Class: ActiveModelCachers::ActiveRecord::AttrModel

Inherits:
Object
  • Object
show all
Defined in:
lib/active_model_cachers/active_record/attr_model.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(klass, column, primary_key: nil, foreign_key: nil) ⇒ AttrModel

Returns a new instance of AttrModel.



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# File 'lib/active_model_cachers/active_record/attr_model.rb', line 7

def initialize(klass, column, primary_key: nil, foreign_key: nil)
  @klass = klass
  @column = column
  @primary_key = primary_key
  @foreign_key = foreign_key
  @reflect = klass.reflect_on_association(column)
end

Instance Attribute Details

#column ⇒ Object (readonly)

Returns the value of attribute column.



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# File 'lib/active_model_cachers/active_record/attr_model.rb', line 5

def column
  @column
end

#klass ⇒ Object (readonly)

Returns the value of attribute klass.



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# File 'lib/active_model_cachers/active_record/attr_model.rb', line 5

def klass
  @klass
end

#reflect ⇒ Object (readonly)

Returns the value of attribute reflect.



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# File 'lib/active_model_cachers/active_record/attr_model.rb', line 5

def reflect
  @reflect
end

Instance Method Details

#association? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/active_model_cachers/active_record/attr_model.rb', line 15

def association?
  return (@reflect != nil)
end

#belongs_to? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/active_model_cachers/active_record/attr_model.rb', line 44

def belongs_to?
  return false if not association?
  return @reflect.belongs_to?
end

#class_name ⇒ Object 



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# File 'lib/active_model_cachers/active_record/attr_model.rb', line 19

def class_name
  return if not association?
  return @reflect.class_name
end

#collection? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/active_model_cachers/active_record/attr_model.rb', line 76

def collection?
  return false if not association?
  return @reflect.collection?
end

#extract_class_and_column ⇒ Object 



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# File 'lib/active_model_cachers/active_record/attr_model.rb', line 87

def extract_class_and_column
  return [class_name, nil] if single_association?
  return [@klass.to_s, @column]
end

#foreign_key(reverse: false) ⇒ Object 



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# File 'lib/active_model_cachers/active_record/attr_model.rb', line 63

def foreign_key(reverse: false)
  return @foreign_key if @foreign_key
  return if not association?
  # key may be symbol if specify foreign_key in association options
  return @reflect.chain.last.foreign_key.to_s if reverse and join_table
  return (@reflect.belongs_to? == reverse ? primary_key : @reflect.foreign_key).to_s
end

#has_one? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/active_model_cachers/active_record/attr_model.rb', line 49

def has_one?
  return false if not association?
  #return @reflect.has_one? # Rails 3 doesn't have this method
  return false if @reflect.collection?
  return false if @reflect.belongs_to?
  return true
end

#join_table ⇒ Object 



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# File 'lib/active_model_cachers/active_record/attr_model.rb', line 24

def join_table
  return nil if @reflect == nil
  options = @reflect.options
  return options[:through] if options[:through]
  return (options[:join_table] || @reflect.send(:derive_join_table)) if @reflect.macro == :has_and_belongs_to_many
  return nil
end

#join_table_class_name ⇒ Object 



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# File 'lib/active_model_cachers/active_record/attr_model.rb', line 32

def join_table_class_name
  join_table.try{|table_name| @klass.reflect_on_association(table_name).try(:class_name)  || through_klass.name }
end

#primary_key ⇒ Object 



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# File 'lib/active_model_cachers/active_record/attr_model.rb', line 57

def primary_key
  return @primary_key if @primary_key
  return if not association?
  return (@reflect.belongs_to? ? @reflect.klass : @reflect.active_record).primary_key
end

#query_model(binding, id) ⇒ Object 



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# File 'lib/active_model_cachers/active_record/attr_model.rb', line 81

def query_model(binding, id)
  return query_self(binding, id) if @column == nil
  return query_association(binding, id) if association?
  return query_attribute(binding, id)
end

#single_association? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/active_model_cachers/active_record/attr_model.rb', line 71

def single_association?
  return false if not association?
  return !collection?
end

#through_klass ⇒ Object 



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# File 'lib/active_model_cachers/active_record/attr_model.rb', line 40

def through_klass
  through_reflection.try(:klass) || through_klass_for_rails_3
end

#through_reflection ⇒ Object 



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# File 'lib/active_model_cachers/active_record/attr_model.rb', line 36

def through_reflection
  @klass.new.association(@column).reflection.through_reflection
end