Method: Cuba#param

Defined in:
lib/cuba.rb

#param(key, default = nil) ⇒ Object

Ensures that certain request parameters are present. Acts like a precondition / assertion for your route. A default value can be provided as a second argument. In that case, it always matches and the result is either the parameter or the default value.

Examples:

# POST with data like user[fname]=John&user[lname]=Doe
on "signup", param("user") do |atts|
  User.create(atts)
end

on "login", param("username", "guest") do |username|
  # If not provided, username == "guest"
end


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# File 'lib/cuba.rb', line 290

def param(key, default = nil)
  value = req.params[key.to_s] || default

  lambda { captures << value unless value.to_s.empty? }
end