136 lines
3.6 KiB
Ruby
136 lines
3.6 KiB
Ruby
class OldRelation < ActiveRecord::Base
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include ConsistencyValidations
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include ObjectMetadata
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self.table_name = "relations"
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self.primary_keys = "relation_id", "version"
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# note this needs to be included after the table name changes, or
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# the queries generated by Redactable will use the wrong table name.
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include Redactable
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belongs_to :changeset
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belongs_to :redaction
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belongs_to :current_relation, :class_name => "Relation", :foreign_key => "relation_id"
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has_many :old_members, -> { order(:sequence_id) }, :class_name => 'OldRelationMember', :foreign_key => [:relation_id, :version]
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has_many :old_tags, :class_name => 'OldRelationTag', :foreign_key => [:relation_id, :version]
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validates_associated :changeset
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def self.from_relation(relation)
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old_relation = OldRelation.new
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old_relation.visible = relation.visible
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old_relation.changeset_id = relation.changeset_id
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old_relation.timestamp = relation.timestamp
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old_relation.relation_id = relation.id
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old_relation.version = relation.version
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old_relation.members = relation.members
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old_relation.tags = relation.tags
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return old_relation
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end
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def save_with_dependencies!
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# see comment in old_way.rb ;-)
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save!
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clear_aggregation_cache
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clear_association_cache
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@attributes.update(OldRelation.where(:relation_id => self.relation_id, :timestamp => self.timestamp).order("version DESC").first.instance_variable_get('@attributes'))
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# ok, you can touch from here on
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self.tags.each do |k,v|
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tag = OldRelationTag.new
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tag.k = k
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tag.v = v
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tag.relation_id = self.relation_id
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tag.version = self.version
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tag.save!
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end
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self.members.each_with_index do |m,i|
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member = OldRelationMember.new
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member.id = [self.relation_id, self.version, i]
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member.member_type = m[0].classify
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member.member_id = m[1]
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member.member_role = m[2]
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member.save!
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end
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end
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def members
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unless @members
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@members = Array.new
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self.old_members.order(:sequence_id).each do |m|
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@members += [[m.type,m.id,m.role]]
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end
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end
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@members
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end
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def tags
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unless @tags
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@tags = Hash.new
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self.old_tags.each do |tag|
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@tags[tag.k] = tag.v
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end
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end
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@tags = Hash.new unless @tags
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@tags
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end
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def members=(s)
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@members = s
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end
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def tags=(t)
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@tags = t
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end
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def to_xml
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doc = OSM::API.new.get_xml_doc
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doc.root << to_xml_node()
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return doc
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end
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def to_xml_node(changeset_cache = {}, user_display_name_cache = {})
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el = XML::Node.new 'relation'
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el['id'] = self.relation_id.to_s
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add_metadata_to_xml_node(el, self, changeset_cache, user_display_name_cache)
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self.old_members.each do |member|
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member_el = XML::Node.new 'member'
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member_el['type'] = member.member_type.to_s.downcase
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member_el['ref'] = member.member_id.to_s # "id" is considered uncool here as it should be unique in XML
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member_el['role'] = member.member_role.to_s
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el << member_el
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end
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add_tags_to_xml_node(el, self.old_tags)
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return el
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end
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# Temporary method to match interface to nodes
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def tags_as_hash
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return self.tags
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end
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# Temporary method to match interface to relations
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def relation_members
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return self.old_members
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end
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# Pretend we're not in any relations
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def containing_relation_members
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return []
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end
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# check whether this element is the latest version - that is,
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# has the same version as its "current" counterpart.
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def is_latest_version?
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current_relation.version == self.version
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end
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end
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