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Exception: NoMethodError

Relationships & Source Files
Super Chains via Extension / Inclusion / Inheritance
Class Chain:
Instance Chain:
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 "hello":String

Class Attribute Summary

::Exception - Inherited

.to_tty?

Returns true if exception messages will be sent to a tty.

Class Method Summary

::NameError - Inherited

.new

Construct a new ::NameError exception.

::Exception - Inherited

.exception

With no argument, or if the argument is the same as the receiver, return the receiver.

.new

Construct a new ::Exception object, optionally passing in a message.

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

#==

Equality—If obj is not an ::Exception, returns false.

#backtrace

Returns any backtrace associated with the exception.

#backtrace_locations

Returns any backtrace associated with the exception.

#cause

Returns the previous exception ($!) at the time this exception was raised.

#exception

With no argument, or if the argument is the same as the receiver, return the receiver.

#full_message

Returns formatted string of exception.

#inspect

Return this exception's class name and message.

#message

Returns the result of invoking exception.to_s.

#set_backtrace

Sets the backtrace information associated with exc.

#to_s

Returns exception's message (or the name of the exception if no message is set).

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 1544

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(argc, argv);
    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 1743

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

Instance Method Details

#argsObject

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

[ GitHub ]

  
# File 'error.c', line 1730

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