4 set_table_name 'current_nodes'
6 validates_presence_of :user_id, :timestamp
7 validates_inclusion_of :visible, :in => [ true, false ]
8 validates_numericality_of :latitude, :longitude
9 validate :validate_position
11 has_many :old_nodes, :foreign_key => :id
13 has_many :node_tags, :foreign_key => :id
17 errors.add_to_base("Node is not in the world") unless in_world?
21 return false if self.lat < -90 or self.lat > 90
22 return false if self.lon < -180 or self.lon > 180
27 # Search for nodes matching tags within bounding_box
29 # Also adheres to limitations such as within max_number_of_nodes
31 def self.search(bounding_box, tags = {})
32 min_lon, min_lat, max_lon, max_lat = *bounding_box
33 # @fixme a bit of a hack to search for only visible nodes
34 # couldn't think of another to add to tags condition
35 #conditions_hash = tags.merge({ 'visible' => 1 })
37 # using named placeholders http://www.robbyonrails.com/articles/2005/10/21/using-named-placeholders-in-ruby
41 #conditions_hash.each do |key,value|
42 # keys << "#{key} = :#{key}"
43 # values[key.to_sym] = value
45 #conditions = keys.join(' AND ')
47 find_by_area(min_lat, min_lon, max_lat, max_lon,
48 :conditions => 'visible = 1',
49 :limit => APP_CONFIG['max_number_of_nodes']+1)
52 # Read in xml as text and return it's Node object representation
53 def self.from_xml(xml, create=false)
61 doc.find('//osm/node').each do |pt|
62 node.lat = pt['lat'].to_f
63 node.lon = pt['lon'].to_f
65 return nil unless node.in_world?
69 node.id = pt['id'].to_i
73 node.visible = pt['visible'] and pt['visible'] == 'true'
76 node.timestamp = Time.now
79 node.timestamp = Time.parse(pt['timestamp'])
85 pt.find('tag').each do |tag|
86 node.add_tag_key_val(tag['k'],tag['v'])
97 def save_with_history!
101 # apply timestamp to the new node
107 NodeTag.transaction do
110 NodeTag.delete_all(['id = ?', self.id])
118 tag.sequence_id = sequence_id
124 old_node = OldNode.from_node(self)
125 old_node.timestamp = t
126 old_node.save_with_dependencies!
131 doc = OSM::API.new.get_xml_doc
132 doc.root << to_xml_node()
136 def to_xml_node(user_display_name_cache = nil)
137 el1 = XML::Node.new 'node'
138 el1['id'] = self.id.to_s
139 el1['lat'] = self.lat.to_s
140 el1['lon'] = self.lon.to_s
142 user_display_name_cache = {} if user_display_name_cache.nil?
144 if user_display_name_cache and user_display_name_cache.key?(self.user_id)
145 # use the cache if available
146 elsif self.user.data_public?
147 user_display_name_cache[self.user_id] = self.user.display_name
149 user_display_name_cache[self.user_id] = nil
152 el1['user'] = user_display_name_cache[self.user_id] unless user_display_name_cache[self.user_id].nil?
154 self.tags.each do |k,v|
155 el2 = XML::Node.new('tag')
161 el1['visible'] = self.visible.to_s
162 el1['timestamp'] = self.timestamp.xmlschema
168 Tags.split(self.tags) do |k,v|
177 self.node_tags.each do |tag|
188 def add_tag_key_val(k,v)
189 @tags = Hash.new unless @tags