Potential fix for slow relation precondition checking based on Frederik's suggestion...

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

diff --git a/app/models/old_way.rb b/app/models/old_way.rb
index 1abb23bbbac13292b4f5f6949781b5cd4b55ff8f..425478a5b93a81586d6849081fc296f4583bf680 100644 (file)
--- a/app/models/old_way.rb
+++ b/app/models/old_way.rb
@@ -1,14 +1,19 @@
 class OldWay < ActiveRecord::Base
 class OldWay < ActiveRecord::Base

+  include ConsistencyValidations
+  

   set_table_name 'ways'
 
   set_table_name 'ways'
 

-  belongs_to :user
+  belongs_to :changeset

 
 

+  validates_associated :changeset
+  

   def self.from_way(way)
     old_way = OldWay.new
     old_way.visible = way.visible
   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.timestamp = way.timestamp
     old_way.id = way.id

+    old_way.version = way.version

     old_way.nds = way.nds
     old_way.tags = way.tags
     return old_way
     old_way.nds = way.nds
     old_way.tags = way.tags
     return old_way


@@ -93,7 +98,12 @@ class OldWay < ActiveRecord::Base
     el1['id'] = self.id.to_s
     el1['visible'] = self.visible.to_s
     el1['timestamp'] = self.timestamp.xmlschema
     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?
+    if self.changeset.user.data_public?
+      el1['user'] = self.changeset.user.display_name
+      el1['uid'] = self.changeset.user.id.to_s
+    end
+    el1['version'] = self.version.to_s
+    el1['changeset'] = self.changeset.id.to_s

     
     self.old_nodes.each do |nd| # FIXME need to make sure they come back in the right order
       e = XML::Node.new 'nd'
     
     self.old_nodes.each do |nd| # FIXME need to make sure they come back in the right order
       e = XML::Node.new 'nd'


@@ -110,6 +120,37 @@ class OldWay < ActiveRecord::Base
     return el1
   end
 
     return el1
   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
+       points = []
+       self.nds.each do |n|
+         node=Node.find(n)
+         points << [node.lon, node.lat, n, node.version, node.tags_as_hash, node.visible]
+    end
+       points
+  end
+  
+  def get_nodes_revert(timestamp)
+    points=[]
+    self.nds.each do |n|
+      oldnode=OldNode.find(:first, :conditions=>['id=? AND timestamp<=?',n,timestamp], :order=>"timestamp DESC")
+      curnode=Node.find(n)
+      id=n; reuse=curnode.visible
+      if oldnode.lat!=curnode.lat or oldnode.lon!=curnode.lon or oldnode.tags!=curnode.tags then
+        # node has changed: if it's in other ways, give it a new id
+        if curnode.ways-[self.id] then id=-1; reuse=false end
+      end
+      points << [oldnode.lon, oldnode.lat, id, curnode.version, oldnode.tags_as_hash, reuse]
+    end
+    points
+  end
+

   # Temporary method to match interface to nodes
   def tags_as_hash
     return self.tags
   # Temporary method to match interface to nodes
   def tags_as_hash
     return self.tags