Class: ActiveRecord::DynamicFinderMatch

Inherits:
Object
  • Object
show all
Defined in:
activerecord/lib/active_record/dynamic_finder_match.rb

Overview

Active Record Dynamic Finder Match

Refer to ActiveRecord::Base documentation for Dynamic attribute-based finders for detailed info

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(finder, instantiator, bang, attribute_names) ⇒ DynamicFinderMatch

Returns a new instance of DynamicFinderMatch.



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

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

Instance Attribute Details

#attribute_names ⇒ Object (readonly)

Returns the value of attribute attribute_names



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# File 'activerecord/lib/active_record/dynamic_finder_match.rb', line 42

def attribute_names
  @attribute_names
end

#finder ⇒ Object (readonly)

Returns the value of attribute finder



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# File 'activerecord/lib/active_record/dynamic_finder_match.rb', line 42

def finder
  @finder
end

#instantiator ⇒ Object (readonly)

Returns the value of attribute instantiator



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# File 'activerecord/lib/active_record/dynamic_finder_match.rb', line 42

def instantiator
  @instantiator
end

Class Method Details

.match(method) ⇒ Object 



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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 = $1
  when /^find_or_create_by_([_a-zA-Z]\w*)\!$/
    bang = true
    instantiator = :create
    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

Instance Method Details

#bang? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'activerecord/lib/active_record/dynamic_finder_match.rb', line 56

def bang?
  @bang
end

#creator? ⇒ Boolean

Returns:

  • (Boolean) 


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

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

#finder? ⇒ Boolean

Returns:

  • (Boolean) 


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

def finder?
  @finder && !@instantiator
end

#instantiator? ⇒ Boolean

Returns:

  • (Boolean) 


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

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

#save_method ⇒ Object 



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# File 'activerecord/lib/active_record/dynamic_finder_match.rb', line 64

def save_method
  bang? ? :save! : :save
end

#save_record? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'activerecord/lib/active_record/dynamic_finder_match.rb', line 60

def save_record?
  @instantiator == :create
end