60 lines
1.9 KiB
Ruby
60 lines
1.9 KiB
Ruby
require 'active_resource/exceptions'
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module ActiveResource # :nodoc:
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class Schema # :nodoc:
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# attributes can be known to be one of these types. They are easy to
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# cast to/from.
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KNOWN_ATTRIBUTE_TYPES = %w( string text integer float decimal datetime timestamp time date binary boolean )
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# An array of attribute definitions, representing the attributes that
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# have been defined.
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attr_accessor :attrs
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# The internals of an Active Resource Schema are very simple -
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# unlike an Active Record TableDefinition (on which it is based).
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# It provides a set of convenience methods for people to define their
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# schema using the syntax:
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# schema do
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# string :foo
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# integer :bar
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# end
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#
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# The schema stores the name and type of each attribute. That is then
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# read out by the schema method to populate the schema of the actual
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# resource.
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def initialize
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@attrs = {}
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end
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def attribute(name, type, options = {})
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raise ArgumentError, "Unknown Attribute type: #{type.inspect} for key: #{name.inspect}" unless type.nil? || Schema::KNOWN_ATTRIBUTE_TYPES.include?(type.to_s)
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the_type = type.to_s
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# TODO: add defaults
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#the_attr = [type.to_s]
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#the_attr << options[:default] if options.has_key? :default
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@attrs[name.to_s] = the_type
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self
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end
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# The following are the attribute types supported by Active Resource
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# migrations.
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KNOWN_ATTRIBUTE_TYPES.each do |attr_type|
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# def string(*args)
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# options = args.extract_options!
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# attr_names = args
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#
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# attr_names.each { |name| attribute(name, 'string', options) }
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# end
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class_eval <<-EOV, __FILE__, __LINE__ + 1
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def #{attr_type.to_s}(*args)
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options = args.extract_options!
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attr_names = args
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attr_names.each { |name| attribute(name, '#{attr_type}', options) }
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end
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EOV
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end
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end
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end
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