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
15 before_validation :maybe_update_modified_by_fields
16 validate :ensure_serialized_attribute_type
17 validate :normalize_collection_uuids
18 validate :ensure_valid_uuids
20 has_many :permissions, :foreign_key => :head_uuid, :class_name => 'Link', :primary_key => :uuid, :conditions => "link_class = 'permission'"
22 class PermissionDeniedError < StandardError
28 class UnauthorizedError < StandardError
34 def self.kind_class(kind)
35 kind.match(/^arvados\#(.+)$/)[1].classify.safe_constantize rescue nil
39 "#{current_api_base}/#{self.class.to_s.pluralize.underscore}/#{self.uuid}"
42 def self.searchable_columns operator
43 textonly_operator = !operator.match(/[<=>]/)
44 self.columns.collect do |col|
45 if col.name == 'owner_uuid'
47 elsif [:string, :text].index(col.type)
49 elsif !textonly_operator and [:datetime, :integer].index(col.type)
55 def self.attribute_column attr
56 self.columns.select { |col| col.name == attr.to_s }.first
59 # def eager_load_associations
60 # self.class.columns.each do |col|
61 # re = col.name.match /^(.*)_kind$/
63 # self.respond_to? re[1].to_sym and
64 # (auuid = self.send((re[1] + '_uuid').to_sym)) and
65 # (aclass = self.class.kind_class(self.send(col.name.to_sym))) and
66 # (aobject = aclass.where('uuid=?', auuid).first))
67 # self.instance_variable_set('@'+re[1], aobject)
72 def self.readable_by user
73 uuid_list = [user.uuid, *user.groups_i_can(:read)]
74 sanitized_uuid_list = uuid_list.
75 collect { |uuid| sanitize(uuid) }.join(', ')
77 if self == Link and user
78 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))"
80 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'").
81 where("?=? OR #{table_name}.owner_uuid in (?) OR #{table_name}.uuid=? OR permissions.head_uuid IS NOT NULL #{or_references_me}",
89 def ensure_permission_to_create
90 raise PermissionDeniedError unless permission_to_create
93 def permission_to_create
94 current_user.andand.is_active
97 def ensure_permission_to_update
98 raise PermissionDeniedError unless permission_to_update
101 def permission_to_update
103 logger.warn "Anonymous user tried to update #{self.class.to_s} #{self.uuid_was}"
106 if !current_user.is_active
107 logger.warn "Inactive user #{current_user.uuid} tried to update #{self.class.to_s} #{self.uuid_was}"
110 return true if current_user.is_admin
111 if self.uuid_changed?
112 logger.warn "User #{current_user.uuid} tried to change uuid of #{self.class.to_s} #{self.uuid_was} to #{self.uuid}"
115 if self.owner_uuid_changed?
116 if current_user.uuid == self.owner_uuid or
117 current_user.can? write: self.owner_uuid
118 # current_user is, or has :write permission on, the new owner
120 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}"
124 if current_user.uuid == self.owner_uuid_was or
125 current_user.uuid == self.uuid or
126 current_user.can? write: self.owner_uuid_was
127 # current user is, or has :write permission on, the previous owner
130 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}"
135 def ensure_permission_to_destroy
136 raise PermissionDeniedError unless permission_to_destroy
139 def permission_to_destroy
143 def maybe_update_modified_by_fields
144 update_modified_by_fields if self.changed? or self.new_record?
147 def update_modified_by_fields
148 self.created_at ||= Time.now
149 self.owner_uuid ||= current_default_owner if self.respond_to? :owner_uuid=
150 self.modified_at = Time.now
151 self.modified_by_user_uuid = current_user ? current_user.uuid : nil
152 self.modified_by_client_uuid = current_api_client ? current_api_client.uuid : nil
155 def ensure_serialized_attribute_type
156 # Specifying a type in the "serialize" declaration causes rails to
157 # raise an exception if a different data type is retrieved from
158 # the database during load(). The validation preventing such
159 # crash-inducing records from being inserted in the database in
160 # the first place seems to have been left as an exercise to the
162 self.class.serialized_attributes.each do |colname, attr|
164 unless self.attributes[colname].is_a? attr.object_class
165 self.errors.add colname.to_sym, "must be a #{attr.object_class.to_s}"
171 def foreign_key_attributes
172 attributes.keys.select { |a| a.match /_uuid$/ }
175 def skip_uuid_read_permission_check
176 %w(modified_by_client_uuid)
179 def normalize_collection_uuids
180 foreign_key_attributes.each do |attr|
181 attr_value = send attr
182 if attr_value.is_a? String and
183 attr_value.match /^[0-9a-f]{32,}(\+[@\w]+)*$/
185 send "#{attr}=", Collection.normalize_uuid(attr_value)
187 # TODO: abort instead of silently accepting unnormalizable value?
193 @@UUID_REGEX = /^[0-9a-z]{5}-([0-9a-z]{5})-[0-9a-z]{15}$/
195 @@prefixes_hash = nil
196 def self.uuid_prefixes
197 unless @@prefixes_hash
199 ActiveRecord::Base.descendants.reject(&:abstract_class?).each do |k|
200 if k.respond_to?(:uuid_prefix)
201 @@prefixes_hash[k.uuid_prefix] = k
208 def self.uuid_like_pattern
209 "_____-#{uuid_prefix}-_______________"
212 def ensure_valid_uuids
213 specials = [system_user_uuid, 'd41d8cd98f00b204e9800998ecf8427e+0']
215 foreign_key_attributes.each do |attr|
217 if new_record? or send (attr + "_changed?")
218 attr_value = send attr
219 r = ArvadosModel::resource_class_for_uuid attr_value if attr_value
220 r = r.readable_by(current_user) if r and not skip_uuid_read_permission_check.include? attr
221 if r and r.where(uuid: attr_value).count == 0 and not specials.include? attr_value
222 errors.add(attr, "'#{attr_value}' not found")
225 rescue Exception => e
226 bt = e.backtrace.join("\n")
227 errors.add(attr, "'#{attr_value}' error '#{e}'\n#{bt}\n")
232 def self.resource_class_for_uuid(uuid)
233 if uuid.is_a? ArvadosModel
236 unless uuid.is_a? String
239 if uuid.match /^[0-9a-f]{32}(\+[^,]+)*(,[0-9a-f]{32}(\+[^,]+)*)*$/
244 Rails.application.eager_load!
245 uuid.match @@UUID_REGEX do |re|
246 return uuid_prefixes[re[1]] if uuid_prefixes[re[1]]