>><<Parent>></$link></li>
      <ul>
<$list filter="[tag<Parent>sort[]]" variable="Child">        
      <li><$link to=<<Child>>><<Child>></$link></li>
      <ul>
<$list filter="[tag<Child>sort[]]" variable="GrandChild">
           <li><$link to=<<GrandChild>>><<GrandChild>></$link></li>
</$list></ul></$list></ul></$list></$list></ul></ul>
\end

<$macrocall $name="tagtable" Tag={{!!title}} />

Good luck!

-- Mark