Moved transaction boundary to cover used-by tests on deletion so that the database...

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

diff --git a/app/models/node.rb b/app/models/node.rb
index 3481e28ca4d2dfeb67ebde20100d6f7a26f76b44..e1ad818ddec0c53991690a3c52727d7a09af930f 100644 (file)
--- a/app/models/node.rb
+++ b/app/models/node.rb
@@ -6,11 +6,6 @@ class Node < ActiveRecord::Base
 
   set_table_name 'current_nodes'
 
-  validates_presence_of :changeset_id, :timestamp
-  validates_inclusion_of :visible, :in => [ true, false ]
-  validates_numericality_of :latitude, :longitude
-  validate :validate_position
-
   belongs_to :changeset
 
   has_many :old_nodes, :foreign_key => :id
@@ -26,6 +21,15 @@ class Node < ActiveRecord::Base
   has_many :containing_relation_members, :class_name => "RelationMember", :as => :member
   has_many :containing_relations, :class_name => "Relation", :through => :containing_relation_members, :source => :relation, :extend => ObjectFinder
 
+  validates_presence_of :id, :on => :update
+  validates_presence_of :timestamp,:version,  :changeset_id
+  validates_uniqueness_of :id
+  validates_inclusion_of :visible, :in => [ true, false ]
+  validates_numericality_of :latitude, :longitude, :changeset_id, :version, :integer_only => true
+  validates_numericality_of :id, :on => :update, :integer_only => true
+  validate :validate_position
+  validates_associated :changeset
+
   # Sanity check the latitude and longitude and add an error if it's broken
   def validate_position
     errors.add_to_base("Node is not in the world") unless in_world?
@@ -83,7 +87,7 @@ class Node < ActiveRecord::Base
 
     # version must be present unless creating
     return nil unless create or not pt['version'].nil?
-    node.version = pt['version'].to_i
+    node.version = create ? 0 : pt['version'].to_i
 
     unless create
       if pt['id'] != '0'
@@ -141,6 +145,9 @@ class Node < ActiveRecord::Base
       old_node.timestamp = t
       old_node.save_with_dependencies!
 
+      # tell the changeset we updated one element only
+      changeset.add_changes! 1
+
       # save the changeset in case of bounding box updates
       changeset.save!
     end
@@ -148,7 +155,14 @@ class Node < ActiveRecord::Base
 
   # Should probably be renamed delete_from to come in line with update
   def delete_with_history!(new_node, user)
-    if self.visible
+    unless self.visible
+      raise OSM::APIAlreadyDeletedError.new
+    end
+
+    # need to start the transaction here, so that the database can 
+    # provide repeatable reads for the used-by checks. this means it
+    # shouldn't be possible to get race conditions.
+    Node.transaction do
       check_consistency(self, new_node, user)
       if WayNode.find(:first, :joins => "INNER JOIN current_ways ON current_ways.id = current_way_nodes.id", :conditions => [ "current_ways.visible = ? AND current_way_nodes.node_id = ?", true, self.id ])
         raise OSM::APIPreconditionFailedError.new
@@ -157,14 +171,12 @@ class Node < ActiveRecord::Base
       else
         self.changeset_id = new_node.changeset_id
         self.visible = false
-
+        
         # update the changeset with the deleted position
         changeset.update_bbox!(bbox)
-
+        
         save_with_history!
       end
-    else
-      raise OSM::APIAlreadyDeletedError.new
     end
   end
 
@@ -222,7 +234,10 @@ class Node < ActiveRecord::Base
       user_display_name_cache[self.changeset.user_id] = nil
     end
 
-    el1['user'] = user_display_name_cache[self.changeset.user_id] unless user_display_name_cache[self.changeset.user_id].nil?
+    if not user_display_name_cache[self.changeset.user_id].nil?
+      el1['user'] = user_display_name_cache[self.changeset.user_id]
+      el1['uid'] = self.changeset.user_id.to_s
+    end
 
     self.tags.each do |k,v|
       el2 = XML::Node.new('tag')
@@ -264,6 +279,13 @@ class Node < ActiveRecord::Base
     @tags[k] = v
   end
 
+  ##
+  # are the preconditions OK? this is mainly here to keep the duck
+  # typing interface the same between nodes, ways and relations.
+  def preconditions_ok?
+    in_world?
+  end
+
   ##
   # dummy method to make the interfaces of node, way and relation
   # more consistent.