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
+ validates_presence_of :id, :on => :update
+ validates_presence_of :timestamp,:version, :changeset_id
+ validates_uniqueness_of :id
+ validates_inclusion_of :visible, :in => [ true, false ]
+ validates_numericality_of :id, :on => :update, :integer_only => true
+ validates_numericality_of :changeset_id, :version, :integer_only => true
+ validates_associated :changeset
+
+ TYPES = ["node", "way", "relation"]
+
def self.from_xml(xml, create=false)
begin
- p = XML::Parser.new
- p.string = xml
+ p = XML::Parser.string(xml)
doc = p.parse
doc.find('//osm/relation').each do |pt|
- return Relation.from_xml_node(pt, create)
+ return Relation.from_xml_node(pt, create)
end
- rescue
- return nil
+ rescue LibXML::XML::Error, ArgumentError => ex
+ raise OSM::APIBadXMLError.new("relation", xml, ex.message)
end
end
relation.id = pt['id'].to_i
end
- relation.version = pt['version']
+ raise OSM::APIBadXMLError.new("relation", pt, "You are missing the required changeset in the relation") if pt['changeset'].nil?
relation.changeset_id = pt['changeset']
+ # The follow block does not need to be executed because they are dealt with
+ # in create_with_history, update_from and delete_with_history
if create
- relation.timestamp = Time.now
+ relation.timestamp = Time.now.getutc
relation.visible = true
+ relation.version = 0
else
if pt['timestamp']
relation.timestamp = Time.parse(pt['timestamp'])
end
+ relation.version = pt['version']
end
pt.find('tag').each do |tag|
end
pt.find('member').each do |member|
+ #member_type =
+ logger.debug "each member"
+ raise OSM::APIBadXMLError.new("relation", pt, "The #{member['type']} is not allowed only, #{TYPES.inspect} allowed") unless TYPES.include? member['type']
+ logger.debug "after raise"
+ #member_ref = member['ref']
+ #member_role
+ member['role'] ||= "" # Allow the upload to not include this, in which case we default to an empty string.
+ logger.debug member['role']
relation.add_member(member['type'], member['ref'], member['role'])
end
+ raise OSM::APIBadUserInput.new("Some bad xml in relation") if relation.nil?
return relation
end
# 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
+ raise OSM::APIDuplicateTagsError.new("relation", self.id, k) if @tags.include? k
@tags[k] = v
end
+ ##
+ # updates the changeset bounding box to contain the bounding box of
+ # the element with given +type+ and +id+. this only works with nodes
+ # and ways at the moment, as they're the only elements to respond to
+ # the :bbox call.
+ def update_changeset_element(type, id)
+ element = Kernel.const_get(type.capitalize).find(id)
+ changeset.update_bbox! element.bbox
+ end
+
+ def delete_with_history!(new_relation, user)
+ unless self.visible
+ raise OSM::APIAlreadyDeletedError.new
+ end
+
+ # need to start the transaction here, so that the database can
+ # provide repeatable reads for the used-by checks. this means it
+ # shouldn't be possible to get race conditions.
+ Relation.transaction do
+ check_consistency(self, new_relation, user)
+ # This will check to see if this relation is used by another relation
+ if RelationMember.find(:first, :joins => "INNER JOIN current_relations ON current_relations.id=current_relation_members.id", :conditions => [ "visible = ? AND member_type='relation' and member_id=? ", true, self.id ])
+ raise OSM::APIPreconditionFailedError.new("The relation #{new_relation.id} is a used in another relation")
+ end
+ self.changeset_id = new_relation.changeset_id
+ self.tags = {}
+ self.members = []
+ self.visible = false
+ save_with_history!
+ 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.changeset = new_relation.changeset
+ 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?
+ # These are hastables that store an id in the index of all
+ # the nodes/way/relations that have already been added.
+ # If the member is valid and visible then we add it to the
+ # relevant hash table, with the value true as a cache.
+ # 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}
+ elements = { :node => Hash.new, :way => Hash.new, :relation => Hash.new }
+ self.members.each do |m|
+ # find the hash for the element type or die
+ hash = elements[m[0].to_sym] or return false
+
+ # unless its in the cache already
+ unless hash.key? m[1]
+ # use reflection to look up the appropriate class
+ model = Kernel.const_get(m[0].capitalize)
+
+ # get the element with that ID
+ element = model.find(m[1])
+
+ # and check that it is OK to use.
+ unless element and element.visible? and element.preconditions_ok?
+ return false
+ end
+ hash[m[1]] = true
+ end
+ end
+
+ return true
+ rescue
+ 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
+
+ private
+
def save_with_history!
Relation.transaction do
# have to be a little bit clever here - to detect if any tags
# changed then we have to monitor their before and after state.
tags_changed = false
- t = Time.now
+ t = Time.now.getutc
self.version += 1
self.timestamp = t
self.save!
tag.id = self.id
tag.save!
end
+
+ # reload, so that all of the members are accessible in their
+ # new state.
+ self.reload
# same pattern as before, but this time we're collecting the
# changed members in an array, as the bounding box updates for
end
end
+ # tell the changeset we updated one element only
+ changeset.add_changes! 1
+
# save the (maybe updated) changeset bounding box
changeset.save!
end
end
- ##
- # updates the changeset bounding box to contain the bounding box of
- # the element with given +type+ and +id+. this only works with nodes
- # and ways at the moment, as they're the only elements to respond to
- # the :bbox call.
- def update_changeset_element(type, id)
- element = Kernel.const_get(type.capitalize).find(id)
- changeset.update_bbox! element.bbox
- 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 = ? AND member_type='relation' and member_id=? ", true, 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?
- # These are hastables that store an id in the index of all
- # the nodes/way/relations that have already been added.
- # If the member is valid and visible then we add it to the
- # relevant hash table, with the value true as a cache.
- # 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}
- elements = { :node => Hash.new, :way => Hash.new, :relation => Hash.new }
- self.members.each do |m|
- # find the hash for the element type or die
- hash = elements[m[0].to_sym] or return false
-
- # unless its in the cache already
- unless hash.key? m[1]
- # use reflection to look up the appropriate class
- model = Kernel.const_get(m[0].capitalize)
-
- # get the element with that ID
- element = model.find(m[1])
-
- # and check that it is OK to use.
- unless element and element.visible? and element.preconditions_ok?
- return false
- end
- hash[m[1]] = true
- end
- end
-
- return true
- rescue
- 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