class Kemal::ParamError

• Kemal::ParamError
• Exception
• Reference
• Object

Overview

Exception raised when a parameter is missing from the request, or is present but its value cannot be converted to the declared type.

Example

@[Get("/users")]
def index(name : String, age : Int32)
  "Hello, #{name}, age #{age}"
end
# GET /users?age=30 (no name=...) raises Kemal::ParamError for "name",
#   reason: Missing
# GET /users?name=Ary&age=foo raises Kemal::ParamError for "age",
#   reason: CastError

Defined in:

kemal/from_www_form.cr

Constructors

• .new(param_name : String, reason : Kemal::ParamError::Reason, expected_type : Nil | String = nil, value : Nil | String = nil)

Instance Method Summary

• #expected_type : String | Nil

  The Crystal type name the parameter was declared as.

• #param_name : String

  The name of the parameter that failed.

• #reason : Reason

  Why the parameter failed.

• #value : String | Nil

  The raw, unparsed value that was posted for this parameter.

Constructor Detail

Instance Method Detail