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Exception: NoMethodError

Relationships & Source Files
Super Chains via Extension / Inclusion / Inheritance
Class Chain:
self, ::NameError, ::StandardError, ::Exception
Instance Chain:
self, ::NameError, ::StandardError, ::Exception
Inherits: NameError
Defined in: error.c,
error.c

Overview

Raised when a method is called on a receiver which doesn’t have it defined and also fails to respond with method_missing.

"hello".to_ary

raises the exception:

NoMethodError: undefined method `to_ary' for an instance of String

Class Attribute Summary

::Exception - Inherited

.to_tty?

Returns true if exception messages will be sent to a terminal device.

Class Method Summary

::NameError - Inherited

.new

Construct a new ::NameError exception.

::Exception - Inherited

.exception

Returns an exception object of the same class as self; useful for creating a similar exception, but with a different message.
.new

Returns a new exception object.

Instance Attribute Summary

Instance Method Summary

  • #args ⇒ Object

    Return the arguments passed in as the third parameter to the constructor.

::NameError - Inherited

#local_variables

Return a list of the local variable names defined where this ::NameError exception was raised.
#name

Return the name associated with this ::NameError exception.
#receiver

Return the receiver associated with this ::NameError exception.

::Exception - Inherited

#==

Returns whether object is the same class as self and its #message and #backtrace are equal to those of self.
#backtrace

Returns a backtrace value for self; the returned value depends on the form of the stored backtrace value:
#backtrace_locations

Returns a backtrace value for self; the returned value depends on the form of the stored backtrace value:
#cause

Returns the previous value of global variable $!, which may be nil (see Global Variables):
#detailed_message

Returns the message string with enhancements:
#exception

Returns an exception object of the same class as self; useful for creating a similar exception, but with a different message.
#full_message

Returns an enhanced message string:
#inspect

Returns a string representation of self:
#message

Returns #to_s.
#set_backtrace

Sets the backtrace value for self; returns the given +value:
#to_s

Returns a string representation of self:

Constructor Details

.new(msg = nil, name = nil, args = nil, private = false, receiver: nil) ⇒ no_method_error

Construct a NoMethodError exception for a method of the given name called with the given arguments. The name may be accessed using the #name method on the resulting object, and the arguments using the #args method.

If private argument were passed, it designates method was attempted to call in private context, and can be accessed with #private_call? method.

receiver argument stores an object whose method was called.

[ GitHub ] 

  


# File 'error.c', line 2358



static VALUE
nometh_err_initialize(int argc, VALUE *argv, VALUE self)
{
    int priv;
    VALUE args, options;
    argc = rb_scan_args(argc, argv, "*:", NULL, &options);
    priv = (argc > 3) && (--argc, RTEST(argv[argc]));
    args = (argc > 2) ? argv[--argc] : Qnil;
    if (!NIL_P(options)) argv[argc++] = options;
    rb_call_super_kw(argc, argv, RB_PASS_CALLED_KEYWORDS);
    return nometh_err_init_attr(self, args, priv);
}


  







Instance Attribute Details



  

    #private_call?  ⇒ Boolean  (readonly)  



  

    

Return true if the caused method was called as private.


  



  [ GitHub ]


  

  


# File 'error.c', line 2642



static VALUE
nometh_err_private_call_p(VALUE self)
{
    return rb_attr_get(self, id_private_call_p);
}


  







Instance Method Details



  

    #args  ⇒ Object   



  

    

Return the arguments passed in as the third parameter to the constructor.


  



  [ GitHub ]


  

  


# File 'error.c', line 2629



static VALUE
nometh_err_args(VALUE self)
{
    return rb_attr_get(self, id_args);
}