Create a tiddler if not existed: Issue with tiddler its title contains space like "Hello there"

[Mohammad]

I have a macro as below. When you call it with a tiddler name, it will check to see if the tiddler exists

• If exist it will navigate to that tiddler
• If not, it will call another macro to create it and then navigate to it

\define create-note(tname)

  <$set name="myTid" filter="[[$tname$]addsuffix[-math]]">

    <$list filter="[title<myTid>] +[has[title]]" 

        variable="newTid" 

        emptyMessage=<<tidller-not-exist $tname$>>

    >

        <$action-navigate $to=<<newTid>> />

    </$list>

  </$set>

\end

\define tiddler-not-exist(parent)

  <$action-setfield 

    $tiddler= {{{$(myTid)$}}}

    text="Hi, this is a new note"

    tags="notes"

  />

    <$action-navigate $to={{{$(myTid)$}}} />

\end

The problem is the macro fails when you pass a name with space as parameter to it. It create the tiddler and overwrite the existed one!

• Works

<$button> Hi

<<create-note "Hi">>

</$button>

• Fails

<$button> Hello there

<<create-note "Hello there">>

</$button>

[Jed Carty]

There are a few things.

First, the working version:

\define create-note(tname)

  <$set name="myTid" filter="[[$tname$]addsuffix[-math]]" select=0>

    <$list filter="[title<myTid>] +[has[title]]" 

        variable="newTid" 

        emptyMessage=<<tiddler-not-exist>>

    >

        <$action-navigate $to=<<newTid>> />

    </$list>

  </$set>

\end

\define tiddler-not-exist()

  <$action-setfield 

    $tiddler=<<myTid>>

    text="Hi, this is a new note"

    tags="notes"

  />

    <$action-navigate $to=<<myTid>>/>

\end

<$button>

Test

<<create-note "Bob Joe">>

</$button>

what I changed:

- A typo in the emptyMessage macrocall

- replace {{{myTid}}} with <<myTid>> and add select=0 to the set widget to prevent it from adding [[ and ]] around the output. Using {{{$(myTid)$}}} evaluates it as a space separated list so any title with a space would be two (or more) separate things, not a single title.

- remove parent as an input to tiddler-not-exist and remote the unneeded input from the emptyMessage macrocall because it isn't used

Alternately, this could have fixed it:

- Using """$(myTid)$""" to make a string instead of {{{$(myTid)$}}} to evaluate a filter. This is one place that would break if you had a space, {{{bob joe}}} is returned as a list with two entries, "bob" and "joe" where """bob joe""" is a string and can be used as a single title. I am using """ because that lets you put " and ' into the title if you want to for some reason and (hopefully) """ is less common in titles.

[Mohammad]

Hello Jed,

 Thank you very much! It works like a charm!

I would also appreciate your explanation on how {{{}}} works and why """" is used here!

- Mohammad