[BUG] TypeError: value.toString is not a function

[ittayd]

Describe the bug

This issue manifests itself after a weird interaction that I'll describe below. The bottom line is that a json field causes the exception in the subject and after that the wiki becomes unusable: cannot delete the field, tiddler or anything as the error keeps popping.

It happens in $:/core/modules/tiddler.js in the method getFieldString as the value of the field doesn't have the 'toString' method.

Attached is a wiki where this happens (try to edit a tiddler)

Expected behavior

No response

To Reproduce

1. Go to '...'
2. Click on '....'
3. Scroll down to '....'
4. See error

Screenshots

No response

TiddlyWiki Configuration

• Version [e.g. v5.1.24]
• Saving mechanism [e.g. Node.js, TiddlyDesktop, TiddlyHost etc]
• Plugins installed [e.g. Freelinks, TiddlyMap]

Desktop (please complete the following information):

• OS: [e.g. iOS]
• Browser [e.g. chrome, safari]
• Version [e.g. 22]

Smartphone (please complete the following information):

• Device: [e.g. iPhone6]
• OS: [e.g. iOS8.1]
• Browser [e.g. stock browser, safari]
• Version [e.g. 22]

Additional context

No response

[ittayd]

error.zip

[saqimtiaz]

The bottom line is that a json field causes the exception in the subject and after that the wiki becomes unusable:

Which field in which tiddler, what is the content of this field?

Can you please provide steps to reproduce the problem in an empty TiddlyWiki file?

[ittayd]

(Note that I attached a wiki that has the error manifested) The tiddler is $:/plugins/Gk0Wk/TW5-CodeMirror-Enhanced/config.json, the field is 'cache' (but note it also happened in a field named 'fields' in another wiki).

[ittayd]

It turns out 'cache' is the field that causes the exception if I edit config.json, but if I create a new tiddler and save, then the exception is in the field 'fields' in config.json

[linonetwo]

@ittayd thanks, I think jsontiddler module should provide a stringify method for fields field, or ignore the fields field.