+# == Schema Information
+#
+# Table name: ways
+#
+# way_id :integer default(0), not null, primary key
+# changeset_id :integer not null
+# timestamp :datetime not null
+# version :integer not null, primary key
+# visible :boolean default(TRUE), not null
+# redaction_id :integer
+#
+# Indexes
+#
+# ways_changeset_id_idx (changeset_id)
+# ways_timestamp_idx (timestamp)
+#
+# Foreign Keys
+#
+# ways_changeset_id_fkey (changeset_id => changesets.id)
+# ways_redaction_id_fkey (redaction_id => redactions.id)
+#
+
class OldWay < ActiveRecord::Base
- set_table_name 'ways'
+ include ConsistencyValidations
+ include ObjectMetadata
+
+ 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 :user
+ 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.user_id = way.user_id
+ old_way.visible = way.visible
+ old_way.changeset_id = way.changeset_id
old_way.timestamp = way.timestamp
- old_way.id = way.id
- old_way.segs = way.segs
+ 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
- t = Time.now
- self.timestamp = t
- self.save
-
- self.tags.each do |k,v|
+ def save_with_dependencies!
+ save!
+
+ tags.each do |k, v|
tag = OldWayTag.new
tag.k = k
tag.v = v
- tag.id = self.id
- tag.save
+ tag.way_id = way_id
+ tag.version = version
+ tag.save!
end
- i = 0
- self.segs.each do |n|
- seg = OldWaySegment.new
- seg.id = self.id
- seg.segment_id = n
- seg.sequence_id = i
- seg.save
- i += 1
+ sequence = 1
+ nds.each do |n|
+ nd = OldWayNode.new
+ nd.id = [way_id, version, sequence]
+ nd.node_id = n
+ nd.save!
+ sequence += 1
end
-
- old_way = OldWay.from_way(self)
- old_way.save
end
- def segs
- @segs = Array.new unless @segs
- @segs
+ def nds
+ @nds ||= old_nodes.order(:sequence_id).collect(&:node_id)
end
def tags
- @tags = Hash.new unless @tags
- @tags
+ @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
+
+ add_tags_to_xml_node(el, old_tags)
+
+ el
+ end
+
+ # 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 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
- def segs=(s)
- @segs = s
+ # Temporary method to match interface to ways
+ def way_nodes
+ old_nodes
end
- def tags=(t)
- @tags = t
+ # Pretend we're not in any relations
+ def containing_relation_members
+ []
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
projects / rails.git / blobdiff