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module ActiveRecordSurvey
# Rank in relation to parent/children of ActiveRecordSurvey::Node::Answer::Rank
class Node::Answer::Rank < Node::Answer
include Answer::Chained::InstanceMethods
extend Answer::Chained::ClassMethods
# Accept integer or empty values
# Must be within range of the number of ranking nodes
def validate_instance_node(instance_node)
# super - all validations on this node pass
super &&
(instance_node.value.to_s.empty? || !instance_node.value.to_s.match(/^\d+$/).nil?) &&
(instance_node.value.to_s.empty? || instance_node.value.to_i >= 1) &&
instance_node.value.to_i <= self.max_rank
end
# Rank answers are considered answered if they have a value of greater than "0"
def is_answered_for_instance?(instance)
if instance_node = self.instance_node_for_instance(instance)
# Answered if > 0
instance_node.value.to_i > 0
end
end
protected
# Calculate the number of Rank nodes above this one
def num_above
count = 0
self.node_maps.each { |i|
# Parent is one of us as well - include it and check its parents
if i.parent.node.class.ancestors.include?(self.class)
count = count + 1 + i.parent.node.num_above
end
}
count
end
# Calculate the number of Rank nodes below this one
def num_below
count = 0
self.node_maps.each { |node_map|
node_map.children.each { |child|
# Child is one of us as well - include it and check its children
if child.node.class.ancestors.include?(self.class)
count = count + 1 + child.node.num_below
end
}
}
count
end
# Calculate the maximum rank value that is accepted
def max_rank
self.num_above + self.num_below + 1
end
end
end
Version data entries
20 entries across 20 versions & 1 rubygems