Symfony and Redis why is the persisted object not equal to the one retrieved from the cache?

Question

symfony

Good afternoon.
The project is written in symfony. This is an Api, jms/serializer-bundle
is used for serialization. I use the Symfony/Cache component to work with Redis (RedisAdapter).
I save an array of objects. After extracting and returning to response I get an error

{"code":500,"message":"Warning: Invalid argument supplied for foreach()"}

This is not the case for all objects.
When comparing the serialized cache and an array of objects, I get true.
The nesting of objects is large.
I don't understand where this foreach comes from. Possibly in the serializer.
Any ideas why that is?
Perhaps someone already had a similar bug.

Answer 1

Turn on the warning interceptor before serialization and catch these errors. Where you catch them, you will have enough information to understand what happened. And you won’t make a senseless save.