Class: NilClass
Instance Attribute Summary
-
#blank? ⇒ true
readonly
nil
is blank:
Instance Method Summary
-
#to_param
Returns
self
. -
#try(_method_name = nil)
Calling #try on
nil
always returnsnil
. -
#try!(_method_name = nil)
Calling #try! on
nil
always returnsnil
.
Instance Attribute Details
#blank? ⇒ true
(readonly)
nil
is blank:
nil.blank? # => true
# File 'activesupport/lib/active_support/core_ext/object/blank.rb', line 56
def blank? true end
Instance Method Details
#to_param
Returns self
.
# File 'activesupport/lib/active_support/core_ext/object/to_query.rb', line 20
def to_param self end
#try(_method_name = nil)
Calling try
on nil
always returns nil
. It becomes especially helpful when navigating through associations that may return nil
.
nil.try(:name) # => nil
Without try
@person && @person.children.any? && @person.children.first.name
With try
@person.try(:children).try(:first).try(:name)
# File 'activesupport/lib/active_support/core_ext/object/try.rb', line 148
def try(_method_name = nil, *) nil end
#try!(_method_name = nil)
Calling try!
on nil
always returns nil
.
nil.try!(:name) # => nil
# File 'activesupport/lib/active_support/core_ext/object/try.rb', line 155
def try!(_method_name = nil, *) nil end