Merge pull request #1758 from ardean80/patch-1

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

diff --git a/app/models/changeset.rb b/app/models/changeset.rb
index bf939e425e5c5f0b08577c95678c37c2d89a39f8..502637c2a69b8926fc84a4dac6b2403f152574d4 100644 (file)
--- a/app/models/changeset.rb
+++ b/app/models/changeset.rb
@@ -1,3 +1,30 @@
+# == Schema Information
+#
+# Table name: changesets
+#
+#  id          :integer          not null, primary key
+#  user_id     :integer          not null
+#  created_at  :datetime         not null
+#  min_lat     :integer
+#  max_lat     :integer
+#  min_lon     :integer
+#  max_lon     :integer
+#  closed_at   :datetime         not null
+#  num_changes :integer          default(0), not null
+#
+# Indexes
+#
+#  changesets_bbox_idx                (min_lat,max_lat,min_lon,max_lon)
+#  changesets_closed_at_idx           (closed_at)
+#  changesets_created_at_idx          (created_at)
+#  changesets_user_id_created_at_idx  (user_id,created_at)
+#  changesets_user_id_id_idx          (user_id,id)
+#
+# Foreign Keys
+#
+#  changesets_user_id_fkey  (user_id => users.id)
+#
+
 class Changeset < ActiveRecord::Base
   require "xml/libxml"
 
@@ -28,11 +55,8 @@ class Changeset < ActiveRecord::Base
 
   before_save :update_closed_at
 
-  # over-expansion factor to use when updating the bounding box
-  EXPAND = 0.1
-
   # maximum number of elements allowed in a changeset
-  MAX_ELEMENTS = 50000
+  MAX_ELEMENTS = 10000
 
   # maximum time a changeset is allowed to be open for.
   MAX_TIME_OPEN = 1.day
@@ -63,7 +87,7 @@ class Changeset < ActiveRecord::Base
     doc.find("//osm/changeset").each do |pt|
       return Changeset.from_xml_node(pt, create)
     end
-    fail OSM::APIBadXMLError.new("changeset", xml, "XML doesn't contain an osm/changeset element.")
+    raise OSM::APIBadXMLError.new("changeset", xml, "XML doesn't contain an osm/changeset element.")
   rescue LibXML::XML::Error, ArgumentError => ex
     raise OSM::APIBadXMLError.new("changeset", xml, ex.message)
   end
@@ -80,8 +104,8 @@ class Changeset < ActiveRecord::Base
     end
 
     pt.find("tag").each do |tag|
-      fail OSM::APIBadXMLError.new("changeset", pt, "tag is missing key") if tag["k"].nil?
-      fail OSM::APIBadXMLError.new("changeset", pt, "tag is missing value") if tag["v"].nil?
+      raise OSM::APIBadXMLError.new("changeset", pt, "tag is missing key") if tag["k"].nil?
+      raise OSM::APIBadXMLError.new("changeset", pt, "tag is missing value") if tag["v"].nil?
       cs.add_tag_keyval(tag["k"], tag["v"])
     end
 
@@ -100,12 +124,9 @@ class Changeset < ActiveRecord::Base
   end
 
   ##
-  # expand the bounding box to include the given bounding box. also,
-  # expand a little bit more in the direction of the expansion, so that
-  # further expansions may be unnecessary. this is an optimisation
-  # suggested on the wiki page by kleptog.
+  # expand the bounding box to include the given bounding box.
   def update_bbox!(bbox_update)
-    bbox.expand!(bbox_update, EXPAND)
+    bbox.expand!(bbox_update)
 
     # update active record. rails 2.1's dirty handling should take care of
     # whether this object needs saving or not.
@@ -114,8 +135,7 @@ class Changeset < ActiveRecord::Base
 
   ##
   # the number of elements is also passed in so that we can ensure that
-  # a single changeset doesn't contain too many elements. this, of course,
-  # destroys the optimisation described in the bbox method above.
+  # a single changeset doesn't contain too many elements.
   def add_changes!(elements)
     self.num_changes += elements
   end
@@ -133,11 +153,11 @@ class Changeset < ActiveRecord::Base
   attr_writer :tags
 
   def add_tag_keyval(k, v)
-    @tags = {} unless @tags
+    @tags ||= {}
 
     # duplicate tags are now forbidden, so we can't allow values
     # in the hash to be overwritten.
-    fail OSM::APIDuplicateTagsError.new("changeset", id, k) if @tags.include? k
+    raise OSM::APIDuplicateTagsError.new("changeset", id, k) if @tags.include? k
 
     @tags[k] = v
   end
@@ -146,10 +166,10 @@ class Changeset < ActiveRecord::Base
     # do the changeset update and the changeset tags update in the
     # same transaction to ensure consistency.
     Changeset.transaction do
-      self.save!
+      save!
 
       tags = self.tags
-      ChangesetTag.delete_all(:changeset_id => id)
+      ChangesetTag.where(:changeset_id => id).delete_all
 
       tags.each do |k, v|
         tag = ChangesetTag.new
@@ -166,12 +186,12 @@ class Changeset < ActiveRecord::Base
   # that would make it more than 24h long, in which case clip to
   # 24h, as this has been decided is a reasonable time limit.
   def update_closed_at
-    if self.is_open?
-      if (closed_at - created_at) > (MAX_TIME_OPEN - IDLE_TIMEOUT)
-        self.closed_at = created_at + MAX_TIME_OPEN
-      else
-        self.closed_at = Time.now.getutc + IDLE_TIMEOUT
-      end
+    if is_open?
+      self.closed_at = if (closed_at - created_at) > (MAX_TIME_OPEN - IDLE_TIMEOUT)
+                         created_at + MAX_TIME_OPEN
+                       else
+                         Time.now.getutc + IDLE_TIMEOUT
+                       end
     end
   end
 
@@ -211,7 +231,7 @@ class Changeset < ActiveRecord::Base
 
     bbox.to_unscaled.add_bounds_to(el1, "_") if bbox.complete?
 
-    el1["comments_count"] = comments.count.to_s
+    el1["comments_count"] = comments.length.to_s
 
     if include_discussion
       el2 = XML::Node.new("discussion")
@@ -241,10 +261,10 @@ class Changeset < ActiveRecord::Base
   # bounding box, only the tags of the changeset.
   def update_from(other, user)
     # ensure that only the user who opened the changeset may modify it.
-    fail OSM::APIUserChangesetMismatchError.new unless user.id == user_id
+    raise OSM::APIUserChangesetMismatchError unless user.id == user_id
 
     # can't change a closed changeset
-    fail OSM::APIChangesetAlreadyClosedError.new(self) unless is_open?
+    raise OSM::APIChangesetAlreadyClosedError, self unless is_open?
 
     # copy the other's tags
     self.tags = other.tags