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 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'").
86 where("?=? OR #{table_name}.owner_uuid in (?) OR #{table_name}.uuid=? OR permissions.head_uuid IS NOT NULL #{or_references_me}",
98 def ensure_permission_to_create
99 raise PermissionDeniedError unless permission_to_create
102 def permission_to_create
103 current_user.andand.is_active
106 def ensure_permission_to_update
107 raise PermissionDeniedError unless permission_to_update
110 def permission_to_update
112 logger.warn "Anonymous user tried to update #{self.class.to_s} #{self.uuid_was}"
115 if !current_user.is_active
116 logger.warn "Inactive user #{current_user.uuid} tried to update #{self.class.to_s} #{self.uuid_was}"
119 return true if current_user.is_admin
120 if self.uuid_changed?
121 logger.warn "User #{current_user.uuid} tried to change uuid of #{self.class.to_s} #{self.uuid_was} to #{self.uuid}"
124 if self.owner_uuid_changed?
125 if current_user.uuid == self.owner_uuid or
126 current_user.can? write: self.owner_uuid
127 # current_user is, or has :write permission on, the new owner
129 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}"
133 if current_user.uuid == self.owner_uuid_was or
134 current_user.uuid == self.uuid or
135 current_user.can? write: self.owner_uuid_was
136 # current user is, or has :write permission on, the previous owner
139 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}"
144 def ensure_permission_to_destroy
145 raise PermissionDeniedError unless permission_to_destroy
148 def permission_to_destroy
152 def maybe_update_modified_by_fields
153 update_modified_by_fields if self.changed? or self.new_record?
156 def update_modified_by_fields
157 self.created_at ||= Time.now
158 self.owner_uuid ||= current_default_owner if self.respond_to? :owner_uuid=
159 self.modified_at = Time.now
160 self.modified_by_user_uuid = current_user ? current_user.uuid : nil
161 self.modified_by_client_uuid = current_api_client ? current_api_client.uuid : nil
164 def ensure_serialized_attribute_type
165 # Specifying a type in the "serialize" declaration causes rails to
166 # raise an exception if a different data type is retrieved from
167 # the database during load(). The validation preventing such
168 # crash-inducing records from being inserted in the database in
169 # the first place seems to have been left as an exercise to the
171 self.class.serialized_attributes.each do |colname, attr|
173 unless self.attributes[colname].is_a? attr.object_class
174 self.errors.add colname.to_sym, "must be a #{attr.object_class.to_s}"
180 def foreign_key_attributes
181 attributes.keys.select { |a| a.match /_uuid$/ }
184 def skip_uuid_read_permission_check
185 %w(modified_by_client_uuid)
188 def normalize_collection_uuids
189 foreign_key_attributes.each do |attr|
190 attr_value = send attr
191 if attr_value.is_a? String and
192 attr_value.match /^[0-9a-f]{32,}(\+[@\w]+)*$/
194 send "#{attr}=", Collection.normalize_uuid(attr_value)
196 # TODO: abort instead of silently accepting unnormalizable value?
202 @@UUID_REGEX = /^[0-9a-z]{5}-([0-9a-z]{5})-[0-9a-z]{15}$/
204 @@prefixes_hash = nil
205 def self.uuid_prefixes
206 unless @@prefixes_hash
208 ActiveRecord::Base.descendants.reject(&:abstract_class?).each do |k|
209 if k.respond_to?(:uuid_prefix)
210 @@prefixes_hash[k.uuid_prefix] = k
217 def self.uuid_like_pattern
218 "_____-#{uuid_prefix}-_______________"
221 def ensure_valid_uuids
222 specials = [system_user_uuid, 'd41d8cd98f00b204e9800998ecf8427e+0']
224 foreign_key_attributes.each do |attr|
226 if new_record? or send (attr + "_changed?")
227 attr_value = send attr
228 r = ArvadosModel::resource_class_for_uuid attr_value if attr_value
229 r = r.readable_by(current_user) if r and not skip_uuid_read_permission_check.include? attr
230 if r and r.where(uuid: attr_value).count == 0 and not specials.include? attr_value
231 errors.add(attr, "'#{attr_value}' not found")
234 rescue Exception => e
235 bt = e.backtrace.join("\n")
236 errors.add(attr, "'#{attr_value}' error '#{e}'\n#{bt}\n")
250 def self.readable_by (u)
255 [{:uuid => u[:uuid]}]
259 def self.resource_class_for_uuid(uuid)
260 if uuid.is_a? ArvadosModel
263 unless uuid.is_a? String
266 if uuid.match /^[0-9a-f]{32}(\+[^,]+)*(,[0-9a-f]{32}(\+[^,]+)*)*$/
271 Rails.application.eager_load!
272 uuid.match @@UUID_REGEX do |re|
273 return uuid_prefixes[re[1]] if uuid_prefixes[re[1]]
276 if uuid.match /.+@.+/
285 @old_attributes = logged_attributes
288 def log_change(event_type)
289 log = Log.new(event_type: event_type).fill_object(self)
296 log_change('create') do |log|
297 log.fill_properties('old', nil, nil)
303 log_change('update') do |log|
304 log.fill_properties('old', @old_etag, @old_attributes)
310 log_change('destroy') do |log|
311 log.fill_properties('old', @old_etag, @old_attributes)