app/models/old_relation.rb

   1 class OldRelation < ActiveRecord::Base
   2   include ConsistencyValidations
   3
   4   set_table_name 'relations'
   5
   6   belongs_to :changeset
   7
   8   validates_associated :changeset
   9
  10   def self.from_relation(relation)
  11     old_relation = OldRelation.new
  12     old_relation.visible = relation.visible
  13     old_relation.changeset_id = relation.changeset_id
  14     old_relation.timestamp = relation.timestamp
  15     old_relation.id = relation.id
  16     old_relation.version = relation.version
  17     old_relation.members = relation.members
  18     old_relation.tags = relation.tags
  19     return old_relation
  20   end
  21
  22   def save_with_dependencies!
  23
  24     # see comment in old_way.rb ;-)
  25     save!
  26     clear_aggregation_cache
  27     clear_association_cache
  28     @attributes.update(OldRelation.where('id = ? AND timestamp = ?', self.id, self.timestamp).order("version DESC").first.instance_variable_get('@attributes'))
  29
  30     # ok, you can touch from here on
  31
  32     self.tags.each do |k,v|
  33       tag = OldRelationTag.new
  34       tag.k = k
  35       tag.v = v
  36       tag.id = self.id
  37       tag.version = self.version
  38       tag.save!
  39     end
  40
  41     self.members.each_with_index do |m,i|
  42       member = OldRelationMember.new
  43       member.id = [self.id, self.version, i]
  44       member.member_type = m[0].classify
  45       member.member_id = m[1]
  46       member.member_role = m[2]
  47       member.save!
  48     end
  49   end
  50
  51   def members
  52     unless @members
  53         @members = Array.new
  54         OldRelationMember.where("id = ? AND version = ?", self.id, self.version).order(:sequence_id).each do |m|
  55             @members += [[m.type,m.id,m.role]]
  56         end
  57     end
  58     @members
  59   end
  60
  61   def tags
  62     unless @tags
  63         @tags = Hash.new
  64         OldRelationTag.where("id = ? AND version = ?", self.id, self.version).each do |tag|
  65             @tags[tag.k] = tag.v
  66         end
  67     end
  68     @tags = Hash.new unless @tags
  69     @tags
  70   end
  71
  72   def members=(s)
  73     @members = s
  74   end
  75
  76   def tags=(t)
  77     @tags = t
  78   end
  79
  80 #  has_many :relation_segments, :class_name => 'OldRelationSegment', :foreign_key => 'id'
  81 #  has_many :relation_tags, :class_name => 'OldRelationTag', :foreign_key => 'id'
  82
  83   def old_members
  84     OldRelationMember.where('id = ? AND version = ?', self.id, self.version).order(:sequence_id)
  85   end
  86
  87   def old_tags
  88     OldRelationTag.where('id = ? AND version = ?', self.id, self.version)
  89   end
  90
  91   def to_xml
  92     doc = OSM::API.new.get_xml_doc
  93     doc.root << to_xml_node()
  94     return doc
  95   end
  96
  97   def to_xml_node
  98     el1 = XML::Node.new 'relation'
  99     el1['id'] = self.id.to_s
 100     el1['visible'] = self.visible.to_s
 101     el1['timestamp'] = self.timestamp.xmlschema
 102     if self.changeset.user.data_public?
 103       el1['user'] = self.changeset.user.display_name
 104       el1['uid'] = self.changeset.user.id.to_s
 105     end
 106     el1['version'] = self.version.to_s
 107     el1['changeset'] = self.changeset_id.to_s
 108
 109     self.old_members.each do |member|
 110       e = XML::Node.new 'member'
 111       e['type'] = member.member_type.to_s.downcase
 112       e['ref'] = member.member_id.to_s # "id" is considered uncool here as it should be unique in XML
 113       e['role'] = member.member_role.to_s
 114       el1 << e
 115     end
 116
 117     self.old_tags.each do |tag|
 118       e = XML::Node.new 'tag'
 119       e['k'] = tag.k
 120       e['v'] = tag.v
 121       el1 << e
 122     end
 123     return el1
 124   end
 125
 126   # Temporary method to match interface to nodes
 127   def tags_as_hash
 128     return self.tags
 129   end
 130
 131   # Temporary method to match interface to relations
 132   def relation_members
 133     return self.old_members
 134   end
 135
 136   # Pretend we're not in any relations
 137   def containing_relation_members
 138     return []
 139   end
 140 end