chore: add exception message for invalid path value

[KristianH]

TL;DR

Note

I encountered a strange bug related to a Story in Storyblok. This PR might help identify the root cause.

Long Version

In the Storyblok API responses (both Management API and Content Delivery API), the path value was returned as an empty string ("") instead of null.Running the following command resulted in an error:

symfony console registries:setup

Which produced:

In Assert.php line 2074:

Expected a different value than "".

As a result, many links were missing in the LinkRegistry, which is part of the storyblok/symfony-bundle.

How to Fix This in Storyblok

Review the Content Delivery API response from Retrieve Multiple Links, for example:

https://api.storyblok.com/v2/cdn/links/?version=draft&token={YOUR_TOKEN}&per_page=1000

Look for entries where "path": "" (the expected default is "path": null).Delete and recreate the affected stories in the Storyblok editor.

Final Note

I'm not sure whether this bug is easily reproducible in Storyblok — and I didn’t want to risk reproducing it in a production environment.
For context: the affected story had its first_published_at value changed, and multi-language support was enabled.

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 93.88%. Comparing base (006cdab) to head (5ea84d2).

Additional details and impacted files

@@            Coverage Diff            @@
##             master      #68   +/-   ##
=========================================
  Coverage     93.88%   93.88%           
- Complexity      461      462    +1     
=========================================
  Files            72       72           
  Lines          1620     1620           
=========================================
  Hits           1521     1521           
  Misses           99       99           

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[edodusi]

To me this looks legit. I would suggest to change the commit prefix from chore to fix because this will likely be released as a patch.

[silasjoisten]

Yes and please add proper exception messages to all the other Asserts too.