class Relation < ActiveRecord::Base
require 'xml/libxml'
+ include ConsistencyValidations
+
set_table_name 'current_relations'
- belongs_to :user
+ belongs_to :changeset
has_many :old_relations, :foreign_key => 'id', :order => 'version'
has_many :relation_tags, :foreign_key => 'id'
has_many :containing_relation_members, :class_name => "RelationMember", :as => :member
- has_many :containing_relations, :class_name => "Relation", :through => :containing_relation_members, :source => :relation
+ has_many :containing_relations, :class_name => "Relation", :through => :containing_relation_members, :source => :relation, :extend => ObjectFinder
def self.from_xml(xml, create=false)
begin
p.string = xml
doc = p.parse
- relation = Relation.new
-
doc.find('//osm/relation').each do |pt|
- if !create and pt['id'] != '0'
- relation.id = pt['id'].to_i
- end
+ return Relation.from_xml_node(pt, create)
+ end
+ rescue
+ return nil
+ end
+ end
- if create
- relation.timestamp = Time.now
- relation.visible = true
- else
- if pt['timestamp']
- relation.timestamp = Time.parse(pt['timestamp'])
- end
- end
+ def self.from_xml_node(pt, create=false)
+ relation = Relation.new
- pt.find('tag').each do |tag|
- relation.add_tag_keyval(tag['k'], tag['v'])
- end
+ if !create and pt['id'] != '0'
+ relation.id = pt['id'].to_i
+ end
- pt.find('member').each do |member|
- relation.add_member(member['type'], member['ref'], member['role'])
- end
+ relation.version = pt['version']
+ relation.changeset_id = pt['changeset']
+
+ if create
+ relation.timestamp = Time.now
+ relation.visible = true
+ else
+ if pt['timestamp']
+ relation.timestamp = Time.parse(pt['timestamp'])
end
- rescue
- relation = nil
+ end
+
+ pt.find('tag').each do |tag|
+ relation.add_tag_keyval(tag['k'], tag['v'])
+ end
+
+ pt.find('member').each do |member|
+ relation.add_member(member['type'], member['ref'], member['role'])
end
return relation
el1['id'] = self.id.to_s
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?
+ el1['user'] = user_display_name_cache[self.changeset.user_id] unless user_display_name_cache[self.changeset.user_id].nil?
self.relation_members.each do |member|
p=0
return el1
end
-
- # collect relationships. currently done in one big block at the end;
- # may need to move this upwards if people want automatic completion of
- # relationships, i.e. deliver referenced objects like we do with ways...
- # FIXME: rip out the fucking SQL
- def self.find_for_nodes_and_ways(node_ids, way_ids)
- relations = []
-
- if node_ids.length > 0
- relations += Relation.find_by_sql("select e.* from current_relations e,current_relation_members em where " +
- "e.visible=1 and " +
- "em.id = e.id and em.member_type='node' and em.member_id in (#{node_ids.join(',')})")
- end
- if way_ids.length > 0
- relations += Relation.find_by_sql("select e.* from current_relations e,current_relation_members em where " +
- "e.visible=1 and " +
- "em.id = e.id and em.member_type='way' and em.member_id in (#{way_ids.join(',')})")
+ def self.find_for_nodes(ids, options = {})
+ if ids.empty?
+ return []
+ else
+ self.with_scope(:find => { :joins => "INNER JOIN current_relation_members ON current_relation_members.id = current_relations.id", :conditions => "current_relation_members.member_type = 'node' AND current_relation_members.member_id IN (#{ids.join(',')})" }) do
+ return self.find(:all, options)
+ end
end
+ end
- relations # if you don't do this then it returns nil and not []
+ def self.find_for_ways(ids, options = {})
+ if ids.empty?
+ return []
+ else
+ self.with_scope(:find => { :joins => "INNER JOIN current_relation_members ON current_relation_members.id = current_relations.id", :conditions => "current_relation_members.member_type = 'way' AND current_relation_members.member_id IN (#{ids.join(',')})" }) do
+ return self.find(:all, options)
+ end
+ end
end
+ def self.find_for_relations(ids, options = {})
+ if ids.empty?
+ return []
+ else
+ self.with_scope(:find => { :joins => "INNER JOIN current_relation_members ON current_relation_members.id = current_relations.id", :conditions => "current_relation_members.member_type = 'relation' AND current_relation_members.member_id IN (#{ids.join(',')})" }) do
+ return self.find(:all, options)
+ end
+ end
+ end
# FIXME is this really needed?
def members
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
def save_with_history!
Relation.transaction do
t = Time.now
+ self.version += 1
self.timestamp = t
self.save!
tags = self.tags
-
RelationTag.delete_all(['id = ?', self.id])
-
tags.each do |k,v|
tag = RelationTag.new
tag.k = k
end
members = self.members
-
RelationMember.delete_all(['id = ?', self.id])
-
members.each do |n|
mem = RelationMember.new
mem.id = self.id
old_relation = OldRelation.from_relation(self)
old_relation.timestamp = t
old_relation.save_with_dependencies!
+
+ # update the bbox of the changeset and save it too.
+ # FIXME: what is the bounding box of a relation?
+ end
+ end
+
+ def delete_with_history!(new_relation, user)
+ if self.visible
+ check_consistency(self, new_relation, user)
+ if RelationMember.find(:first, :joins => "INNER JOIN current_relations ON current_relations.id=current_relation_members.id", :conditions => [ "visible = 1 AND member_type='relation' and member_id=? ", self.id ])
+ raise OSM::APIPreconditionFailedError.new
+ else
+ self.changeset_id = new_relation.changeset_id
+ self.tags = []
+ self.members = []
+ self.visible = false
+ save_with_history!
+ end
+ else
+ raise OSM::APIAlreadyDeletedError.new
+ end
+ end
+
+ def update_from(new_relation, user)
+ check_consistency(self, new_relation, user)
+ if !new_relation.preconditions_ok?
+ raise OSM::APIPreconditionFailedError.new
+ end
+ self.changeset_id = new_relation.changeset_id
+ self.tags = new_relation.tags
+ self.members = new_relation.members
+ 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
end
+ # Temporary method to match interface to nodes
+ def tags_as_hash
+ return self.tags
+ end
+
+ ##
+ # if any members are referenced by placeholder IDs (i.e: negative) then
+ # this calling this method will fix them using the map from placeholders
+ # to IDs +id_map+.
+ def fix_placeholders!(id_map)
+ self.members.map! do |type, id, role|
+ old_id = id.to_i
+ if old_id < 0
+ new_id = id_map[type.to_sym][old_id]
+ raise "invalid placeholder" if new_id.nil?
+ [type, new_id, role]
+ else
+ [type, id, role]
+ end
+ end
+ end
+
end
projects / rails.git / blobdiff