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
18 has_many :permissions, :foreign_key => :head_uuid, :class_name => 'Link', :primary_key => :uuid, :conditions => "link_class = 'permission'"
20 class PermissionDeniedError < StandardError
26 class UnauthorizedError < StandardError
32 def self.kind_class(kind)
33 kind.match(/^arvados\#(.+?)(_list|List)?$/)[1].pluralize.classify.constantize rescue nil
37 "#{current_api_base}/#{self.class.to_s.pluralize.underscore}/#{self.uuid}"
40 def self.searchable_columns
41 self.columns.collect do |col|
42 if [:string, :text].index(col.type) && col.name != 'owner_uuid'
48 def eager_load_associations
49 self.class.columns.each do |col|
50 re = col.name.match /^(.*)_kind$/
52 self.respond_to? re[1].to_sym and
53 (auuid = self.send((re[1] + '_uuid').to_sym)) and
54 (aclass = self.class.kind_class(self.send(col.name.to_sym))) and
55 (aobject = aclass.where('uuid=?', auuid).first))
56 self.instance_variable_set('@'+re[1], aobject)
61 def self.readable_by user
62 uuid_list = [user.uuid, *user.groups_i_can(:read)]
63 sanitized_uuid_list = uuid_list.
64 collect { |uuid| sanitize(uuid) }.join(', ')
66 if self == Link and user
67 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))"
69 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'").
70 where("?=? OR #{table_name}.owner_uuid in (?) OR #{table_name}.uuid=? OR permissions.head_uuid IS NOT NULL #{or_references_me}",
78 def ensure_permission_to_create
79 raise PermissionDeniedError unless permission_to_create
82 def permission_to_create
83 current_user.andand.is_active
86 def ensure_permission_to_update
87 raise PermissionDeniedError unless permission_to_update
90 def permission_to_update
92 logger.warn "Anonymous user tried to update #{self.class.to_s} #{self.uuid_was}"
95 if !current_user.is_active
96 logger.warn "Inactive user #{current_user.uuid} tried to update #{self.class.to_s} #{self.uuid_was}"
99 return true if current_user.is_admin
100 if self.uuid_changed?
101 logger.warn "User #{current_user.uuid} tried to change uuid of #{self.class.to_s} #{self.uuid_was} to #{self.uuid}"
104 if self.owner_uuid_changed?
105 if current_user.uuid == self.owner_uuid or
106 current_user.can? write: self.owner_uuid
107 # current_user is, or has :write permission on, the new owner
109 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}"
113 if current_user.uuid == self.owner_uuid_was or
114 current_user.uuid == self.uuid or
115 current_user.can? write: self.owner_uuid_was
116 # current user is, or has :write permission on, the previous owner
119 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}"
124 def ensure_permission_to_destroy
125 raise PermissionDeniedError unless permission_to_destroy
128 def permission_to_destroy
132 def maybe_update_modified_by_fields
133 update_modified_by_fields if self.changed?
136 def update_modified_by_fields
137 self.created_at ||= Time.now
138 self.owner_uuid ||= current_default_owner
139 self.modified_at = Time.now
140 self.modified_by_user_uuid = current_user ? current_user.uuid : nil
141 self.modified_by_client_uuid = current_api_client ? current_api_client.uuid : nil
144 def ensure_serialized_attribute_type
145 # Specifying a type in the "serialize" declaration causes rails to
146 # raise an exception if a different data type is retrieved from
147 # the database during load(). The validation preventing such
148 # crash-inducing records from being inserted in the database in
149 # the first place seems to have been left as an exercise to the
151 self.class.serialized_attributes.each do |colname, attr|
153 unless self.attributes[colname].is_a? attr.object_class
154 self.errors.add colname.to_sym, "must be a #{attr.object_class.to_s}"
160 def self.resource_class_for_uuid(uuid)
161 if uuid.is_a? ArvadosModel
164 unless uuid.is_a? String
167 if uuid.match /^[0-9a-f]{32}(\+[^,]+)*(,[0-9a-f]{32}(\+[^,]+)*)*$/
172 Rails.application.eager_load!
173 uuid.match /^[0-9a-z]{5}-([0-9a-z]{5})-[0-9a-z]{15}$/ do |re|
174 ActiveRecord::Base.descendants.reject(&:abstract_class?).each do |k|
175 if k.respond_to?(:uuid_prefix)
176 if k.uuid_prefix == re[1]