Ruby on rails - flash variable

Question

I am brand new to rails. During training, I came across using a flash variable to save data for the next postback when redirecting.

My questions

• when to use it.

• how rails support it for me, whether it makes a return trip to the user and back, or supports the server side.

• if the server side is supported, how the rails know when to discard a variable and not clog its memory.

Any answers would be appreciated.

Answer 1

flash is used to store data (usually text) that is required in the next request, and they are automatically deleted after the next request.

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Answer 2

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