Make more use of named scopes

[rails.git] / app / models / relation.rb

diff --git a/app/models/relation.rb b/app/models/relation.rb
index 8078cf86097a597e9cdf9d4f0dc07ca47b19ccb1..d5a6d5dc0caf8e7616d19365ccc3a34572a12464 100644 (file)
--- a/app/models/relation.rb
+++ b/app/models/relation.rb
@@ -23,6 +23,12 @@ class Relation < ActiveRecord::Base
   validates_numericality_of :changeset_id, :version, :integer_only => true
   validates_associated :changeset
   
   validates_numericality_of :changeset_id, :version, :integer_only => true
   validates_associated :changeset
   

+  scope :visible, where(:visible => true)
+  scope :invisible, where(:visible => false)
+  scope :nodes, lambda { |*ids| joins(:relation_members).where(:current_relation_members => { :member_type => "Node", :member_id => ids }) }
+  scope :ways, lambda { |*ids| joins(:relation_members).where(:current_relation_members => { :member_type => "Way", :member_id => ids }) }
+  scope :relations, lambda { |*ids| joins(:relation_members).where(:current_relation_members => { :member_type => "Relation", :member_id => ids }) }
+

   TYPES = ["node", "way", "relation"]
 
   def self.from_xml(xml, create=false)
   TYPES = ["node", "way", "relation"]
 
   def self.from_xml(xml, create=false)


@@ -33,6 +39,7 @@ class Relation < ActiveRecord::Base
       doc.find('//osm/relation').each do |pt|
         return Relation.from_xml_node(pt, create)
       end
       doc.find('//osm/relation').each do |pt|
         return Relation.from_xml_node(pt, create)
       end

+      raise OSM::APIBadXMLError.new("node", xml, "XML doesn't contain an osm/relation element.")

     rescue LibXML::XML::Error, ArgumentError => ex
       raise OSM::APIBadXMLError.new("relation", xml, ex.message)
     end
     rescue LibXML::XML::Error, ArgumentError => ex
       raise OSM::APIBadXMLError.new("relation", xml, ex.message)
     end


@@ -41,27 +48,27 @@ class Relation < ActiveRecord::Base
   def self.from_xml_node(pt, create=false)
     relation = Relation.new
 
   def self.from_xml_node(pt, create=false)
     relation = Relation.new
 

-    if !create and pt['id'] != '0'
-      relation.id = pt['id'].to_i
-    end
-
-    raise OSM::APIBadXMLError.new("relation", pt, "You are missing the required changeset in the relation") if pt['changeset'].nil?
+    raise OSM::APIBadXMLError.new("relation", pt, "Version is required when updating") unless create or not pt['version'].nil?
+    relation.version = pt['version']
+    raise OSM::APIBadXMLError.new("relation", pt, "Changeset id is missing") if pt['changeset'].nil?

     relation.changeset_id = pt['changeset']
     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.getutc
-      relation.visible = true
-      relation.version = 0
-    else
-      if pt['timestamp']
-        relation.timestamp = Time.parse(pt['timestamp'])
-      end
-      relation.version = pt['version']
+    
+    unless create
+      raise OSM::APIBadXMLError.new("relation", pt, "ID is required when updating") if pt['id'].nil?
+      relation.id = pt['id'].to_i
+      # .to_i will return 0 if there is no number that can be parsed. 
+      # We want to make sure that there is no id with zero anyway
+      raise OSM::APIBadUserInput.new("ID of relation cannot be zero when updating.") if relation.id == 0

     end
     end

+    
+    # We don't care about the timestamp nor the visibility as these are either
+    # set explicitly or implicit in the action. The visibility is set to true, 
+    # and manually set to false before the actual delete.
+    relation.visible = true

 
     pt.find('tag').each do |tag|
 
     pt.find('tag').each do |tag|

+      raise OSM::APIBadXMLError.new("relation", pt, "tag is missing key") if tag['k'].nil?
+      raise OSM::APIBadXMLError.new("relation", pt, "tag is missing value") if tag['v'].nil?

       relation.add_tag_keyval(tag['k'], tag['v'])
     end
 
       relation.add_tag_keyval(tag['k'], tag['v'])
     end
 


@@ -147,36 +154,6 @@ class Relation < ActiveRecord::Base
     return el1
   end 
 
     return el1
   end 
 

-  def self.find_for_nodes(ids, options = {})
-    if ids.empty?
-      return []
-    else
-      self.with_scope(:find => { :joins => "INNER JOIN current_relation_members AS crm ON crm.id = current_relations.id", :conditions => "crm.member_type = 'Node' AND crm.member_id IN (#{ids.join(',')})" }) do
-        return self.find(:all, options)
-      end
-    end
-  end
-
-  def self.find_for_ways(ids, options = {})
-    if ids.empty?
-      return []
-    else
-      self.with_scope(:find => { :joins => "INNER JOIN current_relation_members AS crm ON crm.id = current_relations.id", :conditions => "crm.member_type = 'Way' AND crm.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 AS crm ON crm.id = current_relations.id", :conditions => "crm.member_type = 'Relation' AND crm.member_id IN (#{ids.join(',')})" }) do
-        return self.find(:all, options)
-      end
-    end
-  end
-

   # FIXME is this really needed?
   def members
     unless @members
   # FIXME is this really needed?
   def members
     unless @members


@@ -208,7 +185,7 @@ class Relation < ActiveRecord::Base
 
   def add_member(type,id,role)
     @members = Array.new unless @members
 
   def add_member(type,id,role)
     @members = Array.new unless @members

-    @members += [[type,id,role]]
+    @members += [[type,id.to_i,role]]

   end
 
   def add_tag_keyval(k, v)
   end
 
   def add_tag_keyval(k, v)


@@ -218,11 +195,6 @@ class Relation < ActiveRecord::Base
     # in the hash to be overwritten.
     raise OSM::APIDuplicateTagsError.new("relation", self.id, k) if @tags.include? k
 
     # in the hash to be overwritten.
     raise OSM::APIDuplicateTagsError.new("relation", self.id, k) if @tags.include? k
 

-    # check tag size here, as we don't create a RelationTag object until
-    # just before we save...
-    raise OSM::APIBadUserInput.new("Relation #{self.id} has a tag with too long a key, '#{k}'.") if k.length > 255
-    raise OSM::APIBadUserInput.new("Relation #{self.id} has a tag with too long a value, '#{k}'='#{v}'.") if v.length > 255
-

     @tags[k] = v
   end
 
     @tags[k] = v
   end
 


@@ -245,10 +217,10 @@ class Relation < ActiveRecord::Base
     # provide repeatable reads for the used-by checks. this means it
     # shouldn't be possible to get race conditions.
     Relation.transaction do
     # provide repeatable reads for the used-by checks. this means it
     # shouldn't be possible to get race conditions.
     Relation.transaction do

+      self.lock!

       check_consistency(self, new_relation, user)
       # This will check to see if this relation is used by another relation
       check_consistency(self, new_relation, user)
       # This will check to see if this relation is used by another relation

-      rel = RelationMember.find(:first, :joins => :relation, 
-                                :conditions => [ "visible = ? AND member_type='Relation' and member_id=? ", true, self.id ])
+      rel = RelationMember.joins(:relation).where("visible = ? AND member_type = 'Relation' and member_id = ? ", true, self.id).first

       raise OSM::APIPreconditionFailedError.new("The relation #{new_relation.id} is used in relation #{rel.relation.id}.") unless rel.nil?
 
       self.changeset_id = new_relation.changeset_id
       raise OSM::APIPreconditionFailedError.new("The relation #{new_relation.id} is used in relation #{rel.relation.id}.") unless rel.nil?
 
       self.changeset_id = new_relation.changeset_id


@@ -260,16 +232,19 @@ class Relation < ActiveRecord::Base
   end
 
   def update_from(new_relation, user)
   end
 
   def update_from(new_relation, user)

-    check_consistency(self, new_relation, user)
-    unless new_relation.preconditions_ok?(self.members)
-      raise OSM::APIPreconditionFailedError.new("Cannot update relation #{self.id}: data or member data is invalid.")
+    Relation.transaction do
+      self.lock!
+      check_consistency(self, new_relation, user)
+      unless new_relation.preconditions_ok?(self.members)
+        raise OSM::APIPreconditionFailedError.new("Cannot update relation #{self.id}: data or member data is invalid.")
+      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
     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)
   end
   
   def create_with_history(user)


@@ -303,7 +278,7 @@ class Relation < ActiveRecord::Base
         # use reflection to look up the appropriate class
         model = Kernel.const_get(m[0].capitalize)
         # get the element with that ID
         # use reflection to look up the appropriate class
         model = Kernel.const_get(m[0].capitalize)
         # get the element with that ID

-        element = model.find(:first, :conditions =>["id = ?", m[1]])
+        element = model.where(:id => m[1]).first

 
         # and check that it is OK to use.
         unless element and element.visible? and element.preconditions_ok?
 
         # and check that it is OK to use.
         unless element and element.visible? and element.preconditions_ok?


@@ -386,21 +361,18 @@ class Relation < ActiveRecord::Base
       # changed members in an array, as the bounding box updates for
       # elements are per-element, not blanked on/off like for tags.
       changed_members = Array.new
       # changed members in an array, as the bounding box updates for
       # elements are per-element, not blanked on/off like for tags.
       changed_members = Array.new

-      members = Hash.new
-      self.members.each do |m|
-        # should be: h[[m.id, m.type]] = m.role, but someone prefers arrays
-        members[[m[1], m[0]]] = m[2]
-      end
-      relation_members.each do |old_member|
-        key = [old_member.member_id.to_s, old_member.member_type]
-        if members.has_key? key
-          members.delete key
-        else
+      members = self.members.clone
+      self.relation_members.each do |old_member|
+        key = [old_member.member_type, old_member.member_id, old_member.member_role]
+        i = members.index key
+        if i.nil?

           changed_members << key
           changed_members << key

+        else
+          members.delete_at i

         end
       end
       # any remaining members must be new additions
         end
       end
       # any remaining members must be new additions

-      changed_members += members.keys
+      changed_members += members

 
       # update the members. first delete all the old members, as the new
       # members may be in a different order and i don't feel like implementing
 
       # update the members. first delete all the old members, as the new
       # members may be in a different order and i don't feel like implementing


@@ -434,21 +406,17 @@ class Relation < ActiveRecord::Base
         changed_members.collect { |id,type| type == "relation" }.
         inject(false) { |b,s| b or s }
 
         changed_members.collect { |id,type| type == "relation" }.
         inject(false) { |b,s| b or s }
 

-      if tags_changed or any_relations
-        # add all non-relation bounding boxes to the changeset
-        # FIXME: check for tag changes along with element deletions and
-        # make sure that the deleted element's bounding box is hit.
-        self.members.each do |type, id, role|
-          if type != "Relation"
-            update_changeset_element(type, id)
-          end
-        end
-      else
-        # add only changed members to the changeset
-        changed_members.each do |id, type|
-          if type != "Relation"
-            update_changeset_element(type, id)
-          end
+      update_members = if tags_changed or any_relations
+                         # add all non-relation bounding boxes to the changeset
+                         # FIXME: check for tag changes along with element deletions and
+                         # make sure that the deleted element's bounding box is hit.
+                         self.members
+                       else 
+                         changed_members
+                       end
+      update_members.each do |type, id, role|
+        if type != "Relation"
+          update_changeset_element(type, id)

         end
       end
 
         end
       end