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Contents
# frozen_string_literal: true
require "active_model"
module StoreModel
module Types
# Implements ActiveModel::Type::Value type for handling an instance of StoreModel::Model
class One < OneBase
# Initializes type for model class
#
# @param model_klass [StoreModel::Model] model class to handle
#
# @return [StoreModel::Types::One]
def initialize(model_klass)
@model_klass = model_klass
end
# Returns type
#
# @return [Symbol]
def type
:json
end
# Casts +value+ from DB or user to StoreModel::Model instance
#
# @param value [Object] a value to cast
#
# @return StoreModel::Model
def cast_value(value)
case value
when String then decode_and_initialize(value)
when Hash then model_instance(value)
when @model_klass, nil then value
else raise_cast_error(value)
end
rescue ActiveModel::UnknownAttributeError => e
handle_unknown_attribute(value, e)
end
# Casts a value from the ruby type to a type that the database knows how
# to understand.
#
# @param value [Object] value to serialize
#
# @return [String] serialized value
def serialize(value)
case value
when Hash, @model_klass
ActiveSupport::JSON.encode(value)
else
super
end
end
private
def raise_cast_error(value)
raise StoreModel::Types::CastError,
"failed casting #{value.inspect}, only String, " \
"Hash or #{@model_klass.name} instances are allowed"
end
def model_instance(value)
@model_klass.new(value)
end
end
end
end
Version data entries
10 entries across 10 versions & 1 rubygems