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# File 'lib/mongoid/max/denormalize/many_to_one.rb', line 16
def attach
fields_only.each do |field|
klass.field "#{relation}_#{field}", type: Array, default: []
end
if has_count?
klass.field "#{relation}_count", type: Integer, default: 0
end
klass.before_create :"denormalize_from_#{relation}"
klass.class_eval " def denormalize_from_\#{relation}(force=false)\n \#{relation}_retrieved = nil\n\n fields = [\#{Base.array_code_for(fields_only)}]\n unless fields.empty?\n \#{relation}_retrieved = \#{relation}.unscoped.to_a\n if \#{relation}_retrieved.count > 0\n fields.each do |field|\n self.send(:\"\#{relation}_\\\#{field}=\", \#{relation}_retrieved.map(&field).compact)\n end\n end\n end\n\n if \#{has_count?}\n self.\#{relation}_count = \#{relation}_retrieved.nil? ? \#{relation}.unscoped.count : \#{relation}_retrieved.count\n end\n\n true\n end\n EOM\n\n klass.class_eval <<-EOM, __FILE__, __LINE__\n def self.denormalize_from_\#{relation}!\n all.entries.each do |obj|\n obj.denormalize_from_\#{relation}(true)\n obj.save!\n end\n\n nil\n end\n EOM\n\n #\n # Other side of the relation\n #\n inverse_klass.around_save :\"denormalize_to_\#{inverse_relation}\"\n\n inverse_klass.class_eval <<-EOM, __FILE__, __LINE__\n def denormalize_to_\#{inverse_relation}\n if !changed? && !new_record?\n yield if block_given?\n return\n end\n\n was_new = new_record?\n was_added = false\n was_removed = false\n\n fields = [\#{Base.array_code_for(fields_only)}]\n\n remote_id = send(:\#{inverse_meta.key})\n\n to_rem = {}\n to_add = {}\n if \#{inverse_meta.key}_changed?\n changed_fields = fields\n if !\#{inverse_meta.key}.nil? && !\#{inverse_meta.key}_was.nil?\n was_added = true\n changed_fields.each do |field|\n to_add[:\"\#{relation}_\\\#{field}\"] = send(field)\n end\n denormalize_to_\#{inverse_relation}_old\n else\n if \#{inverse_meta.key}_was.nil?\n was_added = true\n changed_fields.each do |field|\n to_add[:\"\#{relation}_\\\#{field}\"] = send(:\"\\\#{field}_changed?\") ? send(field) : send(:\"\\\#{field}_was\")\n end\n else\n was_removed = true\n remote_id = send(:\#{inverse_meta.key}_was)\n changed_fields.each do |field|\n to_rem[:\"\#{relation}_\\\#{field}\"] = send(:\"\\\#{field}_changed?\") ? send(:\"\\\#{field}_was\") : send(field)\n end\n end\n end\n elsif \#{inverse_meta.key}.nil?\n changed_fields = []\n else\n changed_fields = fields & changed.map(&:to_sym)\n changed_fields.each do |field|\n to_rem[:\"\#{relation}_\\\#{field}\"] = send(:\"\\\#{field}_was\")\n to_add[:\"\#{relation}_\\\#{field}\"] = send(field)\n end\n end\n\n yield if block_given?\n return if (changed_fields.empty? && !fields.empty?)\n\n to_update = { \"$set\" => {}, \"$inc\" => {}, \"$push\" => {} }\n to_get = {}\n\n to_rem_fields = to_rem.reject {|k,v| v.nil?}.keys\n to_add_fields = to_add.reject {|k,v| v.nil?}.keys\n\n # Those to add only\n (to_add_only_fields = to_add_fields - to_rem_fields).each do |field|\n to_update[\"$push\"][field] = to_add[field]\n end\n\n to_set_fields = (to_add_fields + to_rem_fields - to_add_only_fields).uniq\n\n to_get.merge! Hash[to_set_fields.map{ |f| [f, 1] }] unless to_set_fields.empty?\n\n obj = \#{klass}.collection.find(\"$query\" => {:_id => remote_id}, \"$only\" => to_get).first unless to_get.empty?\n\n to_set_fields.each do |field|\n array = obj[field.to_s] || []\n\n if to_rem_fields.include? field\n (i = array.index(to_rem[field])) and array.delete_at(i)\n end\n if to_add_fields.include? field\n array << to_add[field]\n end\n\n to_update[\"$set\"][field] = array\n end\n\n to_update[\"$inc\"][:\#{relation}_count] = 1 if \#{has_count?} && (was_new || was_added)\n to_update[\"$inc\"][:\#{relation}_count] = -1 if \#{has_count?} && (was_removed)\n\n to_update.reject! {|k,v| v.empty?}\n \#{klass}.denormalize_update_all({:_id => remote_id}, to_update) unless to_update.empty?\n end\n EOM\n\n inverse_klass.class_eval <<-EOM, __FILE__, __LINE__\n def denormalize_to_\#{inverse_relation}_old\n fields = [\#{Base.array_code_for(fields_only)}]\n\n remote_id = send(:\#{inverse_meta.key}_was)\n\n to_rem = {}\n fields.each do |field|\n to_rem[:\"\#{relation}_\\\#{field}\"] = send(:\"\\\#{field}_was\")\n end\n\n to_update = { \"$set\" => {}, \"$inc\" => {}, \"$push\" => {} }\n to_get = {}\n\n to_rem_fields = to_rem.reject {|k,v| v.nil?}.keys\n\n to_set_fields = to_rem_fields\n\n to_get.merge! Hash[to_set_fields.map{ |f| [f, 1] }] unless to_set_fields.empty?\n\n obj = \#{klass}.collection.find(\"$query\" => {:_id => remote_id}, \"$only\" => to_get).first unless to_get.empty?\n\n to_set_fields.each do |field|\n array = obj[field.to_s] || []\n\n if to_rem_fields.include? field\n (i = array.index(to_rem[field])) and array.delete_at(i)\n end\n\n to_update[\"$set\"][field] = array\n end\n\n to_update[\"$inc\"][:\#{relation}_count] = -1 if \#{has_count?}\n\n to_update.reject! {|k,v| v.empty?}\n \#{klass}.denormalize_update_all({:_id => remote_id}, to_update) unless to_update.empty?\n end\n EOM\n\n\n inverse_klass.around_destroy :\"denormalize_to_\#{inverse_relation}_destroy\"\n\n inverse_klass.class_eval <<-EOM, __FILE__, __LINE__\n def denormalize_to_\#{inverse_relation}_destroy\n fields = [\#{Base.array_code_for(fields)}]\n\n remote_id = send(:\#{inverse_meta.key})\n\n to_rem = {}\n fields.each do |field|\n to_rem[:\"\#{relation}_\\\#{field}\"] = send(field)\n end\n\n yield if block_given?\n\n to_update = { \"$set\" => {}, \"$inc\" => {}, \"$push\" => {} }\n to_get = {}\n\n to_rem_fields = to_rem.reject {|k,v| v.nil?}.keys\n\n to_get.merge! Hash[to_rem_fields.map{ |f| [f, 1] }]\n obj = \#{klass}.collection.find(\"$query\" => {:_id => remote_id}, \"$only\" => to_get).first unless to_get.empty?\n\n to_rem_fields.each do |field|\n array = obj[field.to_s] || []\n\n if to_rem_fields.include? field\n (i = array.index(to_rem[field])) and array.delete_at(i)\n end\n\n to_update[\"$set\"][field] = array\n end\n\n to_update[\"$inc\"][:\#{relation}_count] = -1 if \#{has_count?}\n\n to_update.reject! {|k,v| v.empty?}\n \#{klass}.denormalize_update_all({:_id => remote_id}, to_update) unless to_update.empty?\n end\n EOM\nend\n", __FILE__, __LINE__
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