class Way < ActiveRecord::Base
require 'xml/libxml'
+
+ include ConsistencyValidations
set_table_name 'current_ways'
-
+
belongs_to :changeset
has_many :old_ways, :foreign_key => 'id', :order => 'version'
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
+ validates_presence_of :id, :on => :update
+ validates_presence_of :changeset_id,:version, :timestamp
+ validates_uniqueness_of :id
+ validates_inclusion_of :visible, :in => [ true, false ]
+ validates_numericality_of :changeset_id, :version, :integer_only => true
+ validates_numericality_of :id, :on => :update, :integer_only => true
+ validates_associated :changeset
+
def self.from_xml(xml, create=false)
begin
p = XML::Parser.new
doc = p.parse
doc.find('//osm/way').each do |pt|
- return Way.from_xml_node(pt, create)
+ return Way.from_xml_node(pt, create)
end
rescue
return nil
end
way.version = pt['version']
+ way.changeset_id = pt['changeset']
if create
way.timestamp = Time.now
way.visible = true
else
if pt['timestamp']
- way.timestamp = Time.parse(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)
end
pt.find('tag').each do |tag|
el1['visible'] = self.visible.to_s
el1['timestamp'] = self.timestamp.xmlschema
el1['version'] = self.version.to_s
+ el1['changeset'] = self.changeset_id.to_s
user_display_name_cache = {} if user_display_name_cache.nil?
- if user_display_name_cache and user_display_name_cache.key?(self.user_id)
+ if user_display_name_cache and user_display_name_cache.key?(self.changeset.user_id)
# use the cache if available
- elsif self.user.data_public?
- user_display_name_cache[self.user_id] = self.user.display_name
+ elsif self.changeset.user.data_public?
+ user_display_name_cache[self.changeset.user_id] = self.changeset.user.display_name
else
- user_display_name_cache[self.user_id] = nil
+ user_display_name_cache[self.changeset.user_id] = nil
end
- el1['user'] = user_display_name_cache[self.user_id] unless user_display_name_cache[self.user_id].nil?
+ if not user_display_name_cache[self.changeset.user_id].nil?
+ el1['user'] = user_display_name_cache[self.changeset.user_id]
+ el1['uid'] = self.changeset.user_id.to_s
+ end
# make sure nodes are output in sequence_id order
ordered_nodes = []
end
else
# otherwise, manually go to the db to check things
- if nd.node.visible? and nd.node.visible?
+ if nd.node and nd.node.visible?
ordered_nodes[nd.sequence_id] = nd.node_id.to_s
end
end
def add_tag_keyval(k, v)
@tags = Hash.new unless @tags
+
+ # duplicate tags are now forbidden, so we can't allow values
+ # in the hash to be overwritten.
+ raise OSM::APIDuplicateTagsError.new if @tags.include? k
+
@tags[k] = v
end
+ ##
+ # the integer coords (i.e: unscaled) bounding box of the way, assuming
+ # straight line segments.
+ def bbox
+ lons = nodes.collect { |n| n.longitude }
+ lats = nodes.collect { |n| n.latitude }
+ [ lons.min, lats.min, lons.max, lats.max ]
+ end
+
def save_with_history!
t = Time.now
+ # update the bounding box, but don't save it as the controller knows the
+ # lifetime of the change better. note that this has to be done both before
+ # and after the save, so that nodes from both versions are included in the
+ # bbox.
+ changeset.update_bbox!(bbox) unless nodes.empty?
+
Way.transaction do
self.version += 1
self.timestamp = t
old_way = OldWay.from_way(self)
old_way.timestamp = t
old_way.save_with_dependencies!
+
+ # update and commit the bounding box, now that way nodes
+ # have been updated and we're in a transaction.
+ changeset.update_bbox!(bbox) unless nodes.empty?
+
+ # tell the changeset we updated one element only
+ changeset.add_changes! 1
+
+ changeset.save!
end
end
def update_from(new_way, user)
+ check_consistency(self, new_way, user)
if !new_way.preconditions_ok?
raise OSM::APIPreconditionFailedError.new
- elsif new_way.version != version
- raise OSM::APIVersionMismatchError.new(new_way.version, version)
- else
- self.user_id = user.id
- 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.tags = new_way.tags
+ self.nds = new_way.nds
+ self.visible = true
+ save_with_history!
+ end
+
+ def create_with_history(user)
+ check_create_consistency(self, user)
+ if !self.preconditions_ok?
+ raise OSM::APIPreconditionFailedError.new
+ end
+ self.version = 0
+ self.visible = true
+ save_with_history!
end
def preconditions_ok?
return false if self.nds.empty?
+ if self.nds.length > APP_CONFIG['max_number_of_way_nodes']
+ raise OSM::APITooManyWayNodesError.new(self.nds.count, APP_CONFIG['max_number_of_way_nodes'])
+ end
self.nds.each do |n|
node = Node.find(:first, :conditions => ["id = ?", n])
unless node and node.visible
return true
end
- def delete_with_history(user)
- if self.visible
- # FIXME
- # this should actually delete the relations,
- # not just throw a PreconditionFailed if it's a member of a relation!!
-
- # FIXME: this should probably renamed to delete_with_history
+ def delete_with_history!(new_way, user)
+ unless self.visible
+ raise OSM::APIAlreadyDeletedError
+ end
+
+ # 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
+ check_consistency(self, new_way, user)
if RelationMember.find(:first, :joins => "INNER JOIN current_relations ON current_relations.id=current_relation_members.id",
- :conditions => [ "visible = 1 AND member_type='way' and member_id=?", self.id])
+ :conditions => [ "visible = ? AND member_type='way' and member_id=? ", true, self.id])
raise OSM::APIPreconditionFailedError
- # end FIXME
else
- self.user_id = user.id
+ self.changeset_id = new_way.changeset_id
self.tags = []
self.nds = []
self.visible = false
self.save_with_history!
end
- else
- raise OSM::APIAlreadyDeletedError
end
end
- # delete a way and it's nodes that aren't part of other ways, with history
+ # delete a way and its nodes that aren't part of other ways, with history
# FIXME: merge the potlatch code to delete the relations
- def delete_with_relations_and_nodes_and_history(user)
+ # and refactor to use delete_with_history!
+ def delete_with_relations_and_nodes_and_history(changeset_id)
# delete the nodes not used by other ways
self.unshared_node_ids.each do |node_id|
n = Node.find(node_id)
- n.user_id = user.id
+ n.changeset_id = changeset_id
n.visible = false
n.save_with_history!
end
- self.user_id = user.id
-
- self.delete_with_history(user)
+ self.changeset_id = changeset_id
+ self.tags = []
+ self.nds = []
+ self.visible = false
+ self.save_with_history!
end
# Find nodes that belong to this way only
def tags_as_hash
return self.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
+ # to IDs +id_map+.
+ def fix_placeholders!(id_map)
+ self.nds.map! do |node_id|
+ if node_id < 0
+ new_id = id_map[:node][node_id]
+ raise "invalid placeholder for #{node_id.inspect}: #{new_id.inspect}" if new_id.nil?
+ new_id
+ else
+ node_id
+ end
+ end
+ end
+
end
projects / rails.git / blobdiff