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\#(.+)$/)[1].classify.safe_constantize rescue nil
44 "#{current_api_base}/#{self.class.to_s.pluralize.underscore}/#{self.uuid}"
47 def self.searchable_columns operator
48 textonly_operator = !operator.match(/[<=>]/)
49 self.columns.collect do |col|
50 if col.name == 'owner_uuid'
52 elsif [:string, :text].index(col.type)
54 elsif !textonly_operator and [:datetime, :integer].index(col.type)
60 def self.attribute_column attr
61 self.columns.select { |col| col.name == attr.to_s }.first
64 # def eager_load_associations
65 # self.class.columns.each do |col|
66 # re = col.name.match /^(.*)_kind$/
68 # self.respond_to? re[1].to_sym and
69 # (auuid = self.send((re[1] + '_uuid').to_sym)) and
70 # (aclass = self.class.kind_class(self.send(col.name.to_sym))) and
71 # (aobject = aclass.where('uuid=?', auuid).first))
72 # self.instance_variable_set('@'+re[1], aobject)
77 def self.readable_by user
78 uuid_list = [user.uuid, *user.groups_i_can(:read)]
79 sanitized_uuid_list = uuid_list.
80 collect { |uuid| sanitize(uuid) }.join(', ')
82 if self == Link and user
83 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))"
85 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}",
97 def ensure_permission_to_create
98 raise PermissionDeniedError unless permission_to_create
101 def permission_to_create
102 current_user.andand.is_active
105 def ensure_permission_to_update
106 raise PermissionDeniedError unless permission_to_update
109 def permission_to_update
111 logger.warn "Anonymous user tried to update #{self.class.to_s} #{self.uuid_was}"
114 if !current_user.is_active
115 logger.warn "Inactive user #{current_user.uuid} tried to update #{self.class.to_s} #{self.uuid_was}"
118 return true if current_user.is_admin
119 if self.uuid_changed?
120 logger.warn "User #{current_user.uuid} tried to change uuid of #{self.class.to_s} #{self.uuid_was} to #{self.uuid}"
123 if self.owner_uuid_changed?
124 if current_user.uuid == self.owner_uuid or
125 current_user.can? write: self.owner_uuid
126 # current_user is, or has :write permission on, the new owner
128 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}"
132 if current_user.uuid == self.owner_uuid_was or
133 current_user.uuid == self.uuid or
134 current_user.can? write: self.owner_uuid_was
135 # current user is, or has :write permission on, the previous owner
138 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}"
143 def ensure_permission_to_destroy
144 raise PermissionDeniedError unless permission_to_destroy
147 def permission_to_destroy
151 def maybe_update_modified_by_fields
152 update_modified_by_fields if self.changed? or self.new_record?
155 def update_modified_by_fields
156 self.updated_at = Time.now
157 self.owner_uuid ||= current_default_owner if self.respond_to? :owner_uuid=
158 self.modified_at = Time.now
159 self.modified_by_user_uuid = current_user ? current_user.uuid : nil
160 self.modified_by_client_uuid = current_api_client ? current_api_client.uuid : nil
163 def ensure_serialized_attribute_type
164 # Specifying a type in the "serialize" declaration causes rails to
165 # raise an exception if a different data type is retrieved from
166 # the database during load(). The validation preventing such
167 # crash-inducing records from being inserted in the database in
168 # the first place seems to have been left as an exercise to the
170 self.class.serialized_attributes.each do |colname, attr|
172 unless self.attributes[colname].is_a? attr.object_class
173 self.errors.add colname.to_sym, "must be a #{attr.object_class.to_s}"
179 def foreign_key_attributes
180 attributes.keys.select { |a| a.match /_uuid$/ }
183 def skip_uuid_read_permission_check
184 %w(modified_by_client_uuid)
187 def skip_uuid_existence_check
191 def normalize_collection_uuids
192 foreign_key_attributes.each do |attr|
193 attr_value = send attr
194 if attr_value.is_a? String and
195 attr_value.match /^[0-9a-f]{32,}(\+[@\w]+)*$/
197 send "#{attr}=", Collection.normalize_uuid(attr_value)
199 # TODO: abort instead of silently accepting unnormalizable value?
205 @@UUID_REGEX = /^[0-9a-z]{5}-([0-9a-z]{5})-[0-9a-z]{15}$/
207 @@prefixes_hash = nil
208 def self.uuid_prefixes
209 unless @@prefixes_hash
211 ActiveRecord::Base.descendants.reject(&:abstract_class?).each do |k|
212 if k.respond_to?(:uuid_prefix)
213 @@prefixes_hash[k.uuid_prefix] = k
220 def self.uuid_like_pattern
221 "_____-#{uuid_prefix}-_______________"
224 def ensure_valid_uuids
225 specials = [system_user_uuid, 'd41d8cd98f00b204e9800998ecf8427e+0']
227 foreign_key_attributes.each do |attr|
228 if new_record? or send (attr + "_changed?")
229 next if skip_uuid_existence_check.include? attr
230 attr_value = send attr
231 next if specials.include? attr_value
233 if (r = ArvadosModel::resource_class_for_uuid attr_value)
234 unless skip_uuid_read_permission_check.include? attr
235 r = r.readable_by(current_user)
237 if r.where(uuid: attr_value).count == 0
238 errors.add(attr, "'#{attr_value}' not found")
255 def self.readable_by (u)
260 [{:uuid => u[:uuid]}]
264 def self.resource_class_for_uuid(uuid)
265 if uuid.is_a? ArvadosModel
268 unless uuid.is_a? String
271 if uuid.match /^[0-9a-f]{32}(\+[^,]+)*(,[0-9a-f]{32}(\+[^,]+)*)*$/
276 Rails.application.eager_load!
277 uuid.match @@UUID_REGEX do |re|
278 return uuid_prefixes[re[1]] if uuid_prefixes[re[1]]
281 if uuid.match /.+@.+/
290 @old_attributes = logged_attributes
293 def log_change(event_type)
294 log = Log.new(event_type: event_type).fill_object(self)
301 log_change('create') do |log|
302 log.fill_properties('old', nil, nil)
308 log_change('update') do |log|
309 log.fill_properties('old', @old_etag, @old_attributes)
315 log_change('destroy') do |log|
316 log.fill_properties('old', @old_etag, @old_attributes)