app/models/old_relation.rb

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