class Relation < ActiveRecord::Base
require 'xml/libxml'
+ set_table_name 'current_relations'
+
belongs_to :user
+ has_many :old_relations, :foreign_key => 'id', :order => 'version'
+
has_many :relation_members, :foreign_key => 'id'
has_many :relation_tags, :foreign_key => 'id'
- has_many :old_relations, :foreign_key => 'id', :order => 'version'
-
- set_table_name 'current_relations'
+ 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
def self.from_xml(xml, create=false)
begin
return el1
end
- def self.find_for_nodes_and_ways(node_ids, way_ids)
- # 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...
- return [] if node_ids.empty? and node_ids.empty?
- relations = Array.new
- 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(',')})")
+ 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
- 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(',')})")
+ end
+
+ 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
unless @members
- @members = Array.new
- self.relation_members.each do |member|
- @members += [[member.member_type,member.member_id,member.member_role]]
- end
+ @members = Array.new
+ self.relation_members.each do |member|
+ @members += [[member.member_type,member.member_id,member.member_role]]
+ end
end
@members
end
def tags
unless @tags
- @tags = Hash.new
- self.relation_tags.each do |tag|
- @tags[tag.k] = tag.v
- end
+ @tags = Hash.new
+ self.relation_tags.each do |tag|
+ @tags[tag.k] = tag.v
+ end
end
@tags
end
RelationTag.delete_all(['id = ?', self.id])
tags.each do |k,v|
- tag = RelationTag.new
- tag.k = k
- tag.v = v
- tag.id = self.id
- tag.save!
+ tag = RelationTag.new
+ tag.k = k
+ tag.v = v
+ tag.id = self.id
+ tag.save!
end
members = self.members
RelationMember.delete_all(['id = ?', self.id])
members.each do |n|
- mem = RelationMember.new
- mem.id = self.id
- mem.member_type = n[0];
- mem.member_id = n[1];
- mem.member_role = n[2];
- mem.save!
+ mem = RelationMember.new
+ mem.id = self.id
+ mem.member_type = n[0];
+ mem.member_id = n[1];
+ mem.member_role = n[2];
+ mem.save!
end
old_relation = OldRelation.from_relation(self)
end
def preconditions_ok?
+ # These are hastables that store an id in the index of all
+ # the nodes/way/relations that have already been added.
+ # Once we know the id of the node/way/relation exists
+ # we check to see if it is already existing in the hashtable
+ # if it does, then we return false. Otherwise
+ # we add it to the relevant hash table, with the value true..
+ # Thus if you have nodes with the ids of 50 and 1 already in the
+ # relation, then the hash table nodes would contain:
+ # => {50=>true, 1=>true}
+ nodes = Hash.new
+ ways = Hash.new
+ relations = Hash.new
self.members.each do |m|
if (m[0] == "node")
n = Node.find(:first, :conditions => ["id = ?", m[1]])
unless n and n.visible
return false
end
+ if nodes[m[1]]
+ return false
+ else
+ nodes[m[1]] = true
+ end
elsif (m[0] == "way")
w = Way.find(:first, :conditions => ["id = ?", m[1]])
unless w and w.visible and w.preconditions_ok?
return false
end
+ if ways[m[1]]
+ return false
+ else
+ ways[m[1]] = true
+ end
elsif (m[0] == "relation")
e = Relation.find(:first, :conditions => ["id = ?", m[1]])
unless e and e.visible and e.preconditions_ok?
return false
end
+ if relations[m[1]]
+ return false
+ else
+ relations[m[1]] = true
+ end
else
return false
end
return false
end
+ # Temporary method to match interface to nodes
+ def tags_as_hash
+ return self.tags
+ end
end
projects / rails.git / blobdiff