80 lines
2.4 KiB
Ruby
80 lines
2.4 KiB
Ruby
# The Inflector transforms words from singular to plural, class names to table names, modulized class names to ones without,
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# and class names to foreign keys.
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module Inflector
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extend self
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def pluralize(word)
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result = word.to_s.dup
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plural_rules.each do |(rule, replacement)|
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break if result.gsub!(rule, replacement)
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end
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return result
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end
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def singularize(word)
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result = word.to_s.dup
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singular_rules.each do |(rule, replacement)|
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break if result.gsub!(rule, replacement)
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end
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return result
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end
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def camelize(lower_case_and_underscored_word)
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lower_case_and_underscored_word.to_s.gsub(/(^|_)(.)/){$2.upcase}
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end
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def underscore(camel_cased_word)
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camel_cased_word.to_s.gsub(/([A-Z]+)([A-Z])/,'\1_\2').gsub(/([a-z])([A-Z])/,'\1_\2').downcase
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end
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def demodulize(class_name_in_module)
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class_name_in_module.to_s.gsub(/^.*::/, '')
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end
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def tableize(class_name)
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pluralize(underscore(class_name))
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end
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def classify(table_name)
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camelize(singularize(table_name))
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end
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def foreign_key(class_name, separate_class_name_and_id_with_underscore = true)
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Inflector.underscore(Inflector.demodulize(class_name)) +
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(separate_class_name_and_id_with_underscore ? "_id" : "id")
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end
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private
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def plural_rules #:doc:
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[
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[/(x|ch|ss|sh)$/, '\1es'], # search, switch, fix, box, process, address
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[/([^aeiouy]|qu)ies$/, '\1y'],
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[/([^aeiouy]|qu)y$/, '\1ies'], # query, ability, agency
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[/(?:([^f])fe|([lr])f)$/, '\1\2ves'], # half, safe, wife
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[/sis$/, 'ses'], # basis, diagnosis
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[/([ti])um$/, '\1a'], # datum, medium
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[/person$/, 'people'], # person, salesperson
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[/man$/, 'men'], # man, woman, spokesman
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[/child$/, 'children'], # child
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[/s$/, 's'], # no change (compatibility)
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[/$/, 's']
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]
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end
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def singular_rules #:doc:
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[
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[/(x|ch|ss)es$/, '\1'],
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[/movies$/, 'movie'],
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[/([^aeiouy]|qu)ies$/, '\1y'],
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[/([lr])ves$/, '\1f'],
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[/([^f])ves$/, '\1fe'],
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[/(analy|ba|diagno|parenthe|progno|synop|the)ses$/, '\1sis'],
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[/([ti])a$/, '\1um'],
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[/people$/, 'person'],
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[/men$/, 'man'],
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[/status$/, 'status'],
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[/children$/, 'child'],
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[/s$/, '']
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]
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end
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end |