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# frozen_string_literal: true
module ActiveRecord
module Associations
class SingularAssociation < Association # :nodoc:
# Implements the reader method, e.g. foo.bar for Foo.has_one :bar
def reader
ensure_klass_exists!
if !loaded? || stale_target?
reload
end
target
end
# Resets the \loaded flag to +false+ and sets the \target to +nil+.
def reset
super
@target = nil
end
# Implements the writer method, e.g. foo.bar= for Foo.belongs_to :bar
def writer(record)
replace(record)
end
def build(attributes = nil, &block)
record = build_record(attributes, &block)
set_new_record(record)
record
end
# Implements the reload reader method, e.g. foo.reload_bar for
# Foo.has_one :bar
def force_reload_reader
reload(true)
target
end
private
def scope_for_create
super.except!(*Array(klass.primary_key))
end
def find_target
if disable_joins
scope.first
else
super.first
end
end
def replace(record)
raise NotImplementedError, "Subclasses must implement a replace(record) method"
end
def set_new_record(record)
replace(record)
end
def _create_record(attributes, raise_error = false, &block)
record = build_record(attributes, &block)
saved = record.save
set_new_record(record)
raise RecordInvalid.new(record) if !saved && raise_error
record
end
end
end
end
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