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)?$/)[1].pluralize.classify.constantize rescue nil
37 "#{current_api_base}/#{self.class.to_s.pluralize.underscore}/#{self.uuid}"
40 def self.searchable_columns
41 self.columns.collect do |col|
42 if [:string, :text].index(col.type) && col.name != 'owner_uuid'
48 # is_searchable returns 'true' if a model is subject to full-text
49 # search through the workbench. Models which are searchable should
55 def eager_load_associations
56 self.class.columns.each do |col|
57 re = col.name.match /^(.*)_kind$/
59 self.respond_to? re[1].to_sym and
60 (auuid = self.send((re[1] + '_uuid').to_sym)) and
61 (aclass = self.class.kind_class(self.send(col.name.to_sym))) and
62 (aobject = aclass.where('uuid=?', auuid).first))
63 self.instance_variable_set('@'+re[1], aobject)
68 def self.readable_by user
69 uuid_list = [user.uuid, *user.groups_i_can(:read)]
70 sanitized_uuid_list = uuid_list.
71 collect { |uuid| sanitize(uuid) }.join(', ')
73 if self == Link and user
74 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))"
76 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'").
77 where("?=? OR #{table_name}.owner_uuid in (?) OR #{table_name}.uuid=? OR permissions.head_uuid IS NOT NULL #{or_references_me}",
85 def ensure_permission_to_create
86 raise PermissionDeniedError unless permission_to_create
89 def permission_to_create
90 current_user.andand.is_active
93 def ensure_permission_to_update
94 raise PermissionDeniedError unless permission_to_update
97 def permission_to_update
99 logger.warn "Anonymous user tried to update #{self.class.to_s} #{self.uuid_was}"
102 if !current_user.is_active
103 logger.warn "Inactive user #{current_user.uuid} tried to update #{self.class.to_s} #{self.uuid_was}"
106 return true if current_user.is_admin
107 if self.uuid_changed?
108 logger.warn "User #{current_user.uuid} tried to change uuid of #{self.class.to_s} #{self.uuid_was} to #{self.uuid}"
111 if self.owner_uuid_changed?
112 if current_user.uuid == self.owner_uuid or
113 current_user.can? write: self.owner_uuid
114 # current_user is, or has :write permission on, the new owner
116 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}"
120 if current_user.uuid == self.owner_uuid_was or
121 current_user.uuid == self.uuid or
122 current_user.can? write: self.owner_uuid_was
123 # current user is, or has :write permission on, the previous owner
126 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}"
131 def ensure_permission_to_destroy
132 raise PermissionDeniedError unless permission_to_destroy
135 def permission_to_destroy
139 def maybe_update_modified_by_fields
140 update_modified_by_fields if self.changed?
143 def update_modified_by_fields
144 self.created_at ||= Time.now
145 self.owner_uuid ||= current_default_owner
146 self.modified_at = Time.now
147 self.modified_by_user_uuid = current_user ? current_user.uuid : nil
148 self.modified_by_client_uuid = current_api_client ? current_api_client.uuid : nil
151 def ensure_serialized_attribute_type
152 # Specifying a type in the "serialize" declaration causes rails to
153 # raise an exception if a different data type is retrieved from
154 # the database during load(). The validation preventing such
155 # crash-inducing records from being inserted in the database in
156 # the first place seems to have been left as an exercise to the
158 self.class.serialized_attributes.each do |colname, attr|
160 unless self.attributes[colname].is_a? attr.object_class
161 self.errors.add colname.to_sym, "must be a #{attr.object_class.to_s}"
167 def self.resource_class_for_uuid(uuid)
168 if uuid.is_a? ArvadosModel
171 unless uuid.is_a? String
174 if uuid.match /^[0-9a-f]{32}(\+[^,]+)*(,[0-9a-f]{32}(\+[^,]+)*)*$/
179 Rails.application.eager_load!
180 uuid.match /^[0-9a-z]{5}-([0-9a-z]{5})-[0-9a-z]{15}$/ do |re|
181 ActiveRecord::Base.descendants.reject(&:abstract_class?).each do |k|
182 if k.respond_to?(:uuid_prefix)
183 if k.uuid_prefix == re[1]