Merge remote-tracking branch 'upstream/pull/4747'

[rails.git] / app / models / old_way.rb

diff --git a/app/models/old_way.rb b/app/models/old_way.rb
index b515322e325cc1aed3face1f1f44166fa2f9b171..8577330c52823dd808e5128b7047f7a17dcd9c5a 100644 (file)
--- a/app/models/old_way.rb
+++ b/app/models/old_way.rb
@@ -2,7 +2,7 @@
 #
 # Table name: ways
 #
-#  way_id       :bigint(8)        default(0), not null, primary key
+#  way_id       :bigint(8)        not null, primary key
 #  changeset_id :bigint(8)        not null
 #  timestamp    :datetime         not null
 #  version      :bigint(8)        not null, primary key
@@ -21,24 +21,20 @@
 #
 
 class OldWay < ApplicationRecord
-  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
+  # 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"
+  belongs_to :redaction, :optional => true
+  belongs_to :current_way, :class_name => "Way", :foreign_key => "way_id", :inverse_of => :old_ways
 
-  has_many :old_nodes, :class_name => "OldWayNode", :foreign_key => [:way_id, :version]
-  has_many :old_tags, :class_name => "OldWayTag", :foreign_key => [:way_id, :version]
+  has_many :old_nodes, :class_name => "OldWayNode", :query_constraints => [:way_id, :version], :inverse_of => :old_way
+  has_many :old_tags, :class_name => "OldWayTag", :query_constraints => [:way_id, :version], :inverse_of => :old_way
 
-  validates :changeset, :presence => true, :associated => true
+  validates :changeset, :associated => true
   validates :timestamp, :presence => true
   validates :visible, :inclusion => [true, false]
 
@@ -81,62 +77,10 @@ class OldWay < ApplicationRecord
   end
 
   def tags
-    @tags ||= Hash[old_tags.collect { |t| [t.k, t.v] }]
+    @tags ||= old_tags.to_h { |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
+  attr_writer :nds, :tags
 
   # Temporary method to match interface to ways
   def way_nodes
@@ -150,7 +94,7 @@ class OldWay < ApplicationRecord
 
   # check whether this element is the latest version - that is,
   # has the same version as its "current" counterpart.
-  def is_latest_version?
+  def latest_version?
     current_way.version == version
   end
 end