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 after_initialize :log_start_state
12 before_create :ensure_permission_to_create
13 before_update :ensure_permission_to_update
14 before_destroy :ensure_permission_to_destroy
16 before_create :update_modified_by_fields
17 before_update :maybe_update_modified_by_fields
18 after_create :log_create
19 after_update :log_update
20 after_destroy :log_destroy
21 validate :ensure_serialized_attribute_type
22 validate :normalize_collection_uuids
23 validate :ensure_valid_uuids
25 has_many :permissions, :foreign_key => :head_uuid, :class_name => 'Link', :primary_key => :uuid, :conditions => "link_class = 'permission'"
27 class PermissionDeniedError < StandardError
33 class UnauthorizedError < StandardError
39 def self.kind_class(kind)
40 kind.match(/^arvados\#(.+)$/)[1].classify.safe_constantize rescue nil
44 "#{current_api_base}/#{self.class.to_s.pluralize.underscore}/#{self.uuid}"
47 def self.searchable_columns operator
48 textonly_operator = !operator.match(/[<=>]/)
49 self.columns.collect do |col|
50 if [:string, :text].index(col.type)
52 elsif !textonly_operator and [:datetime, :integer].index(col.type)
58 def self.attribute_column attr
59 self.columns.select { |col| col.name == attr.to_s }.first
62 # def eager_load_associations
63 # self.class.columns.each do |col|
64 # re = col.name.match /^(.*)_kind$/
66 # self.respond_to? re[1].to_sym and
67 # (auuid = self.send((re[1] + '_uuid').to_sym)) and
68 # (aclass = self.class.kind_class(self.send(col.name.to_sym))) and
69 # (aobject = aclass.where('uuid=?', auuid).first))
70 # self.instance_variable_set('@'+re[1], aobject)
75 def self.readable_by user
76 uuid_list = [user.uuid, *user.groups_i_can(:read)]
77 sanitized_uuid_list = uuid_list.
78 collect { |uuid| sanitize(uuid) }.join(', ')
80 if self == Link and user
81 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))"
83 where("?=? OR #{table_name}.owner_uuid in (?) OR #{table_name}.uuid=? OR #{table_name}.uuid IN (SELECT head_uuid FROM links WHERE link_class='permission' AND tail_uuid IN (#{sanitized_uuid_list})) #{or_references_me}",
95 def ensure_permission_to_create
96 raise PermissionDeniedError unless permission_to_create
99 def permission_to_create
100 current_user.andand.is_active
103 def ensure_permission_to_update
104 raise PermissionDeniedError unless permission_to_update
107 def permission_to_update
109 logger.warn "Anonymous user tried to update #{self.class.to_s} #{self.uuid_was}"
112 if !current_user.is_active
113 logger.warn "Inactive user #{current_user.uuid} tried to update #{self.class.to_s} #{self.uuid_was}"
116 return true if current_user.is_admin
117 if self.uuid_changed?
118 logger.warn "User #{current_user.uuid} tried to change uuid of #{self.class.to_s} #{self.uuid_was} to #{self.uuid}"
121 if self.owner_uuid_changed?
122 if current_user.uuid == self.owner_uuid or
123 current_user.can? write: self.owner_uuid
124 # current_user is, or has :write permission on, the new owner
126 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}"
130 if current_user.uuid == self.owner_uuid_was or
131 current_user.uuid == self.uuid or
132 current_user.can? write: self.owner_uuid_was
133 # current user is, or has :write permission on, the previous owner
136 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}"
141 def ensure_permission_to_destroy
142 raise PermissionDeniedError unless permission_to_destroy
145 def permission_to_destroy
149 def maybe_update_modified_by_fields
150 update_modified_by_fields if self.changed? or self.new_record?
153 def update_modified_by_fields
154 self.updated_at = Time.now
155 self.owner_uuid ||= current_default_owner if self.respond_to? :owner_uuid=
156 self.modified_at = Time.now
157 self.modified_by_user_uuid = current_user ? current_user.uuid : nil
158 self.modified_by_client_uuid = current_api_client ? current_api_client.uuid : nil
161 def ensure_serialized_attribute_type
162 # Specifying a type in the "serialize" declaration causes rails to
163 # raise an exception if a different data type is retrieved from
164 # the database during load(). The validation preventing such
165 # crash-inducing records from being inserted in the database in
166 # the first place seems to have been left as an exercise to the
168 self.class.serialized_attributes.each do |colname, attr|
170 unless self.attributes[colname].is_a? attr.object_class
171 self.errors.add colname.to_sym, "must be a #{attr.object_class.to_s}"
177 def foreign_key_attributes
178 attributes.keys.select { |a| a.match /_uuid$/ }
181 def skip_uuid_read_permission_check
182 %w(modified_by_client_uuid)
185 def skip_uuid_existence_check
189 def normalize_collection_uuids
190 foreign_key_attributes.each do |attr|
191 attr_value = send attr
192 if attr_value.is_a? String and
193 attr_value.match /^[0-9a-f]{32,}(\+[@\w]+)*$/
195 send "#{attr}=", Collection.normalize_uuid(attr_value)
197 # TODO: abort instead of silently accepting unnormalizable value?
203 @@UUID_REGEX = /^[0-9a-z]{5}-([0-9a-z]{5})-[0-9a-z]{15}$/
205 @@prefixes_hash = nil
206 def self.uuid_prefixes
207 unless @@prefixes_hash
209 ActiveRecord::Base.descendants.reject(&:abstract_class?).each do |k|
210 if k.respond_to?(:uuid_prefix)
211 @@prefixes_hash[k.uuid_prefix] = k
218 def self.uuid_like_pattern
219 "_____-#{uuid_prefix}-_______________"
222 def ensure_valid_uuids
223 specials = [system_user_uuid, 'd41d8cd98f00b204e9800998ecf8427e+0']
225 foreign_key_attributes.each do |attr|
226 if new_record? or send (attr + "_changed?")
227 next if skip_uuid_existence_check.include? attr
228 attr_value = send attr
229 next if specials.include? attr_value
231 if (r = ArvadosModel::resource_class_for_uuid attr_value)
232 unless skip_uuid_read_permission_check.include? attr
233 r = r.readable_by(current_user)
235 if r.where(uuid: attr_value).count == 0
236 errors.add(attr, "'#{attr_value}' not found")
253 def self.readable_by (u)
258 [{:uuid => u[:uuid]}]
262 def self.resource_class_for_uuid(uuid)
263 if uuid.is_a? ArvadosModel
266 unless uuid.is_a? String
269 if uuid.match /^[0-9a-f]{32}(\+[^,]+)*(,[0-9a-f]{32}(\+[^,]+)*)*$/
274 Rails.application.eager_load!
275 uuid.match @@UUID_REGEX do |re|
276 return uuid_prefixes[re[1]] if uuid_prefixes[re[1]]
279 if uuid.match /.+@.+/
288 @old_attributes = logged_attributes
291 def log_change(event_type)
292 log = Log.new(event_type: event_type).fill_object(self)
299 log_change('create') do |log|
300 log.fill_properties('old', nil, nil)
306 log_change('update') do |log|
307 log.fill_properties('old', @old_etag, @old_attributes)
313 log_change('destroy') do |log|
314 log.fill_properties('old', @old_etag, @old_attributes)