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# frozen_string_literal: true
require "active_model/attribute"
module ActiveRecord
class Relation
class QueryAttribute < ActiveModel::Attribute # :nodoc:
def initialize(...)
super
# The query attribute value may be mutated before we actually "compile" the query.
# To avoid that if the type uses a serializer we eagerly compute the value for database
if value_before_type_cast.is_a?(StatementCache::Substitute)
# we don't need to serialize StatementCache::Substitute
elsif @type.serialized?
value_for_database
elsif @type.mutable? # If the type is simply mutable, we deep_dup it.
@value_before_type_cast = @value_before_type_cast.deep_dup
end
end
def type_cast(value)
value
end
def value_for_database
@value_for_database = _value_for_database unless defined?(@value_for_database)
@value_for_database
end
def with_cast_value(value)
QueryAttribute.new(name, value, type)
end
def nil?
unless value_before_type_cast.is_a?(StatementCache::Substitute)
value_before_type_cast.nil? ||
type.respond_to?(:subtype) && serializable? && value_for_database.nil?
end
end
def infinite?
infinity?(value_before_type_cast) || serializable? && infinity?(value_for_database)
end
def unboundable?
unless defined?(@_unboundable)
serializable? { |value| @_unboundable = value <=> 0 } && @_unboundable = nil
end
@_unboundable
end
def ==(other)
super && value_for_database == other.value_for_database
end
alias eql? ==
def hash
[self.class, name, value_for_database, type].hash
end
private
def infinity?(value)
value.respond_to?(:infinite?) && value.infinite?
end
end
end
end
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