X-Git-Url: https://git.arvados.org/arvados.git/blobdiff_plain/7bc292b326db211a167fad7d74dc2fe548987f7d..ba34a22d9918ae97306472c04701e69090821c82:/services/api/app/models/arvados_model.rb

diff --git a/services/api/app/models/arvados_model.rb b/services/api/app/models/arvados_model.rb
index 6deab8952f..1ff46c3616 100644
--- a/services/api/app/models/arvados_model.rb
+++ b/services/api/app/models/arvados_model.rb
@@ -220,7 +220,7 @@ class ArvadosModel < ApplicationRecord
   end
 
   def self.default_orders
-    ["#{table_name}.modified_at desc", "#{table_name}.uuid"]
+    ["#{table_name}.modified_at desc", "#{table_name}.uuid desc"]
   end
 
   def self.unique_columns
@@ -249,9 +249,9 @@ class ArvadosModel < ApplicationRecord
     # Return [] if this is a frozen project and the current user can't
     # unfreeze
     return [] if respond_to?(:frozen_by_uuid) && frozen_by_uuid &&
-                 !(Rails.configuration.API.UnfreezeProjectRequiresAdmin ?
-                     current_user.andand.is_admin :
-                     current_user.can?(manage: uuid))
+                 (Rails.configuration.API.UnfreezeProjectRequiresAdmin ?
+                    !current_user.andand.is_admin :
+                    !current_user.can?(manage: uuid))
     # Return [] if nobody can write because this object is inside a
     # frozen project
     return [] if FrozenGroup.where(uuid: owner_uuid).any?
@@ -273,6 +273,26 @@ class ArvadosModel < ApplicationRecord
     end.compact.uniq
   end
 
+  def can_write
+    if respond_to?(:frozen_by_uuid) && frozen_by_uuid
+      # This special case is needed to return the correct value from a
+      # "freeze project" API, during which writable status changes
+      # from true to false.
+      #
+      # current_user.can?(write: self) returns true (which is correct
+      # in the context of permission-checking hooks) but the can_write
+      # value we're returning to the caller here represents the state
+      # _after_ the update, i.e., false.
+      return false
+    else
+      return current_user.can?(write: self)
+    end
+  end
+
+  def can_manage
+    return current_user.can?(manage: self)
+  end
+
   # Return a query with read permissions restricted to the union of the
   # permissions of the members of users_list, i.e. if something is readable by
   # any user in users_list, it will be readable in the query returned by this
@@ -458,12 +478,11 @@ class ArvadosModel < ApplicationRecord
       conn.exec_query 'SAVEPOINT save_with_unique_name'
       begin
         save!
+        conn.exec_query 'RELEASE SAVEPOINT save_with_unique_name'
       rescue ActiveRecord::RecordNotUnique => rn
         raise if max_retries == 0
         max_retries -= 1
 
-        conn.exec_query 'ROLLBACK TO SAVEPOINT save_with_unique_name'
-
         # Dig into the error to determine if it is specifically calling out a
         # (owner_uuid, name) uniqueness violation.  In this specific case, and
         # the client requested a unique name with ensure_unique_name==true,
@@ -481,6 +500,8 @@ class ArvadosModel < ApplicationRecord
         detail = err.result.error_field(PG::Result::PG_DIAG_MESSAGE_DETAIL)
         raise unless /^Key \(owner_uuid, name\)=\([a-z0-9]{5}-[a-z0-9]{5}-[a-z0-9]{15}, .*?\) already exists\./.match detail
 
+        conn.exec_query 'ROLLBACK TO SAVEPOINT save_with_unique_name'
+
         new_name = "#{name_was} (#{db_current_time.utc.iso8601(3)})"
         if new_name == name
           # If the database is fast enough to do two attempts in the
@@ -498,10 +519,8 @@ class ArvadosModel < ApplicationRecord
             self[:current_version_uuid] = nil
           end
         end
-        conn.exec_query 'SAVEPOINT save_with_unique_name'
+
         retry
-      ensure
-        conn.exec_query 'RELEASE SAVEPOINT save_with_unique_name'
       end
     end
   end
@@ -656,7 +675,7 @@ class ArvadosModel < ApplicationRecord
       # itself. (If we're in the act of unfreezing, we only need
       # :unfreeze permission, which means "what write permission would
       # be if target weren't frozen")
-      unless ((respond_to?(:frozen_by_uuid) && frozen_by_uuid_in_database && !frozen_by_uuid) ?
+      unless ((respond_to?(:frozen_by_uuid) && frozen_by_uuid_was && !frozen_by_uuid) ?
                 current_user.can?(unfreeze: uuid) :
                 current_user.can?(write: uuid))
         logger.warn "User #{current_user.uuid} tried to modify #{self.class.to_s} #{self.uuid} without write permission"
@@ -931,6 +950,10 @@ class ArvadosModel < ApplicationRecord
   # value in the database to an implicit zero/false value in an update
   # request.
   def fill_container_defaults
+    # Make sure this is correctly sorted by key, because we merge in
+    # whatever is in the database on top of it, this will be the order
+    # that gets used downstream rather than the order the keys appear
+    # in the database.
     self.runtime_constraints = {
       'API' => false,
       'cuda' => {
@@ -938,6 +961,7 @@ class ArvadosModel < ApplicationRecord
         'driver_version' => '',
         'hardware_capability' => '',
       },
+      'keep_cache_disk' => 0,
       'keep_cache_ram' => 0,
       'ram' => 0,
       'vcpus' => 0,