2 class ArvadosModel < ActiveRecord::Base
3 self.abstract_class = true
5 include CurrentApiClient # current_user, current_api_client, etc.
7 attr_protected :created_at
8 attr_protected :modified_by_user_uuid
9 attr_protected :modified_by_client_uuid
10 attr_protected :modified_at
11 before_create :ensure_permission_to_create
12 before_update :ensure_permission_to_update
13 before_destroy :ensure_permission_to_destroy
14 before_create :update_modified_by_fields
15 before_update :maybe_update_modified_by_fields
16 validate :ensure_serialized_attribute_type
17 validate :normalize_collection_uuids
19 has_many :permissions, :foreign_key => :head_uuid, :class_name => 'Link', :primary_key => :uuid, :conditions => "link_class = 'permission'"
21 class PermissionDeniedError < StandardError
27 class UnauthorizedError < StandardError
33 def self.kind_class(kind)
34 kind.match(/^arvados\#(.+?)(_list|List)?$/)[1].pluralize.classify.constantize rescue nil
38 "#{current_api_base}/#{self.class.to_s.pluralize.underscore}/#{self.uuid}"
41 def self.searchable_columns
42 self.columns.collect do |col|
43 if [:string, :text, :datetime, :integer].index(col.type) && col.name != 'owner_uuid'
49 def self.attribute_column attr
50 self.columns.select { |col| col.name == attr.to_s }.first
53 def eager_load_associations
54 self.class.columns.each do |col|
55 re = col.name.match /^(.*)_kind$/
57 self.respond_to? re[1].to_sym and
58 (auuid = self.send((re[1] + '_uuid').to_sym)) and
59 (aclass = self.class.kind_class(self.send(col.name.to_sym))) and
60 (aobject = aclass.where('uuid=?', auuid).first))
61 self.instance_variable_set('@'+re[1], aobject)
66 def self.readable_by user
67 uuid_list = [user.uuid, *user.groups_i_can(:read)]
68 sanitized_uuid_list = uuid_list.
69 collect { |uuid| sanitize(uuid) }.join(', ')
71 if self == Link and user
72 or_references_me = "OR (#{table_name}.link_class in (#{sanitize 'permission'}, #{sanitize 'resources'}) AND #{sanitize user.uuid} IN (#{table_name}.head_uuid, #{table_name}.tail_uuid))"
74 joins("LEFT JOIN links permissions ON permissions.head_uuid in (#{table_name}.owner_uuid, #{table_name}.uuid) AND permissions.tail_uuid in (#{sanitized_uuid_list}) AND permissions.link_class='permission'").
75 where("?=? OR #{table_name}.owner_uuid in (?) OR #{table_name}.uuid=? OR permissions.head_uuid IS NOT NULL #{or_references_me}",
83 def ensure_permission_to_create
84 raise PermissionDeniedError unless permission_to_create
87 def permission_to_create
88 current_user.andand.is_active
91 def ensure_permission_to_update
92 raise PermissionDeniedError unless permission_to_update
95 def permission_to_update
97 logger.warn "Anonymous user tried to update #{self.class.to_s} #{self.uuid_was}"
100 if !current_user.is_active
101 logger.warn "Inactive user #{current_user.uuid} tried to update #{self.class.to_s} #{self.uuid_was}"
104 return true if current_user.is_admin
105 if self.uuid_changed?
106 logger.warn "User #{current_user.uuid} tried to change uuid of #{self.class.to_s} #{self.uuid_was} to #{self.uuid}"
109 if self.owner_uuid_changed?
110 if current_user.uuid == self.owner_uuid or
111 current_user.can? write: self.owner_uuid
112 # current_user is, or has :write permission on, the new owner
114 logger.warn "User #{current_user.uuid} tried to change owner_uuid of #{self.class.to_s} #{self.uuid} to #{self.owner_uuid} but does not have permission to write to #{self.owner_uuid}"
118 if current_user.uuid == self.owner_uuid_was or
119 current_user.uuid == self.uuid or
120 current_user.can? write: self.owner_uuid_was
121 # current user is, or has :write permission on, the previous owner
124 logger.warn "User #{current_user.uuid} tried to modify #{self.class.to_s} #{self.uuid} but does not have permission to write #{self.owner_uuid_was}"
129 def ensure_permission_to_destroy
130 raise PermissionDeniedError unless permission_to_destroy
133 def permission_to_destroy
137 def maybe_update_modified_by_fields
138 update_modified_by_fields if self.changed?
141 def update_modified_by_fields
142 self.created_at ||= Time.now
143 self.owner_uuid ||= current_default_owner if self.respond_to? :owner_uuid=
144 self.modified_at = Time.now
145 self.modified_by_user_uuid = current_user ? current_user.uuid : nil
146 self.modified_by_client_uuid = current_api_client ? current_api_client.uuid : nil
149 def ensure_serialized_attribute_type
150 # Specifying a type in the "serialize" declaration causes rails to
151 # raise an exception if a different data type is retrieved from
152 # the database during load(). The validation preventing such
153 # crash-inducing records from being inserted in the database in
154 # the first place seems to have been left as an exercise to the
156 self.class.serialized_attributes.each do |colname, attr|
158 unless self.attributes[colname].is_a? attr.object_class
159 self.errors.add colname.to_sym, "must be a #{attr.object_class.to_s}"
165 def foreign_key_attributes
166 attributes.keys.select { |a| a.match /_uuid$/ }
169 def normalize_collection_uuids
170 foreign_key_attributes.each do |attr|
171 attr_value = send attr
172 if attr_value.is_a? String and
173 attr_value.match /^[0-9a-f]{32,}(\+[@\w]+)*$/
175 send "#{attr}=", Collection.normalize_uuid(attr_value)
177 # TODO: abort instead of silently accepting unnormalizable value?
183 def self.resource_class_for_uuid(uuid)
184 if uuid.is_a? ArvadosModel
187 unless uuid.is_a? String
190 if uuid.match /^[0-9a-f]{32}(\+[^,]+)*(,[0-9a-f]{32}(\+[^,]+)*)*$/
195 Rails.application.eager_load!
196 uuid.match /^[0-9a-z]{5}-([0-9a-z]{5})-[0-9a-z]{15}$/ do |re|
197 ActiveRecord::Base.descendants.reject(&:abstract_class?).each do |k|
198 if k.respond_to?(:uuid_prefix)
199 if k.uuid_prefix == re[1]