t.string :user_uuid
t.string :target_uuid
t.integer :perm_level
- t.string :target_owner_uuid
- t.integer :trashed
+ t.boolean :traverse_owned
end
-
- ActiveRecord::Base.connection.execute %{
-create or replace function compute_permission_table ()
-returns table(user_uuid character varying (27),
- target_uuid character varying (27),
- perm_level smallint,
- target_owner_uuid character varying(27),
- trashed smallint)
-VOLATILE
-language SQL
-as $$
- WITH RECURSIVE perm_value(name, val) AS (
- VALUES ('can_read'::text,(1)::smallint), ('can_login'::text,1), ('can_write'::text,2), ('can_manage'::text,3)
- ), perm_edges(tail_uuid, head_uuid, val, follow, trashed) AS (
- SELECT links.tail_uuid,
- links.head_uuid,
- pv.val,
- ((pv.val = 3) OR (groups.uuid IS NOT NULL)) AS follow,
- (0)::smallint AS trashed,
- (0)::smallint AS followtrash
- FROM ((public.links
- LEFT JOIN perm_value pv ON ((pv.name = (links.name)::text)))
- LEFT JOIN public.groups ON (((pv.val < 3) AND ((groups.uuid)::text = (links.head_uuid)::text))))
- WHERE ((links.link_class)::text = 'permission'::text)
- UNION ALL
- SELECT groups.owner_uuid,
- groups.uuid,
- 3,
- true AS bool,
- CASE
- WHEN ((groups.trash_at IS NOT NULL) AND (groups.trash_at < clock_timestamp())) THEN 1
- ELSE 0
- END AS "case",
- 1
- FROM public.groups
- ), perm(val, follow, user_uuid, target_uuid, trashed) AS (
- SELECT (3)::smallint AS val,
- true AS follow,
- (users.uuid)::character varying(32) AS user_uuid,
- (users.uuid)::character varying(32) AS target_uuid,
- (0)::smallint AS trashed
- FROM public.users
- UNION
- SELECT (LEAST((perm_1.val)::integer, edges.val))::smallint AS val,
- edges.follow,
- perm_1.user_uuid,
- (edges.head_uuid)::character varying(32) AS target_uuid,
- ((GREATEST((perm_1.trashed)::integer, edges.trashed) * edges.followtrash))::smallint AS trashed
- FROM (perm perm_1
- JOIN perm_edges edges ON ((perm_1.follow AND ((edges.tail_uuid)::text = (perm_1.target_uuid)::text))))
- )
- SELECT perm.user_uuid,
- perm.target_uuid,
- max(perm.val) AS perm_level,
- CASE perm.follow
- WHEN true THEN perm.target_uuid
- ELSE NULL::character varying
- END AS target_owner_uuid,
- max(perm.trashed) AS trashed
- FROM perm
- GROUP BY perm.user_uuid, perm.target_uuid,
- CASE perm.follow
- WHEN true THEN perm.target_uuid
- ELSE NULL::character varying
- END
-$$;
-}
+ add_index :materialized_permissions, [:user_uuid, :target_uuid], unique: true, name: 'permission_user_target'
ActiveRecord::Base.connection.execute %{
create or replace function project_subtree (starting_uuid varchar(27))
language SQL
as $$
WITH RECURSIVE
- project_subtree(uuid) as (
- values (starting_uuid)
- union
- select groups.uuid from groups join project_subtree on (groups.owner_uuid = project_subtree.uuid)
- )
- select uuid from project_subtree;
+ project_subtree(uuid) as (
+ values (starting_uuid)
+ union
+ select groups.uuid from groups join project_subtree on (groups.owner_uuid = project_subtree.uuid)
+ )
+ select uuid from project_subtree;
$$;
}
ActiveRecord::Base.connection.execute %{
-create or replace function project_subtree_notrash (starting_uuid varchar(27))
-returns table (target_uuid varchar(27))
+create or replace function project_subtree_with_trash_at (starting_uuid varchar(27), starting_trash_at timestamp)
+returns table (target_uuid varchar(27), trash_at timestamp)
STABLE
language SQL
as $$
WITH RECURSIVE
- project_subtree(uuid) as (
- values (starting_uuid)
- union
- select groups.uuid from groups join project_subtree on (groups.owner_uuid = project_subtree.uuid)
- where groups.is_trashed=false
- )
- select uuid from project_subtree;
+ project_subtree(uuid, trash_at) as (
+ values (starting_uuid, starting_trash_at)
+ union
+ select groups.uuid, LEAST(project_subtree.trash_at, groups.trash_at)
+ from groups join project_subtree on (groups.owner_uuid = project_subtree.uuid)
+ )
+ select uuid, trash_at from project_subtree;
$$;
}
create_table :trashed_groups, :id => false do |t|
- t.string :uuid
+ t.string :group_uuid
+ t.datetime :trash_at
end
+ add_index :trashed_groups, :group_uuid, :unique => true
ActiveRecord::Base.connection.execute %{
create or replace function compute_trashed ()
-returns table (uuid varchar(27))
+returns table (uuid varchar(27), trash_at timestamp)
STABLE
language SQL
as $$
-select ps.target_uuid from groups,
- lateral project_subtree(groups.uuid) ps
- where groups.is_trashed = true
+select ps.target_uuid as group_uuid, ps.trash_at from groups,
+ lateral project_subtree_with_trash_at(groups.uuid, groups.trash_at) ps
+ where groups.owner_uuid like '_____-tpzed-_______________'
$$;
}
+ ActiveRecord::Base.connection.execute("INSERT INTO trashed_groups select * from compute_trashed()")
+
+ # Get a set of permission by searching the graph and following
+ # ownership and permission links.
+ #
+ # edges() - a subselect with the union of ownership and permission links
+ #
+ # traverse_graph() - recursive query, from the starting node,
+ # self-join with edges to find outgoing permissions.
+ # Re-runs the query on new rows until there are no more results.
+ # This accomplishes a breadth-first search of the permission graph.
+ #
+ ActiveRecord::Base.connection.execute %{
+create or replace function search_permission_graph (starting_uuid varchar(27),
+ starting_perm integer)
+ returns table (target_uuid varchar(27), val integer, traverse_owned bool)
+STABLE
+language SQL
+as $$
+WITH RECURSIVE edges(tail_uuid, head_uuid, val) as (
+ select groups.owner_uuid, groups.uuid, (3) from groups
+ union
+ select links.tail_uuid,
+ links.head_uuid,
+ CASE
+ WHEN links.name = 'can_read' THEN 1
+ WHEN links.name = 'can_login' THEN 1
+ WHEN links.name = 'can_write' THEN 2
+ WHEN links.name = 'can_manage' THEN 3
+ END as val
+ from links
+ where links.link_class='permission'
+ ),
+ traverse_graph(target_uuid, val, traverse_owned) as (
+ values (starting_uuid, starting_perm,
+ (starting_uuid like '_____-j7d0g-_______________' or
+ (starting_uuid like '_____-tpzed-_______________' and starting_perm >= 3)))
+ union
+ (select edges.head_uuid,
+ least(edges.val, traverse_graph.val),
+ (edges.head_uuid like '_____-j7d0g-_______________' or
+ (edges.head_uuid like '_____-tpzed-_______________' and edges.val >= 3))
+ from edges
+ join traverse_graph on (traverse_graph.target_uuid = edges.tail_uuid)
+ where traverse_graph.traverse_owned))
+ select target_uuid, max(val), bool_or(traverse_owned) from traverse_graph
+ group by (target_uuid) ;
+$$;
+}
+
+ ActiveRecord::Base.connection.execute %{
+create or replace function compute_permission_subgraph (perm_origin_uuid varchar(27),
+ starting_uuid varchar(27),
+ starting_perm integer)
+returns table (user_uuid varchar(27), target_uuid varchar(27), val integer, traverse_owned bool)
+STABLE
+language SQL
+as $$
+with
+perm_from_start(perm_origin_uuid, target_uuid, val, traverse_owned) as (
+ select perm_origin_uuid, target_uuid, val, traverse_owned
+ from search_permission_graph(starting_uuid, starting_perm)),
+
+ link_perms(perm_origin_uuid, target_uuid, val, traverse_owned) as (
+ select links.tail_uuid as perm_origin_uuid, ps.target_uuid, ps.val, true
+ from links, lateral search_permission_graph(links.head_uuid,
+ CASE
+ WHEN links.name = 'can_read' THEN 1
+ WHEN links.name = 'can_login' THEN 1
+ WHEN links.name = 'can_write' THEN 2
+ WHEN links.name = 'can_manage' THEN 3
+ END) as ps
+ where links.link_class='permission' and
+ (not (links.tail_uuid = perm_origin_uuid and links.head_uuid = starting_uuid)) and
+ links.tail_uuid not in (select target_uuid from perm_from_start where traverse_owned) and
+ links.head_uuid in (select target_uuid from perm_from_start)),
+
+ user_perms(perm_origin_uuid, target_uuid, val, traverse_owned) as (
+ select x.target_uuid as perm_origin_uuid, y.target_uuid, y.val, y.traverse_owned
+ from (select * from perm_from_start union select * from link_perms) as x,
+ lateral search_permission_graph(x.target_uuid, 3) as y
+ where x.target_uuid like '_____-tpzed-_______________'
+ ),
+
+ all_perms(perm_origin_uuid, target_uuid, val, traverse_owned) as (
+ select * from perm_from_start
+ union
+ select * from link_perms
+ union
+ select * from user_perms
+ )
+
+ select v.user_uuid, v.target_uuid, max(v.perm_level), bool_or(v.traverse_owned) from
+ (select materialized_permissions.user_uuid,
+ u.target_uuid,
+ least(u.val, materialized_permissions.perm_level) as perm_level,
+ u.traverse_owned
+ from all_perms as u
+ join materialized_permissions on (u.perm_origin_uuid = materialized_permissions.target_uuid)
+ where materialized_permissions.traverse_owned
+ union
+ select perm_origin_uuid as user_uuid, target_uuid, val as perm_level, traverse_owned
+ from all_perms
+ where perm_origin_uuid like '_____-tpzed-_______________') as v
+ group by v.user_uuid, v.target_uuid
+$$;
+ }
+
ActiveRecord::Base.connection.execute "DROP MATERIALIZED VIEW IF EXISTS materialized_permission_view;"
end
def down
drop_table :materialized_permissions
drop_table :trashed_groups
+
+ ActiveRecord::Base.connection.execute "DROP function project_subtree (varchar);"
+ ActiveRecord::Base.connection.execute "DROP function project_subtree_with_trash_at (varchar, timestamp);"
+ ActiveRecord::Base.connection.execute "DROP function compute_trashed ();"
+ ActiveRecord::Base.connection.execute "DROP function search_permission_graph(varchar, integer);"
+ ActiveRecord::Base.connection.execute "DROP function compute_permission_subgraph (varchar, varchar, integer);"
end
end
projects / arvados.git / blobdiff