Simplify a number of object model methods

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

diff --git a/app/models/old_node.rb b/app/models/old_node.rb
index be115c53eaaaa026d38559ad63c5316326872968..90304acae4c1f9dadbaceaecc37475703648cbdd 100644 (file)
--- a/app/models/old_node.rb
+++ b/app/models/old_node.rb
@@ -1,9 +1,15 @@
 class OldNode < ActiveRecord::Base
   include GeoRecord
   include ConsistencyValidations
+  include ObjectMetadata
+
+  self.table_name = "nodes"
+  self.primary_keys = "node_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
 
-  set_table_name 'nodes'
-  
   validates_presence_of :changeset_id, :timestamp
   validates_inclusion_of :visible, :in => [ true, false ]
   validates_numericality_of :latitude, :longitude
@@ -11,9 +17,13 @@ class OldNode < ActiveRecord::Base
   validates_associated :changeset
 
   belongs_to :changeset
- 
+  belongs_to :redaction
+  belongs_to :current_node, :class_name => "Node", :foreign_key => "node_id"
+
+  has_many :old_tags, :class_name => 'OldNodeTag', :foreign_key => [:node_id, :version]
+
   def validate_position
-    errors.add_to_base("Node is not in the world") unless in_world?
+    errors.add(:base, "Node is not in the world") unless in_world?
   end
 
   def self.from_node(node)
@@ -24,7 +34,7 @@ class OldNode < ActiveRecord::Base
     old_node.tags = node.tags
     old_node.timestamp = node.timestamp
     old_node.changeset_id = node.changeset_id
-    old_node.id = node.id
+    old_node.node_id = node.id
     old_node.version = node.version
     return old_node
   end
@@ -35,28 +45,20 @@ class OldNode < ActiveRecord::Base
     return doc
   end
 
-  def to_xml_node
-    el1 = XML::Node.new 'node'
-    el1['id'] = self.id.to_s
-    el1['lat'] = self.lat.to_s
-    el1['lon'] = self.lon.to_s
-    el1['changeset'] = self.changeset.id.to_s
-    if self.changeset.user.data_public?
-      el1['user'] = self.changeset.user.display_name
-      el1['uid'] = self.changeset.user.id.to_s
-    end
+  def to_xml_node(changeset_cache = {}, user_display_name_cache = {})
+    el = XML::Node.new 'node'
+    el['id'] = self.node_id.to_s
 
-    self.tags.each do |k,v|
-      el2 = XML::Node.new('tag')
-      el2['k'] = k.to_s
-      el2['v'] = v.to_s
-      el1 << el2
+    add_metadata_to_xml_node(el, self, changeset_cache, user_display_name_cache)
+
+    if self.visible?
+      el['lat'] = self.lat.to_s
+      el['lon'] = self.lon.to_s
     end
 
-    el1['visible'] = self.visible.to_s
-    el1['timestamp'] = self.timestamp.xmlschema
-    el1['version'] = self.version.to_s
-    return el1
+    add_tags_to_xml_node(el, self.old_tags)
+
+    return el
   end
 
   def save_with_dependencies!
@@ -65,27 +67,20 @@ class OldNode < ActiveRecord::Base
     clear_aggregation_cache
     clear_association_cache
     #ok from here
-    @attributes.update(OldNode.find(:first, :conditions => ['id = ? AND timestamp = ? AND version = ?', self.id, self.timestamp, self.version]).instance_variable_get('@attributes'))
+    @attributes.update(OldNode.where(:node_id => self.node_id, :timestamp => self.timestamp, :version => self.version).first.instance_variable_get('@attributes'))
    
     self.tags.each do |k,v|
       tag = OldNodeTag.new
       tag.k = k
       tag.v = v
-      tag.id = self.id
+      tag.node_id = self.node_id
       tag.version = self.version
       tag.save!
     end
   end
 
   def tags
-    unless @tags
-        @tags = Hash.new
-        OldNodeTag.find(:all, :conditions => ["id = ? AND version = ?", self.id, self.version]).each do |tag|
-            @tags[tag.k] = tag.v
-        end
-    end
-    @tags = Hash.new unless @tags
-    @tags
+    @tags ||= Hash[self.old_tags.collect { |t| [t.k, t.v] }]
   end
 
   def tags=(t)
@@ -105,4 +100,10 @@ class OldNode < ActiveRecord::Base
   def containing_relation_members 
     return [] 
   end 
+
+  # check whether this element is the latest version - that is,
+  # has the same version as its "current" counterpart.
+  def is_latest_version?
+    current_node.version == self.version
+  end
 end