class Way < ActiveRecord::Base
require 'xml/libxml'
-
+
include ConsistencyValidations
include NotRedactable
include ObjectMetadata
self.table_name = "current_ways"
-
+
belongs_to :changeset
has_many :old_ways, -> { order(:version) }
has_many :way_nodes, -> { order(:sequence_id) }
- has_many :nodes, -> { order("sequence_id") }, :through => :way_nodes
+ has_many :nodes, :through => :way_nodes
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
+ has_many :containing_relations, :class_name => "Relation", :through => :containing_relation_members, :source => :relation
validates_presence_of :id, :on => :update
- validates_presence_of :changeset_id,:version, :timestamp
+ validates_presence_of :changeset_id, :version, :timestamp
validates_uniqueness_of :id
- validates_inclusion_of :visible, :in => [ true, false ]
+ 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
scope :visible, -> { where(:visible => true) }
- scope :invisible, -> { where(:visible => false) }
+ 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)
- doc = p.parse
+ def self.from_xml(xml, create = false)
+ p = XML::Parser.string(xml)
+ doc = p.parse
- 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)
+ 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.")
+ rescue LibXML::XML::Error, ArgumentError => ex
+ raise OSM::APIBadXMLError.new("way", xml, ex.message)
end
- def self.from_xml_node(pt, create=false)
+ def self.from_xml_node(pt, create = false)
way = Way.new
- raise OSM::APIBadXMLError.new("way", pt, "Version is required when updating") unless create or not pt['version'].nil?
+ fail OSM::APIBadXMLError.new("way", pt, "Version is required when updating") unless create || !pt['version'].nil?
way.version = pt['version']
- raise OSM::APIBadXMLError.new("way", pt, "Changeset id is missing") if pt['changeset'].nil?
+ fail OSM::APIBadXMLError.new("way", pt, "Changeset id is missing") if pt['changeset'].nil?
way.changeset_id = pt['changeset']
unless create
- raise OSM::APIBadXMLError.new("way", pt, "ID is required when updating") if pt['id'].nil?
+ fail 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.
+ # .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
+ fail 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,
+ # 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
# Start with no tags
- way.tags = Hash.new
+ way.tags = {}
# Add in any tags from the XML
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?
+ 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?
way.add_tag_keyval(tag['k'], tag['v'])
end
way.add_nd_num(nd['ref'])
end
- return way
+ 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 = Way.find(id, :include => {:way_nodes => :node})
- #If waytag had a multipart key that was real, you could do this:
- #way = Way.find(id, :include => [:way_tags, {:way_nodes => :node}])
+ 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
- doc.root << to_xml_node()
- return doc
+ doc.root << to_xml_node
+ doc
end
def to_xml_node(visible_nodes = nil, changeset_cache = {}, user_display_name_cache = {})
- el1 = XML::Node.new 'way'
- el1['id'] = self.id.to_s
- add_metadata_to_xml_node(el1, self, changeset_cache, user_display_name_cache)
+ el = XML::Node.new 'way'
+ el['id'] = id.to_s
+
+ add_metadata_to_xml_node(el, self, changeset_cache, user_display_name_cache)
# make sure nodes are output in sequence_id order
ordered_nodes = []
- self.way_nodes.each do |nd|
+ way_nodes.each do |nd|
if visible_nodes
# if there is a list of visible nodes then use that to weed out deleted nodes
if visible_nodes[nd.node_id]
end
else
# otherwise, manually go to the db to check things
- if nd.node and nd.node.visible?
+ if nd.node && nd.node.visible?
ordered_nodes[nd.sequence_id] = nd.node_id.to_s
end
end
end
ordered_nodes.each do |nd_id|
- if nd_id and nd_id != '0'
- e = XML::Node.new 'nd'
- e['ref'] = nd_id
- el1 << e
- end
- end
+ next unless nd_id && nd_id != '0'
- self.way_tags.each do |tag|
- e = XML::Node.new 'tag'
- e['k'] = tag.k
- e['v'] = tag.v
- el1 << e
+ node_el = XML::Node.new 'nd'
+ node_el['ref'] = nd_id
+ el << node_el
end
- return el1
- end
+
+ add_tags_to_xml_node(el, way_tags)
+
+ el
+ end
def nds
- unless @nds
- @nds = Array.new
- self.way_nodes.each do |nd|
- @nds += [nd.node_id]
- end
- end
- @nds
+ @nds ||= way_nodes.collect(&:node_id)
end
def tags
- unless @tags
- @tags = {}
- self.way_tags.each do |tag|
- @tags[tag.k] = tag.v
- end
- end
- @tags
+ @tags ||= Hash[way_tags.collect { |t| [t.k, t.v] }]
end
- def nds=(s)
- @nds = s
- end
+ attr_writer :nds
- def tags=(t)
- @tags = t
- end
+ attr_writer :tags
def add_nd_num(n)
- @nds = Array.new unless @nds
+ @nds = [] unless @nds
@nds << n.to_i
end
def add_tag_keyval(k, v)
- @tags = Hash.new unless @tags
+ @tags = {} unless @tags
# duplicate tags are now forbidden, so we can't allow values
# in the hash to be overwritten.
- raise OSM::APIDuplicateTagsError.new("way", self.id, k) if @tags.include? k
+ fail OSM::APIDuplicateTagsError.new("way", id, k) 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 = nodes.collect(&:longitude)
+ lats = nodes.collect(&:latitude)
BoundingBox.new(lons.min, lats.min, lons.max, lats.max)
end
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.")
+ unless new_way.preconditions_ok?(nds)
+ fail OSM::APIPreconditionFailedError.new("Cannot update way #{id}: data is invalid.")
end
-
+
self.changeset_id = new_way.changeset_id
self.changeset = new_way.changeset
self.tags = new_way.tags
def create_with_history(user)
check_create_consistency(self, user)
unless self.preconditions_ok?
- raise OSM::APIPreconditionFailedError.new("Cannot create way: data is invalid.")
+ fail OSM::APIPreconditionFailedError.new("Cannot create way: data is invalid.")
end
self.version = 0
self.visible = true
end
def preconditions_ok?(old_nodes = [])
- return false if self.nds.empty?
- if self.nds.length > MAX_NUMBER_OF_WAY_NODES
- raise OSM::APITooManyWayNodesError.new(self.id, self.nds.length, MAX_NUMBER_OF_WAY_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)
end
# check only the new nodes, for efficiency - old nodes having been checked last time and can't
# be deleted when they're in-use.
- new_nds = (self.nds - old_nodes).sort.uniq
+ new_nds = (nds - old_nodes).sort.uniq
unless new_nds.empty?
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 }
- raise OSM::APIPreconditionFailedError.new("Way #{self.id} requires the nodes with id in (#{missing.join(',')}), which either do not exist, or are not visible.")
+ 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.")
end
end
- return true
+ true
end
def delete_with_history!(new_way, user)
- unless self.visible
- raise OSM::APIAlreadyDeletedError.new("way", new_way.id)
- end
-
- # need to start the transaction here, so that the database can
+ fail 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!
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)
- raise OSM::APIPreconditionFailedError.new("Way #{self.id} is still used by relations #{rels.collect { |r| r.id }.join(",")}.") unless rels.empty?
+ fail 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
# Temporary method to match interface to nodes
def tags_as_hash
- return self.tags
+ 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+.
+ # this calling this method will fix them using the map from placeholders
+ # to IDs +id_map+.
def fix_placeholders!(id_map, placeholder_id = nil)
- self.nds.map! do |node_id|
+ nds.map! do |node_id|
if node_id < 0
new_id = id_map[:node][node_id]
- raise OSM::APIBadUserInput.new("Placeholder node not found for reference #{node_id} in way #{self.id.nil? ? placeholder_id : self.id}") if new_id.nil?
+ fail 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
end
private
-
+
def save_with_history!
t = Time.now.getutc
- # update the bounding box, note that this has to be done both before
- # and after the save, so that nodes from both versions are included in the
+ # update the bounding box, note that this has to be done both before
+ # and after the save, so that nodes from both versions are included in the
# bbox. we use a copy of the changeset so that it isn't reloaded
# later in the save.
- cs = self.changeset
+ cs = changeset
cs.update_bbox!(bbox) unless nodes.empty?
Way.transaction do
self.save!
tags = self.tags
- WayTag.delete_all(:way_id => self.id)
- tags.each do |k,v|
+ WayTag.delete_all(:way_id => id)
+ tags.each do |k, v|
tag = WayTag.new
- tag.way_id = self.id
+ tag.way_id = id
tag.k = k
tag.v = v
tag.save!
end
nds = self.nds
- WayNode.delete_all(:way_id => self.id)
+ WayNode.delete_all(:way_id => id)
sequence = 1
nds.each do |n|
nd = WayNode.new
- nd.id = [self.id, sequence]
+ nd.id = [id, sequence]
nd.node_id = n
nd.save!
sequence += 1
# reload the way so that the nodes array points to the correct
# new set of nodes.
- self.reload
+ reload
- # update and commit the bounding box, now that way nodes
+ # update and commit the bounding box, now that way nodes
# have been updated and we're in a transaction.
cs.update_bbox!(bbox) unless nodes.empty?
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