Update ActiveRecord queries to use arel

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

diff --git a/app/models/relation.rb b/app/models/relation.rb
index fda5e5677fe57a4fb5c49218d1248b76b4f93920..dd4d4925887b5fca34df4cc68a54ca45fef09988 100644 (file)
--- a/app/models/relation.rb
+++ b/app/models/relation.rb
@@ -23,6 +23,12 @@ class Relation < ActiveRecord::Base
   validates_numericality_of :changeset_id, :version, :integer_only => true
   validates_associated :changeset
   
+  scope :visible, where(:visible => true)
+  scope :invisible, where(:visible => false)
+  scope :nodes, lambda { |*ids| joins(:relation_members).where(:current_relation_members => { :member_type => "Node", :member_id => ids }) }
+  scope :ways, lambda { |*ids| joins(:relation_members).where(:current_relation_members => { :member_type => "Way", :member_id => ids }) }
+  scope :relations, lambda { |*ids| joins(:relation_members).where(:current_relation_members => { :member_type => "Relation", :member_id => ids }) }
+
   TYPES = ["node", "way", "relation"]
 
   def self.from_xml(xml, create=false)
@@ -33,6 +39,7 @@ class Relation < ActiveRecord::Base
       doc.find('//osm/relation').each do |pt|
         return Relation.from_xml_node(pt, create)
       end
+      raise OSM::APIBadXMLError.new("node", xml, "XML doesn't contain an osm/relation element.")
     rescue LibXML::XML::Error, ArgumentError => ex
       raise OSM::APIBadXMLError.new("relation", xml, ex.message)
     end
@@ -41,27 +48,27 @@ class Relation < ActiveRecord::Base
   def self.from_xml_node(pt, create=false)
     relation = Relation.new
 
-    if !create and pt['id'] != '0'
-      relation.id = pt['id'].to_i
-    end
-
-    raise OSM::APIBadXMLError.new("relation", pt, "You are missing the required changeset in the relation") if pt['changeset'].nil?
+    raise OSM::APIBadXMLError.new("relation", pt, "Version is required when updating") unless create or not pt['version'].nil?
+    relation.version = pt['version']
+    raise OSM::APIBadXMLError.new("relation", pt, "Changeset id is missing") if pt['changeset'].nil?
     relation.changeset_id = pt['changeset']
-
-    # The follow block does not need to be executed because they are dealt with 
-    # in create_with_history, update_from and delete_with_history
-    if create
-      relation.timestamp = Time.now.getutc
-      relation.visible = true
-      relation.version = 0
-    else
-      if pt['timestamp']
-        relation.timestamp = Time.parse(pt['timestamp'])
-      end
-      relation.version = pt['version']
+    
+    unless create
+      raise OSM::APIBadXMLError.new("relation", pt, "ID is required when updating") if pt['id'].nil?
+      relation.id = pt['id'].to_i
+      # .to_i will return 0 if there is no number that can be parsed. 
+      # We want to make sure that there is no id with zero anyway
+      raise OSM::APIBadUserInput.new("ID of relation cannot be zero when updating.") if relation.id == 0
     end
+    
+    # We don't care about the timestamp nor the visibility as these are either
+    # set explicitly or implicit in the action. The visibility is set to true, 
+    # and manually set to false before the actual delete.
+    relation.visible = true
 
     pt.find('tag').each do |tag|
+      raise OSM::APIBadXMLError.new("relation", pt, "tag is missing key") if tag['k'].nil?
+      raise OSM::APIBadXMLError.new("relation", pt, "tag is missing value") if tag['v'].nil?
       relation.add_tag_keyval(tag['k'], tag['v'])
     end
 
@@ -147,36 +154,6 @@ class Relation < ActiveRecord::Base
     return el1
   end 
 
-  def self.find_for_nodes(ids, options = {})
-    if ids.empty?
-      return []
-    else
-      self.with_scope(:find => { :joins => "INNER JOIN current_relation_members AS crm ON crm.id = current_relations.id", :conditions => "crm.member_type = 'Node' AND crm.member_id IN (#{ids.join(',')})" }) do
-        return self.find(:all, options)
-      end
-    end
-  end
-
-  def self.find_for_ways(ids, options = {})
-    if ids.empty?
-      return []
-    else
-      self.with_scope(:find => { :joins => "INNER JOIN current_relation_members AS crm ON crm.id = current_relations.id", :conditions => "crm.member_type = 'Way' AND crm.member_id IN (#{ids.join(',')})" }) do
-        return self.find(:all, options)
-      end
-    end
-  end
-
-  def self.find_for_relations(ids, options = {})
-    if ids.empty?
-      return []
-    else
-      self.with_scope(:find => { :joins => "INNER JOIN current_relation_members AS crm ON crm.id = current_relations.id", :conditions => "crm.member_type = 'Relation' AND crm.member_id IN (#{ids.join(',')})" }) do
-        return self.find(:all, options)
-      end
-    end
-  end
-
   # FIXME is this really needed?
   def members
     unless @members