module ActiveScaffold::Actions::Nested

The Nested module basically handles automatically linking controllers together. It does this by creating column links with the right parameters, and by providing any supporting systems (like a /:controller/nested action for returning associated scaffolds).

Public Class Methods

included(base) click to toggle source
Calls superclass method
# File lib/active_scaffold/actions/nested.rb, line 5
def self.included(base)
  super
  base.module_eval do
    before_filter :register_constraints_with_action_columns
    before_filter :set_nested
    before_filter :configure_nested
    include ActiveScaffold::Actions::Nested::ChildMethods if active_scaffold_config.model.reflect_on_all_associations.any? {|a| a.macro == :has_and_belongs_to_many}
  end
  base.before_filter :include_habtm_actions
  base.helper_method :nested
  base.helper_method :nested_parent_record
end

Protected Instance Methods

beginning_of_chain() click to toggle source
# File lib/active_scaffold/actions/nested.rb, line 84
def beginning_of_chain
  if nested? && nested.association && !nested.association.belongs_to?
    if nested.association.collection?
      nested.parent_scope.send(nested.association.name)
    elsif nested.child_association.belongs_to?
      active_scaffold_config.model.where(nested.child_association.foreign_key => nested.parent_scope)
    end
  elsif nested? && nested.scope
    nested.parent_scope.send(nested.scope)
  else
    active_scaffold_config.model
  end
end
configure_nested() click to toggle source
# File lib/active_scaffold/actions/nested.rb, line 42
def configure_nested
  if nested?
    active_scaffold_session_storage[:list][:label] =  if nested.belongs_to?
      as_(:nested_of_model, :nested_model => active_scaffold_config.model.model_name.human, :parent_model => nested_parent_record.to_label)
    else
      as_(:nested_for_model, :nested_model => active_scaffold_config.list.label, :parent_model => nested_parent_record.to_label)
    end
    if nested.sorted?
      active_scaffold_config.list.user.nested_default_sorting = {:table_name => active_scaffold_config.model.model_name, :default_sorting => nested.default_sorting}
    end
  end
end
create_association_with_parent(record) click to toggle source
# File lib/active_scaffold/actions/nested.rb, line 102
def create_association_with_parent(record)
  if nested?
    if (nested.belongs_to? || nested.has_one? || nested.habtm?) && nested.child_association
      parent = nested_parent_record(:read)
      case nested.child_association.macro
      when :has_one
        record.send("#{nested.child_association.name}=", parent)
      when :belongs_to
        record.send("#{nested.child_association.name}=", parent)
      when :has_many, :has_and_belongs_to_many
        record.send("#{nested.child_association.name}").send(:<<, parent)
      end unless parent.nil?
    end
  end
end
include_habtm_actions() click to toggle source
# File lib/active_scaffold/actions/nested.rb, line 59
def include_habtm_actions
  if nested?
    if nested.habtm?
      # Production mode is ok with adding a link everytime the scaffold is nested - we ar not ok with that.
      active_scaffold_config.action_links.add('new_existing', :label => :add_existing, :type => :collection, :security_method => :add_existing_authorized?) unless active_scaffold_config.action_links['new_existing']
      if active_scaffold_config.nested.shallow_delete
        active_scaffold_config.action_links.add('destroy_existing', :label => :remove, :type => :member, :confirm => :are_you_sure_to_delete, :method => :delete, :position => false, :security_method => :delete_existing_authorized?) unless active_scaffold_config.action_links['destroy_existing']
        if active_scaffold_config.actions.include?(:delete)
          active_scaffold_config.action_links.delete("delete") if active_scaffold_config.action_links['delete']
        end
      end
    else
      # Production mode is caching this link into a non nested scaffold
      active_scaffold_config.action_links.delete('new_existing') if active_scaffold_config.action_links['new_existing']
      
      if active_scaffold_config.nested.shallow_delete
        active_scaffold_config.action_links.delete("destroy_existing") if active_scaffold_config.action_links['destroy_existing']
        if active_scaffold_config.actions.include?(:delete)
          active_scaffold_config.action_links.add(ActiveScaffold::Config::Delete.link) unless active_scaffold_config.action_links['delete']
        end
      end
    end
  end
end
nested() click to toggle source
# File lib/active_scaffold/actions/nested.rb, line 19
def nested
  @nested ||= ActiveScaffold::DataStructures::NestedInfo.get(active_scaffold_config.model, active_scaffold_session_storage)
  if !@nested.nil? && @nested.new_instance?
    register_constraints_with_action_columns(@nested.constrained_fields,  active_scaffold_config.list.hide_nested_column ? [] : [:list])
    active_scaffold_constraints[:id] = params[:id] if @nested.belongs_to?
  end
  @nested
end
nested?() click to toggle source
# File lib/active_scaffold/actions/nested.rb, line 28
def nested?
  !nested.nil?
end
nested_authorized?(record = nil) click to toggle source
# File lib/active_scaffold/actions/nested.rb, line 55
def nested_authorized?(record = nil)
  true
end
nested_parent_record(crud = :read) click to toggle source
# File lib/active_scaffold/actions/nested.rb, line 98
def nested_parent_record(crud = :read)
  @nested_parent_record ||= find_if_allowed(nested.parent_id, crud, nested.parent_model)
end
set_nested() click to toggle source
# File lib/active_scaffold/actions/nested.rb, line 32
def set_nested
  if params[:parent_scaffold] && ((params[:association] && params[:assoc_id]) || params[:named_scope])
    @nested = nil
    active_scaffold_session_storage[:nested] = {:parent_scaffold => params[:parent_scaffold].to_s,
                                                              :name => (params[:association] || params[:named_scope]).to_sym,
                                                              :parent_id => params[:assoc_id]}
    params.delete_if {|key, value| [:parent_scaffold, :association, :named_scope, :assoc_id].include? key.to_sym}
  end
end

Private Instance Methods

nested_formats() click to toggle source
# File lib/active_scaffold/actions/nested.rb, line 119
def nested_formats
  (default_formats + active_scaffold_config.formats + active_scaffold_config.nested.formats).uniq
end