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(method) constructor

  A new instance of DynamicFinderMatch.

• - (Boolean) instantiator?

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# File 'activerecord/lib/active_record/dynamic_finder_match.rb', line 13

def initialize(method)
  @finder = :first
  @bang   = false
  @instantiator = nil

  case method.to_s
  when /^find_(all_by|last_by|by)_([_a-zA-Z]\w*)$/
    @finder = :last if $1 == 'last_by'
    @finder = :all if $1 == 'all_by'
    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
    @finder = nil
  end
  @attribute_names = names && names.split('_and_')
end

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# File 'activerecord/lib/active_record/dynamic_finder_match.rb', line 35

def attribute_names
  @attribute_names
end

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# File 'activerecord/lib/active_record/dynamic_finder_match.rb', line 35

def finder
  @finder
end

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# File 'activerecord/lib/active_record/dynamic_finder_match.rb', line 35

def instantiator
  @instantiator
end

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

def self.match(method)
  df_match = self.new(method)
  df_match.finder ? df_match : nil
end

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# File 'activerecord/lib/active_record/dynamic_finder_match.rb', line 49

def bang?
  @bang
end

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# File 'activerecord/lib/active_record/dynamic_finder_match.rb', line 45

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

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# File 'activerecord/lib/active_record/dynamic_finder_match.rb', line 37

def finder?
  !@finder.nil? && @instantiator.nil?
end

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# File 'activerecord/lib/active_record/dynamic_finder_match.rb', line 41

def instantiator?
  @finder == :first && !@instantiator.nil?
end