class
ActionController::ParameterMissing
v8.1.1 -
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- Superclass: KeyError
Raised when a required parameter is missing.
params = ActionController::Parameters.new(a: {}) params.fetch(:b) # => ActionController::ParameterMissing: param is missing or the value is empty or invalid: b params.require(:a) # => ActionController::ParameterMissing: param is missing or the value is empty or invalid: a params.expect(a: []) # => ActionController::ParameterMissing: param is missing or the value is empty or invalid: a
Included modules
- DidYouMean::Correctable
Attributes
| [R] | keys |
| [R] | param |
Files
- actionpack/lib/action_controller/metal/strong_parameters.rb