X-Git-Url: https://git.openstreetmap.org/rails.git/blobdiff_plain/3d0ca940d26bdc23aa791178b01b816185c5a086..9c0d5277adfde9f7daee0b0c83d4e68dd331e905:/app/models/way.rb

diff --git a/app/models/way.rb b/app/models/way.rb
index 935a7422c..85aca4334 100644
--- a/app/models/way.rb
+++ b/app/models/way.rb
@@ -7,12 +7,12 @@ class Way < ActiveRecord::Base
   
   belongs_to :changeset
 
-  has_many :old_ways, :foreign_key => 'id', :order => 'version'
+  has_many :old_ways, :order => 'version'
 
-  has_many :way_nodes, :foreign_key => 'id', :order => 'sequence_id'
+  has_many :way_nodes, :order => 'sequence_id'
   has_many :nodes, :through => :way_nodes, :order => 'sequence_id'
 
-  has_many :way_tags, :foreign_key => 'id'
+  has_many :way_tags
 
   has_many :containing_relation_members, :class_name => "RelationMember", :as => :member
   has_many :containing_relations, :class_name => "Relation", :through => :containing_relation_members, :source => :relation, :extend => ObjectFinder
@@ -25,6 +25,10 @@ class Way < ActiveRecord::Base
   validates_numericality_of :id, :on => :update, :integer_only => true
   validates_associated :changeset
 
+  scope :visible, where(:visible => true)
+  scope :invisible, where(:visible => false)
+
+  # Read in xml as text and return it's Way object representation
   def self.from_xml(xml, create=false)
     begin
       p = XML::Parser.string(xml)
@@ -33,6 +37,7 @@ class Way < ActiveRecord::Base
       doc.find('//osm/way').each do |pt|
         return Way.from_xml_node(pt, create)
       end
+      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
@@ -41,27 +46,27 @@ class Way < ActiveRecord::Base
   def self.from_xml_node(pt, create=false)
     way = Way.new
 
-    if !create and pt['id'] != '0'
-      way.id = pt['id'].to_i
-    end
-    
+    raise OSM::APIBadXMLError.new("way", pt, "Version is required when updating") unless create or not pt['version'].nil?
     way.version = pt['version']
-    raise OSM::APIBadXMLError.new("node", pt, "Changeset is required") if pt['changeset'].nil?
+    raise OSM::APIBadXMLError.new("way", pt, "Changeset id is missing") if pt['changeset'].nil?
     way.changeset_id = pt['changeset']
 
-    # This next section isn't required for the create, update, or delete of ways
-    if create
-      way.timestamp = Time.now.getutc
-      way.visible = true
-    else
-      if pt['timestamp']
-        way.timestamp = Time.parse(pt['timestamp'])
-      end
-      # if visible isn't present then it defaults to true
-      way.visible = (pt['visible'] or true)
+    unless create
+      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
+      raise OSM::APIBadUserInput.new("ID of way cannot be zero when updating.") if way.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.
+    way.visible = true
+
     pt.find('tag').each do |tag|
+      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
 
@@ -200,21 +205,24 @@ class Way < ActiveRecord::Base
   def bbox
     lons = nodes.collect { |n| n.longitude }
     lats = nodes.collect { |n| n.latitude }
-    [ lons.min, lats.min, lons.max, lats.max ]
+    BoundingBox.new(lons.min, lats.min, lons.max, lats.max)
   end
 
   def update_from(new_way, user)
-    check_consistency(self, new_way, user)
-    unless new_way.preconditions_ok?(self.nds)
-      raise OSM::APIPreconditionFailedError.new("Cannot update way #{self.id}: data is invalid.")
+    Way.transaction do
+      self.lock!
+      check_consistency(self, new_way, user)
+      unless new_way.preconditions_ok?(self.nds)
+        raise OSM::APIPreconditionFailedError.new("Cannot update way #{self.id}: data is invalid.")
+      end
+      
+      self.changeset_id = new_way.changeset_id
+      self.changeset = new_way.changeset
+      self.tags = new_way.tags
+      self.nds = new_way.nds
+      self.visible = true
+      save_with_history!
     end
-
-    self.changeset_id = new_way.changeset_id
-    self.changeset = new_way.changeset
-    self.tags = new_way.tags
-    self.nds = new_way.nds
-    self.visible = true
-    save_with_history!
   end
 
   def create_with_history(user)
@@ -229,8 +237,8 @@ class Way < ActiveRecord::Base
 
   def preconditions_ok?(old_nodes = [])
     return false if self.nds.empty?
-    if self.nds.length > APP_CONFIG['max_number_of_way_nodes']
-      raise OSM::APITooManyWayNodesError.new(self.nds.length, APP_CONFIG['max_number_of_way_nodes'])
+    if self.nds.length > MAX_NUMBER_OF_WAY_NODES
+      raise OSM::APITooManyWayNodesError.new(self.id, self.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
@@ -238,7 +246,7 @@ class Way < ActiveRecord::Base
     new_nds = (self.nds - old_nodes).sort.uniq
 
     unless new_nds.empty?
-      db_nds = Node.find(:all, :conditions => { :id => new_nds, :visible => true })
+      db_nds = Node.where(:id => new_nds, :visible => true)
 
       if db_nds.length < new_nds.length
         missing = new_nds - db_nds.collect { |n| n.id }
@@ -258,11 +266,11 @@ class Way < ActiveRecord::Base
     # provide repeatable reads for the used-by checks. this means it
     # shouldn't be possible to get race conditions.
     Way.transaction do
+      self.lock!
       check_consistency(self, new_way, user)
-      rel = RelationMember.find(:first, :joins => :relation,
-                             :conditions => [ "visible = ? AND member_type='Way' and member_id=? ", true, self.id])
-      raise OSM::APIPreconditionFailedError.new("Way #{self.id} still used by relation #{rel.relation.id}.") if rel
-      
+      rels = Relation.joins(:relation_members).where(:visible => true, :current_relation_members => { :member_type => "Way", :member_id => id }).order(:id)
+      raise OSM::APIPreconditionFailedError.new("Way #{self.id} is still used by relations #{rels.collect { |r| r.id }.join(",")}.") unless rels.empty?
+
       self.changeset_id = new_way.changeset_id
       self.changeset = new_way.changeset
 
@@ -312,17 +320,17 @@ class Way < ActiveRecord::Base
       self.save!
 
       tags = self.tags
-      WayTag.delete_all(['id = ?', self.id])
+      WayTag.delete_all(:way_id => self.id)
       tags.each do |k,v|
         tag = WayTag.new
+        tag.way_id = self.id
         tag.k = k
         tag.v = v
-        tag.id = self.id
         tag.save!
       end
 
       nds = self.nds
-      WayNode.delete_all(['id = ?', self.id])
+      WayNode.delete_all(:way_id => self.id)
       sequence = 1
       nds.each do |n|
         nd = WayNode.new
@@ -350,5 +358,4 @@ class Way < ActiveRecord::Base
       cs.save!
     end
   end
-
 end