X-Git-Url: https://git.openstreetmap.org./rails.git/blobdiff_plain/dbe165bbb3d6eda37d9579f1ac767599f9055607..5f4dcd34ff5943ff4de39bc8322013376a6de8b9:/app/models/way.rb

diff --git a/app/models/way.rb b/app/models/way.rb
index f0b35a88a..ecbdd2f9c 100644
--- a/app/models/way.rb
+++ b/app/models/way.rb
@@ -40,7 +40,7 @@ class Way < ActiveRecord::Base
     doc.find("//osm/way").each do |pt|
       return Way.from_xml_node(pt, create)
     end
-    fail OSM::APIBadXMLError.new("node", xml, "XML doesn't contain an osm/way element.")
+    raise OSM::APIBadXMLError.new("node", xml, "XML doesn't contain an osm/way element.")
   rescue LibXML::XML::Error, ArgumentError => ex
     raise OSM::APIBadXMLError.new("way", xml, ex.message)
   end
@@ -48,17 +48,17 @@ class Way < ActiveRecord::Base
   def self.from_xml_node(pt, create = false)
     way = Way.new
 
-    fail OSM::APIBadXMLError.new("way", pt, "Version is required when updating") unless create || !pt["version"].nil?
+    raise OSM::APIBadXMLError.new("way", pt, "Version is required when updating") unless create || !pt["version"].nil?
     way.version = pt["version"]
-    fail OSM::APIBadXMLError.new("way", pt, "Changeset id is missing") if pt["changeset"].nil?
+    raise OSM::APIBadXMLError.new("way", pt, "Changeset id is missing") if pt["changeset"].nil?
     way.changeset_id = pt["changeset"]
 
     unless create
-      fail OSM::APIBadXMLError.new("way", pt, "ID is required when updating") if pt["id"].nil?
+      raise OSM::APIBadXMLError.new("way", pt, "ID is required when updating") if pt["id"].nil?
       way.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
-      fail OSM::APIBadUserInput.new("ID of way cannot be zero when updating.") if way.id == 0
+      raise OSM::APIBadUserInput.new("ID of way cannot be zero when updating.") if way.id.zero?
     end
 
     # We don't care about the timestamp nor the visibility as these are either
@@ -71,8 +71,8 @@ class Way < ActiveRecord::Base
 
     # Add in any tags from the XML
     pt.find("tag").each do |tag|
-      fail OSM::APIBadXMLError.new("way", pt, "tag is missing key") if tag["k"].nil?
-      fail OSM::APIBadXMLError.new("way", pt, "tag is missing value") if tag["v"].nil?
+      raise OSM::APIBadXMLError.new("way", pt, "tag is missing key") if tag["k"].nil?
+      raise OSM::APIBadXMLError.new("way", pt, "tag is missing value") if tag["v"].nil?
       way.add_tag_keyval(tag["k"], tag["v"])
     end
 
@@ -83,16 +83,6 @@ class Way < ActiveRecord::Base
     way
   end
 
-  # Find a way given it's ID, and in a single SQL call also grab its nodes
-  #
-
-  # You can't pull in all the tags too unless we put a sequence_id on the way_tags table and have a multipart key
-  def self.find_eager(id)
-    Way.find(id, :include => { :way_nodes => :node })
-    # If waytag had a multipart key that was real, you could do this:
-    # Way.find(id, :include => [:way_tags, {:way_nodes => :node}])
-  end
-
   # Find a way given it's ID, and in a single SQL call also grab its nodes and tags
   def to_xml
     doc = OSM::API.new.get_xml_doc
@@ -157,7 +147,7 @@ class Way < ActiveRecord::Base
 
     # duplicate tags are now forbidden, so we can't allow values
     # in the hash to be overwritten.
-    fail OSM::APIDuplicateTagsError.new("way", id, k) if @tags.include? k
+    raise OSM::APIDuplicateTagsError.new("way", id, k) if @tags.include? k
 
     @tags[k] = v
   end
@@ -173,10 +163,10 @@ class Way < ActiveRecord::Base
 
   def update_from(new_way, user)
     Way.transaction do
-      self.lock!
+      lock!
       check_consistency(self, new_way, user)
       unless new_way.preconditions_ok?(nds)
-        fail OSM::APIPreconditionFailedError.new("Cannot update way #{id}: data is invalid.")
+        raise OSM::APIPreconditionFailedError.new("Cannot update way #{id}: data is invalid.")
       end
 
       self.changeset_id = new_way.changeset_id
@@ -190,8 +180,8 @@ class Way < ActiveRecord::Base
 
   def create_with_history(user)
     check_create_consistency(self, user)
-    unless self.preconditions_ok?
-      fail OSM::APIPreconditionFailedError.new("Cannot create way: data is invalid.")
+    unless preconditions_ok?
+      raise OSM::APIPreconditionFailedError.new("Cannot create way: data is invalid.")
     end
     self.version = 0
     self.visible = true
@@ -201,7 +191,7 @@ class Way < ActiveRecord::Base
   def preconditions_ok?(old_nodes = [])
     return false if nds.empty?
     if nds.length > MAX_NUMBER_OF_WAY_NODES
-      fail OSM::APITooManyWayNodesError.new(id, nds.length, MAX_NUMBER_OF_WAY_NODES)
+      raise OSM::APITooManyWayNodesError.new(id, nds.length, MAX_NUMBER_OF_WAY_NODES)
     end
 
     # check only the new nodes, for efficiency - old nodes having been checked last time and can't
@@ -209,11 +199,13 @@ class Way < ActiveRecord::Base
     new_nds = (nds - old_nodes).sort.uniq
 
     unless new_nds.empty?
-      db_nds = Node.where(:id => new_nds, :visible => true)
+      # NOTE: nodes are locked here to ensure they can't be deleted before
+      # the current transaction commits.
+      db_nds = Node.where(:id => new_nds, :visible => true).lock("for share")
 
       if db_nds.length < new_nds.length
         missing = new_nds - db_nds.collect(&:id)
-        fail OSM::APIPreconditionFailedError.new("Way #{id} requires the nodes with id in (#{missing.join(',')}), which either do not exist, or are not visible.")
+        raise OSM::APIPreconditionFailedError.new("Way #{id} requires the nodes with id in (#{missing.join(',')}), which either do not exist, or are not visible.")
       end
     end
 
@@ -221,16 +213,16 @@ class Way < ActiveRecord::Base
   end
 
   def delete_with_history!(new_way, user)
-    fail OSM::APIAlreadyDeletedError.new("way", new_way.id) unless visible
+    raise OSM::APIAlreadyDeletedError.new("way", new_way.id) unless visible
 
     # 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.
     Way.transaction do
-      self.lock!
+      lock!
       check_consistency(self, new_way, user)
       rels = Relation.joins(:relation_members).where(:visible => true, :current_relation_members => { :member_type => "Way", :member_id => id }).order(:id)
-      fail OSM::APIPreconditionFailedError.new("Way #{id} is still used by relations #{rels.collect(&:id).join(",")}.") unless rels.empty?
+      raise OSM::APIPreconditionFailedError.new("Way #{id} is still used by relations #{rels.collect(&:id).join(',')}.") unless rels.empty?
 
       self.changeset_id = new_way.changeset_id
       self.changeset = new_way.changeset
@@ -242,11 +234,6 @@ class Way < ActiveRecord::Base
     end
   end
 
-  # Temporary method to match interface to nodes
-  def tags_as_hash
-    tags
-  end
-
   ##
   # if any referenced nodes are placeholder IDs (i.e: are negative) then
   # this calling this method will fix them using the map from placeholders
@@ -255,7 +242,7 @@ class Way < ActiveRecord::Base
     nds.map! do |node_id|
       if node_id < 0
         new_id = id_map[:node][node_id]
-        fail OSM::APIBadUserInput.new("Placeholder node not found for reference #{node_id} in way #{id.nil? ? placeholder_id : id}") if new_id.nil?
+        raise OSM::APIBadUserInput.new("Placeholder node not found for reference #{node_id} in way #{id.nil? ? placeholder_id : id}") if new_id.nil?
         new_id
       else
         node_id
@@ -278,7 +265,7 @@ class Way < ActiveRecord::Base
     Way.transaction do
       self.version += 1
       self.timestamp = t
-      self.save!
+      save!
 
       tags = self.tags
       WayTag.delete_all(:way_id => id)