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module ActiveScaffold
module Helpers
module AssociationHelpers
# Provides a way to honor the :conditions on an association while searching the association's klass
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
def association_options_count(association, conditions = nil)
association.klass.where(conditions).where(association.options[:conditions]).count
end
# returns options for the given association as a collection of [id, label] pairs intended for the +options_for_select+ helper.
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
def options_for_association_count(association)
association_options_count(association, options_for_association_conditions(association))
end
# 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.
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
end
end
end
Version data entries
37 entries across 37 versions & 1 rubygems