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Contents
module Eco
module API
module Common
# Helpers for dynammic generation of classes based on a hierarchical model
# @attr_reader model [Hash, nil] the `model` of the current `class`
module ClassHierarchy
include Eco::API::Common::ClassHelpers
attr_reader :model
# @param value [Hash, Enumerable, String, Symbol, nil] unparsed model to be assigned to the `class`
def model=(value)
@model = parse_model(value)
end
# @return [Array<String>] the `keys` of the current class' `model`
def model_attrs
(model && model.keys) || []
end
# Thanks to this step the format on the declaration of the model is flexible
# @param value [Hash, Enumerable, String, Symbol, nil]
# @return [Hash, nil] where keys are `Symbol` s
def parse_model(model)
case model
when String
return parse_model(model.to_sym)
when Symbol
return {model => nil}
when Hash
return model.each_with_object({}) do |(k,v), hash|
hash[k.to_sym] = v
end
when Enumerable
return model.each_with_object({}) do |sub, hash|
hash.merge!(parse_model(sub))
end
when NilClass
return nil
else
raise "Incorrect model declaration, allowed String, Symbol, Hash and Enumerable. Given: #{model.class}"
end
end
end
end
end
end
Version data entries
26 entries across 26 versions & 1 rubygems