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Contents
module DynamicFieldsets
# A clause in CNF expression for question dependencies
#
# @author Jeremiah Hemphill
class DependencyClause < ActiveRecord::Base
self.table_name = "dynamic_fieldsets_dependency_clauses"
belongs_to :dependency_group
has_many :dependencies
accepts_nested_attributes_for :dependencies, :allow_destroy => true
# hack to make saving through nested attributes work
validates_presence_of :dependency_group, :on => :update
# Evaluates the depdendencies in the claus by ORing them together
# Short circuit evaluation returns true as soon as possible
#
# @param [Hash] input_values A hash of fieldset_child_id:value pairs to test against
# @return [Boolean] True if one of the dependencies is true
def evaluate(input_values)
self.dependencies.each do |dependency|
if dependency.evaluate
return true
end
end
return false
end
def to_hash
return { "id" => self.id, "dependency_group_id" => self.dependency_group_id }
end
end
end
Version data entries
7 entries across 7 versions & 1 rubygems