X-Git-Url: https://git.openstreetmap.org/rails.git/blobdiff_plain/bb3108cb99e95775492157fe135eeda5e70a664e..c273b4b1faa6dd3d8aba3d5556605f683326948a:/app/models/relation.rb

diff --git a/app/models/relation.rb b/app/models/relation.rb
index ae9d2f844..7be027559 100644
--- a/app/models/relation.rb
+++ b/app/models/relation.rb
@@ -242,7 +242,8 @@ class Relation < ActiveRecord::Base
     Relation.transaction do
       check_consistency(self, new_relation, user)
       # This will check to see if this relation is used by another relation
-      rel = RelationMember.find(:first, :joins => "INNER JOIN current_relations ON current_relations.id=current_relation_members.id", :conditions => [ "visible = ? AND member_type='Relation' and member_id=? ", true, self.id ])
+      rel = RelationMember.find(:first, :joins => :relation, 
+                                :conditions => [ "visible = ? AND member_type='Relation' and member_id=? ", true, self.id ])
       raise OSM::APIPreconditionFailedError.new("The relation #{new_relation.id} is used in relation #{rel.relation.id}.") unless rel.nil?
 
       self.changeset_id = new_relation.changeset_id
@@ -255,7 +256,7 @@ class Relation < ActiveRecord::Base
 
   def update_from(new_relation, user)
     check_consistency(self, new_relation, user)
-    unless new_relation.preconditions_ok?
+    unless new_relation.preconditions_ok?(self.members)
       raise OSM::APIPreconditionFailedError.new("Cannot update relation #{self.id}: data or member data is invalid.")
     end
     self.changeset_id = new_relation.changeset_id
@@ -276,7 +277,7 @@ class Relation < ActiveRecord::Base
     save_with_history!
   end
 
-  def preconditions_ok?
+  def preconditions_ok?(good_members = [])
     # These are hastables that store an id in the index of all 
     # the nodes/way/relations that have already been added.
     # If the member is valid and visible then we add it to the 
@@ -285,19 +286,23 @@ class Relation < ActiveRecord::Base
     # relation, then the hash table nodes would contain:
     # => {50=>true, 1=>true}
     elements = { :node => Hash.new, :way => Hash.new, :relation => Hash.new }
+
+    # pre-set all existing members to good
+    good_members.each { |m| elements[m[0].downcase.to_sym][m[1]] = true }
+
     self.members.each do |m|
       # find the hash for the element type or die
-      logger.debug m[0]
       hash = elements[m[0].downcase.to_sym] or return false
       # unless its in the cache already
       unless hash.key? m[1]
         # use reflection to look up the appropriate class
         model = Kernel.const_get(m[0].capitalize)
         # get the element with that ID
-        element = model.find(m[1])
+        element = model.find(:first, :conditions =>["id = ?", m[1]])
 
         # and check that it is OK to use.
         unless element and element.visible? and element.preconditions_ok?
+          raise OSM::APIPreconditionFailedError.new("Relation with id #{self.id} cannot be saved due to #{m[0]} with id #{element.id}")
           return false
         end
         hash[m[1]] = true