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Contents
module RecordCache
class Scope
attr_reader :model_class, :query
def initialize(model_class, query)
@model_class = model_class
@query = query
end
def empty?
query.empty?
end
def fields
query.keys
end
def match_current?(model)
fields.all? do |field|
match?( field, model.send(field) )
end
end
def match_previous?(model)
fields.all? do |field|
match?( field, model.attr_was(field) )
end
end
def match?(field, value)
scope = query[field]
if defined?(AntiObject) and scope.kind_of?(AntiObject)
scope = ~scope
invert = true
end
match = [*scope].include?(value)
invert ? !match : match
end
def conditions
@conditions ||= begin
query.collect do |field, scope|
if defined?(AntiObject) and scope.kind_of?(AntiObject)
scope = ~scope
invert = true
end
if scope.nil?
op = invert ? 'IS NOT' : 'IS'
"#{field} #{op} NULL"
elsif scope.is_a?(Array)
op = invert ? 'NOT IN' : 'IN'
model_class.send(:sanitize_sql, ["#{field} #{op} (?)", scope])
else
op = invert ? '!=' : '='
model_class.send(:sanitize_sql, ["#{field} #{op} ?", scope])
end
end.join(' AND ')
end
@conditions
end
end
end
Version data entries
10 entries across 10 versions & 2 rubygems