class OldWay < ActiveRecord::Base
- set_table_name 'ways'
+ include ConsistencyValidations
+ include ObjectMetadata
- belongs_to :user
+ self.table_name = "ways"
+ self.primary_keys = "way_id", "version"
+ # note this needs to be included after the table name changes, or
+ # the queries generated by Redactable will use the wrong table name.
+ include Redactable
+
+ belongs_to :changeset
+ belongs_to :redaction
+ belongs_to :current_way, :class_name => "Way", :foreign_key => "way_id"
+
+ has_many :old_nodes, :class_name => 'OldWayNode', :foreign_key => [:way_id, :version]
+ has_many :old_tags, :class_name => 'OldWayTag', :foreign_key => [:way_id, :version]
+
+ validates_associated :changeset
+
def self.from_way(way)
old_way = OldWay.new
- old_way.user_id = way.user_id
+ old_way.visible = way.visible
+ old_way.changeset_id = way.changeset_id
old_way.timestamp = way.timestamp
- old_way.id = way.id
- old_way.segs = way.segs
+ old_way.way_id = way.id
+ old_way.version = way.version
+ old_way.nds = way.nds
old_way.tags = way.tags
return old_way
end
- def save_with_dependencies
- t = Time.now
- self.timestamp = t
- self.save
-
+ def save_with_dependencies!
+
+ # dont touch this unless you really have figured out why it's called
+ # (Rails doesn't deal well with the old ways table (called 'ways') because
+ # it doesn't have a unique key. It knows how to insert and auto_increment
+ # id and get it back but we have that and we want to get the 'version' back
+ # we could add another column but thats a lot of data. No, set_primary_key
+ # doesn't work either.
+ save!
+ clear_aggregation_cache
+ clear_association_cache
+ @attributes.update(OldWay.where(:way_id => self.way_id, :timestamp => self.timestamp).order("version DESC").first.instance_variable_get('@attributes'))
+
+ # ok, you can touch from here on
+
self.tags.each do |k,v|
tag = OldWayTag.new
tag.k = k
tag.v = v
- tag.id = self.id
- tag.save
+ tag.way_id = self.way_id
+ tag.version = self.version
+ tag.save!
end
- i = 0
- self.segs.each do |n|
- seg = OldWaySegment.new
- seg.id = self.id
- seg.segment_id = n
- seg.sequence_id = i
- seg.save
- i += 1
+ sequence = 1
+ self.nds.each do |n|
+ nd = OldWayNode.new
+ nd.id = [self.way_id, self.version, sequence]
+ nd.node_id = n
+ nd.save!
+ sequence += 1
end
-
- old_way = OldWay.from_way(self)
- old_way.save
end
- def segs
- @segs = Array.new unless @segs
- @segs
+ def nds
+ @nds ||= self.old_nodes.order(:sequence_id).collect { |n| n.node_id }
end
def tags
- @tags = Hash.new unless @tags
- @tags
+ @tags ||= Hash[self.old_tags.collect { |t| [t.k, t.v] }]
end
- def segs=(s)
- @segs = s
+ def nds=(s)
+ @nds = s
end
def tags=(t)
@tags = t
end
+ def to_xml_node(changeset_cache = {}, user_display_name_cache = {})
+ el = XML::Node.new 'way'
+ el['id'] = self.way_id.to_s
+
+ add_metadata_to_xml_node(el, self, changeset_cache, user_display_name_cache)
+
+ self.old_nodes.each do |nd| # FIXME need to make sure they come back in the right order
+ node_el = XML::Node.new 'nd'
+ node_el['ref'] = nd.node_id.to_s
+ el << node_el
+ end
+
+ add_tags_to_xml_node(el, self.old_tags)
+
+ return el
+ end
+
+ # Read full version of old way
+ # For get_nodes_undelete, uses same nodes, even if they've moved since
+ # For get_nodes_revert, allocates new ids
+ # Currently returns Potlatch-style array
+ # where [5] indicates whether latest version is usable as is (boolean)
+ # (i.e. is it visible? are we actually reverting to an earlier version?)
+
+ def get_nodes_undelete
+ self.nds.collect do |n|
+ node = Node.find(n)
+ [node.lon, node.lat, n, node.version, node.tags_as_hash, node.visible]
+ end
+ end
+
+ def get_nodes_revert(timestamp)
+ points=[]
+ self.nds.each do |n|
+ oldnode = OldNode.where('node_id = ? AND timestamp <= ?', n, timestamp).unredacted.order("timestamp DESC").first
+ curnode = Node.find(n)
+ id = n; reuse = curnode.visible
+ if oldnode.lat != curnode.lat or oldnode.lon != curnode.lon or oldnode.tags != curnode.tags then
+ # node has changed: if it's in other ways, give it a new id
+ if curnode.ways-[self.way_id] then id=-1; reuse=false end
+ end
+ points << [oldnode.lon, oldnode.lat, id, curnode.version, oldnode.tags_as_hash, reuse]
+ end
+ points
+ end
+
+ # Temporary method to match interface to nodes
+ def tags_as_hash
+ return self.tags
+ end
+
+ # Temporary method to match interface to ways
+ def way_nodes
+ return self.old_nodes
+ end
+
+ # Pretend we're not in any relations
+ def containing_relation_members
+ return []
+ end
+
+ # check whether this element is the latest version - that is,
+ # has the same version as its "current" counterpart.
+ def is_latest_version?
+ current_way.version == self.version
+ end
end
projects / rails.git / blobdiff