X-Git-Url: https://git.openstreetmap.org./rails.git/blobdiff_plain/2d6c36d97bc8c39673be8efbab11ca64de1e89a2..dbe165bbb3d6eda37d9579f1ac767599f9055607:/app/models/old_way.rb diff --git a/app/models/old_way.rb b/app/models/old_way.rb index bb267dffb..c86590ed9 100644 --- a/app/models/old_way.rb +++ b/app/models/old_way.rb @@ -1,114 +1,139 @@ class OldWay < ActiveRecord::Base - set_table_name 'ways' + include ConsistencyValidations + include ObjectMetadata - belongs_to :user + self.table_name = "ways" + self.primary_keys = "way_id", "version" + + # note this needs to be included after the table name changes, or + # the queries generated by Redactable will use the wrong table name. + include Redactable + + belongs_to :changeset + belongs_to :redaction + belongs_to :current_way, :class_name => "Way", :foreign_key => "way_id" + + has_many :old_nodes, :class_name => "OldWayNode", :foreign_key => [:way_id, :version] + has_many :old_tags, :class_name => "OldWayTag", :foreign_key => [:way_id, :version] + + validates :changeset, :presence => true, :associated => true + validates :timestamp, :presence => true + validates :visible, :inclusion => [true, false] def self.from_way(way) old_way = OldWay.new old_way.visible = way.visible - old_way.user_id = way.user_id + old_way.changeset_id = way.changeset_id old_way.timestamp = way.timestamp - old_way.id = way.id + old_way.way_id = way.id + old_way.version = way.version old_way.nds = way.nds old_way.tags = way.tags - return old_way + old_way end def save_with_dependencies! - - # dont touch this unless you really have figured out why it's called - # (Rails doesn't deal well with the old ways table (called 'ways') because - # it doesn't have a unique key. It knows how to insert and auto_increment - # id and get it back but we have that and we want to get the 'version' back - # we could add another column but thats a lot of data. No, set_primary_key - # doesn't work either. save! - clear_aggregation_cache - clear_association_cache - @attributes.update(OldWay.find(:first, :conditions => ['id = ? AND timestamp = ?', self.id, self.timestamp]).instance_variable_get('@attributes')) - - # ok, you can touch from here on - self.tags.each do |k,v| + tags.each do |k, v| tag = OldWayTag.new tag.k = k tag.v = v - tag.id = self.id - tag.version = self.version + tag.way_id = way_id + tag.version = version tag.save! end - i = 1 - self.nds.each do |n| + sequence = 1 + nds.each do |n| nd = OldWayNode.new - nd.id = self.id + nd.id = [way_id, version, sequence] nd.node_id = n - nd.sequence_id = i - nd.version = self.version nd.save! - i += 1 + sequence += 1 end end def nds - unless @nds - @nds = Array.new - OldWayNode.find(:all, :conditions => ["id = ? AND version = ?", self.id, self.version], :order => "sequence_id").each do |nd| - @nds += [nd.node_id] - end - end - @nds + @nds ||= old_nodes.order(:sequence_id).collect(&:node_id) end def tags - unless @tags - @tags = Hash.new - OldWayTag.find(:all, :conditions => ["id = ? AND version = ?", self.id, self.version]).each do |tag| - @tags[tag.k] = tag.v - end + @tags ||= Hash[old_tags.collect { |t| [t.k, t.v] }] + end + + attr_writer :nds + + attr_writer :tags + + def to_xml_node(changeset_cache = {}, user_display_name_cache = {}) + el = XML::Node.new "way" + el["id"] = way_id.to_s + + add_metadata_to_xml_node(el, self, changeset_cache, user_display_name_cache) + + old_nodes.each do |nd| # FIXME: need to make sure they come back in the right order + node_el = XML::Node.new "nd" + node_el["ref"] = nd.node_id.to_s + el << node_el end - @tags = Hash.new unless @tags - @tags + + add_tags_to_xml_node(el, old_tags) + + el end - def nds=(s) - @nds = s + # Read full version of old way + # For get_nodes_undelete, uses same nodes, even if they've moved since + # For get_nodes_revert, allocates new ids + # Currently returns Potlatch-style array + # where [5] indicates whether latest version is usable as is (boolean) + # (i.e. is it visible? are we actually reverting to an earlier version?) + + def get_nodes_undelete + nds.collect do |n| + node = Node.find(n) + [node.lon, node.lat, n, node.version, node.tags_as_hash, node.visible] + end end - def tags=(t) - @tags = t + def get_nodes_revert(timestamp) + points = [] + nds.each do |n| + oldnode = OldNode.where("node_id = ? AND timestamp <= ?", n, timestamp).unredacted.order("timestamp DESC").first + curnode = Node.find(n) + id = n + reuse = curnode.visible + if oldnode.lat != curnode.lat || oldnode.lon != curnode.lon || oldnode.tags != curnode.tags + # node has changed: if it's in other ways, give it a new id + if curnode.ways - [way_id] + id = -1 + reuse = false + end + end + points << [oldnode.lon, oldnode.lat, id, curnode.version, oldnode.tags_as_hash, reuse] + end + points end -# has_many :way_nodes, :class_name => 'OldWayNode', :foreign_key => 'id' -# has_many :way_tags, :class_name => 'OldWayTag', :foreign_key => 'id' + # Temporary method to match interface to nodes + def tags_as_hash + tags + end - def old_nodes - OldWayNode.find(:all, :conditions => ['id = ? AND version = ?', self.id, self.version]) + # Temporary method to match interface to ways + def way_nodes + old_nodes end - def old_tags - OldWayTag.find(:all, :conditions => ['id = ? AND version = ?', self.id, self.version]) + # Pretend we're not in any relations + def containing_relation_members + [] end - def to_xml_node - el1 = XML::Node.new 'way' - el1['id'] = self.id.to_s - el1['visible'] = self.visible.to_s - el1['timestamp'] = self.timestamp.xmlschema - el1['user'] = self.user.display_name if self.user.data_public? - - self.old_nodes.each do |nd| # FIXME need to make sure they come back in the right order - e = XML::Node.new 'nd' - e['id'] = nd.node_id.to_s - el1 << e - end - - self.old_tags.each do |tag| - e = XML::Node.new 'tag' - e['k'] = tag.k - e['v'] = tag.v - el1 << e - end - return el1 - end + # check whether this element is the latest version - that is, + # has the same version as its "current" counterpart. + def is_latest_version? + current_way.version == version + end end