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 44

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

#association_options_find(association, conditions = nil, klass = 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 16

def association_options_find(association, conditions = nil, klass = nil)
  if klass.nil? && association.options[:polymorphic]
    class_name = @record.send(association.foreign_type)
    if class_name.present?
      klass = class_name.constantize
    else
      return []
    end
    cache = !block_given?
  else
    cache = !block_given? && klass.nil?
    klass ||= association.klass
  end

  conditions = options_for_association_conditions(association) if conditions.nil?
  cache_association_options(association, conditions, klass, cache) do
    relation = klass.where(conditions).where(association.options[:conditions])
    relation = relation.includes(association.options[:include]) if association.options[:include]
    relation = yield(relation) if block_given?
    relation.to_a
  end
end

#cache_association_options(association, conditions, klass, cache = true) ⇒ Object

Cache the optins for select



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

def cache_association_options(association, conditions, klass, cache = true)
  if active_scaffold_config.cache_association_options && cache
    @_associations_cache ||= Hash.new { |h,k| h[k] = {} }
    key = [association.name, association.active_record.name, klass.name].join('/')
    @_associations_cache[key][conditions] ||= yield
  else
    yield
  end
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 49

def options_for_association(association, include_all = false)
  ActiveSupport::Deprecation.warn "options_for_association should not be used, use association_options_find directly"
  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 63

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 56

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

#sorted_association_options_find(association, conditions = nil) ⇒ Object

Sorts the options for select



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# File 'lib/active_scaffold/helpers/association_helpers.rb', line 40

def sorted_association_options_find(association, conditions = nil)
  association_options_find(association, conditions).sort_by(&:to_label)
end