How to call multiple service methods in controller

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Controller calls multiple service methods

Generally speaking, service methods are transactional, so it is safe to encapsulate all operations in a service method.

If multiple service methods are called in controller, this can only be done in the case of a query.

Some problems with controller calling methods in service

A question about transaction propagation during development:

Controller calls method an in service, method a has no transaction, method a calls method b in service, method b has transaction.

Then when a method reports an error, the transaction in the b method will not be rolled back, and when the transaction commits the b method error, the transaction in the a method will be committed directly and will not be rolled back.

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