Phoenix.MissingParamError

Phoenix.MissingParamError exception

Raised when a key is expected to be present in the request parameters, but is not.

This exception is raised by Phoenix.Controller.scrub_params/2 which:

Checks to see if the required_key is present (can be empty)
Changes all empty parameters to nils (“” -> nil).

If you are seeing this error, you should handle the error and surface it to the end user. It means that there is a parameter missing from the request.

Summary

Functions

exception(msg)

Specs

exception(String.t) :: Exception.t

exception(Keyword.t) :: Exception.t

message(exception)

Specs

message(Exception.t) :: String.t