verify

Verify the given actions so that if certain prerequisites are not met, the user is redirected to a different action. The options parameter is a hash consisting of the following key/value pairs:

• :params: a single key or an array of keys that must be in the @params hash in order for the action(s) to be safely called.
• :session: a single key or an array of keys that must be in the @session in order for the action(s) to be safely called.
• :flash: a single key or an array of keys that must be in the flash in order for the action(s) to be safely called.
• :method: a single key or an array of keys—any one of which must match the current request method in order for the action(s) to be safely called. (The key should be a symbol: :get or :post, for example.)
• :add_flash: a hash of name/value pairs that should be merged into the session’s flash if the prerequisites cannot be satisfied.
• :redirect_to: the redirection parameters to be used when redirecting if the prerequisites cannot be satisfied.
• :render: the render parameters to be used when the prerequisites cannot be satisfied.
• :only: only apply this verification to the actions specified in the associated array (may also be a single value).
• :except: do not apply this verification to the actions specified in the associated array (may also be a single value).