[PropertyInfo][DoctrineBridge] wrong type for doctrine json column

[norkunas]

Symfony version(s) affected: >=4.4

Description

#35851 introduced a BC break with json columns. Previously when using @var mixed and @ORM\Column(type="json") property info returned null for type so serializer accepted any value for this, but currently it always returns Type as builtin array and it doesn't accept anymore mixed values.

How to reproduce

will write if needed

Possible Solution

Return null for json type column, while leaving json_array column intact.

Additional context

[fancyweb]

Status: reviewed.

This is normal since now the json type is supported. json is the new name of json_array.

However I agree with you that this type can be used with mixed data, ie it doesn't have to be array. I reported it in another PR (see #35794 (comment)). But it has always been like this (on the json_array type), this is why I applied the same treatment for json. Both have to be consistent I guess. IMO, we should return null for both since we can't guess but that would break compatibility too.

[norkunas]

json is the new name of json_array

I disagree. In json_array doctrine was converting null or empty value to array, but json type doesn't do that. In my opinion property info is too strict to always set this as array while doctrine can store any value for json