Class: ActiveRecord::DynamicFinderMatch

Inherits:

Object

• Object
• ActiveRecord::DynamicFinderMatch

show all

Defined in:

activerecord/lib/active_record/dynamic_finder_match.rb

Overview

Instance Attribute Summary (collapse)

• - (Object) attribute_names readonly

  Returns the value of attribute attribute_names.

• - (Object) finder readonly

  Returns the value of attribute finder.

• - (Object) instantiator readonly

  Returns the value of attribute instantiator.

Class Method Summary (collapse)

• + (Object) match(method)

Instance Method Summary (collapse)

• - (Boolean) bang?
• - (Boolean) creator?
• - (Boolean) finder?
• - (DynamicFinderMatch) initialize(finder, instantiator, bang, attribute_names) constructor

  A new instance of DynamicFinderMatch.

• - (Boolean) instantiator?

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# File 'activerecord/lib/active_record/dynamic_finder_match.rb', line 31

def initialize(finder, instantiator, bang, attribute_names)
  @finder          = finder
  @instantiator    = instantiator
  @bang            = bang
  @attribute_names = attribute_names
end

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# File 'activerecord/lib/active_record/dynamic_finder_match.rb', line 38

def attribute_names
  @attribute_names
end

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# File 'activerecord/lib/active_record/dynamic_finder_match.rb', line 38

def finder
  @finder
end

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# File 'activerecord/lib/active_record/dynamic_finder_match.rb', line 38

def instantiator
  @instantiator
end

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# File 'activerecord/lib/active_record/dynamic_finder_match.rb', line 8

def self.match(method)
  finder       = :first
  bang         = false
  instantiator = nil

  case method.to_s
  when /^find_(all_|last_)?by_([_a-zA-Z]\w*)$/
    finder = :last if $1 == 'last_'
    finder = :all if $1 == 'all_'
    names = $2
  when /^find_by_([_a-zA-Z]\w*)\!$/
    bang = true
    names = $1
  when /^find_or_(initialize|create)_by_([_a-zA-Z]\w*)$/
    instantiator = $1 == 'initialize' ? :new : :create
    names = $2
  else
    return nil
  end

  new(finder, instantiator, bang, names.split('_and_'))
end

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# File 'activerecord/lib/active_record/dynamic_finder_match.rb', line 52

def bang?
  @bang
end

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# File 'activerecord/lib/active_record/dynamic_finder_match.rb', line 48

def creator?
  @finder == :first && @instantiator == :create
end

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# File 'activerecord/lib/active_record/dynamic_finder_match.rb', line 40

def finder?
  @finder && !@instantiator
end

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# File 'activerecord/lib/active_record/dynamic_finder_match.rb', line 44

def instantiator?
  @finder == :first && @instantiator
end