Class: ActiveModel::AttributeMethods::ClassMethods::AttributeMethodMatcher

Inherits:
Object
  • Object
show all
Defined in:
lib/active_model/attribute_methods.rb

Defined Under Namespace

Classes: AttributeMethodMatch

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(options = {}) ⇒ AttributeMethodMatcher

Returns a new instance of AttributeMethodMatcher.



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# File 'lib/active_model/attribute_methods.rb', line 355

def initialize(options = {})
  options.symbolize_keys!

  if options[:prefix] == '' || options[:suffix] == ''
    ActiveSupport::Deprecation.warn(
      "Specifying an empty prefix/suffix for an attribute method is no longer " \
      "necessary. If the un-prefixed/suffixed version of the method has not been " \
      "defined when `define_attribute_methods` is called, it will be defined " \
      "automatically."
    )
  end

  @prefix, @suffix = options[:prefix] || '', options[:suffix] || ''
  @regex = /^(#{Regexp.escape(@prefix)})(.+?)(#{Regexp.escape(@suffix)})$/
  @method_missing_target = "#{@prefix}attribute#{@suffix}"
  @method_name = "#{prefix}%s#{suffix}"
end

Instance Attribute Details

#method_missing_target ⇒ Object (readonly)

Returns the value of attribute method_missing_target.



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# File 'lib/active_model/attribute_methods.rb', line 351

def method_missing_target
  @method_missing_target
end

#prefix ⇒ Object (readonly)

Returns the value of attribute prefix.



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# File 'lib/active_model/attribute_methods.rb', line 351

def prefix
  @prefix
end

#suffix ⇒ Object (readonly)

Returns the value of attribute suffix.



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# File 'lib/active_model/attribute_methods.rb', line 351

def suffix
  @suffix
end

Instance Method Details

#match(method_name) ⇒ Object 



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# File 'lib/active_model/attribute_methods.rb', line 373

def match(method_name)
  if @regex =~ method_name
    AttributeMethodMatch.new(method_missing_target, $2, method_name)
  else
    nil
  end
end

#method_name(attr_name) ⇒ Object 



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# File 'lib/active_model/attribute_methods.rb', line 381

def method_name(attr_name)
  @method_name % attr_name
end

#plain? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/active_model/attribute_methods.rb', line 385

def plain?
  prefix.empty? && suffix.empty?
end