Module: ActiveScaffold::Helpers::AssociationHelpers

Included in:
ViewHelpers
Defined in:
lib/active_scaffold/helpers/association_helpers.rb

Instance Method Summary collapse

Instance Method Details

#association_options_count(association, conditions = nil) ⇒ Object 



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# File 'lib/active_scaffold/helpers/association_helpers.rb', line 11

def association_options_count(association, conditions = nil)
  association.klass.where(conditions).where(association.options[:conditions]).count
end

#association_options_find(association, conditions = nil) ⇒ Object

Provides a way to honor the :conditions on an association while searching the association’s klass



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# File 'lib/active_scaffold/helpers/association_helpers.rb', line 5

def association_options_find(association, conditions = nil)
  relation = association.klass.where(conditions).where(association.options[:conditions])
  relation = relation.includes(association.options[:include]) if association.options[:include]
  relation.all
end

#options_for_association(association, include_all = false) ⇒ Object

returns options for the given association as a collection of [id, label] pairs intended for the options_for_select helper.



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# File 'lib/active_scaffold/helpers/association_helpers.rb', line 16

def options_for_association(association, include_all = false)
  available_records = association_options_find(association, include_all ? nil : options_for_association_conditions(association))
  available_records ||= []
  available_records.sort{|a,b| a.to_label <=> b.to_label}.collect { |model| [ model.to_label, model.id ] }
end

#options_for_association_conditions(association) ⇒ Object

A useful override for customizing the records present in an association dropdown. Should work in both the subform and form_ui=>:select modes. Check association.name to specialize the conditions per-column.



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# File 'lib/active_scaffold/helpers/association_helpers.rb', line 29

def options_for_association_conditions(association)
  return nil if association.options[:through]
  case association.macro
    when :has_one, :has_many
      # Find only orphaned objects
      "#{association.foreign_key} IS NULL"
    when :belongs_to, :has_and_belongs_to_many
      # Find all
      nil
  end
end

#options_for_association_count(association) ⇒ Object 



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# File 'lib/active_scaffold/helpers/association_helpers.rb', line 22

def options_for_association_count(association)
  association_options_count(association, options_for_association_conditions(association))
end