Add same null-to-string fix for enum case #455
Merged
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This PR serves the same purpose as in #450 but that PR missed the enum case.
The enum case of schema validation currently compares the value you have against all possible values.
So, to fix it, when entering the enum case I check if the type should be string but is in fact null. If so, I substitute the value to be tested with an empty string, test it against the enum list, and then perform cleanup.