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Setup default session store internally, no longer through an initializer #25438
…ser or by Rails - We need to ability to check whether the session store it is set or not so that we can set it ourselves in an internal initializer. - We can't rely on return value of `config.session_store` as it can return `nil` when set to `disabled` and we will accidentally override it and set to default cookie store. - So introduced new method which just tells us whether it is set or not.
…ly when set to activerecord session store - Use keyword args as it is possible to use them now. - The error message for activerecord-session_store gem was added in 1807384. - But it was added for a code path which gets called when we try to **access** the session store, not when we **set** it. - So the test expecting the exception started failing because now the session store is set via railtie again **after** setting it first with :active_record_store in the test. - As the error is not raised while setting the store to :active_record_store, the store gets overwritten by railtie and when we access it via `session_store` while building the default middleware stack, the exception is not raised. - This commit moves the code for raising the exception to the path where we try to set the store.
…ion initializer - By default the session store will be set to cookie store with application name as session key. - Older apps are not affected as they will have the session store initializer generated by Rails in older versions, and Rails will not overwrite the session store if it is already set or disabled. - But new apps will not have the initializer, instead the session store will be set to cookie store by default. - Based on comment by DHH here - #25181 (comment).