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require 'active_resource/exceptions'
module ActiveResource # :nodoc:
class Schema # :nodoc:
# attributes can be known to be one of these types. They are easy to
# cast to/from.
KNOWN_ATTRIBUTE_TYPES = %w( string integer float )
# An array of attribute definitions, representing the attributes that
# have been defined.
attr_accessor :attrs
# The internals of an Active Resource Schema are very simple -
# unlike an Active Record TableDefinition (on which it is based).
# It provides a set of convenience methods for people to define their
# schema using the syntax:
# schema do
# string :foo
# integer :bar
# end
#
# The schema stores the name and type of each attribute. That is then
# read out by the schema method to populate the actual
# Resource's schema
def initialize
@attrs = {}
end
def attribute(name, type, options = {})
raise ArgumentError, "Unknown Attribute type: #{type.inspect} for key: #{name.inspect}" unless type.nil? || Schema::KNOWN_ATTRIBUTE_TYPES.include?(type.to_s)
the_type = type.to_s
# TODO: add defaults
#the_attr = [type.to_s]
#the_attr << options[:default] if options.has_key? :default
@attrs[name.to_s] = the_type
self
end
# The following are the attribute types supported by Active Resource
# migrations.
# TODO: We should eventually support all of these:
# %w( string text integer float decimal datetime timestamp time date binary boolean ).each do |attr_type|
KNOWN_ATTRIBUTE_TYPES.each do |attr_type|
class_eval <<-EOV
def #{attr_type.to_s}(*args)
options = args.extract_options!
attr_names = args
attr_names.each { |name| attribute(name, '#{attr_type}', options) }
end
EOV
end
end
end
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