So here's is what I did:
Select the user:
>> user = User.find(337633)
User Load (1.0ms) SELECT "users".* FROM "users" WHERE "users"."id" = $1 LIMIT $2 [["id", 337633], ["LIMIT", 1]]
#<User id: 337633, name: "Restaurant Guy", email: "restaurant@guy.com", mobile: "8000088888", image: "", password_digest: "$2a$10$H3TlQT1DdGOPQjSR7b1st.SVvAg5XiFidrfqzyqz0RW...", created_at: "2017-02-23 18:19:29", updated_at: "2017-02-23 18:21:43", uid: nil, provider: nil, verified_at: nil, location_id: nil>
Check number of roles:
>> user.roles.length
Role Load (1.0ms) SELECT "roles".* FROM "roles" INNER JOIN "users_roles" ON "roles"."id" = "users_roles"."role_id" WHERE "users_roles"."user_id" = $1 [["user_id", 337633]]
1 #customer role
Grant the selected user a role on a specific resource:
>> user.grant :restaurant_admin, Restaurant.first
Restaurant Load (1.0ms) SELECT "restaurants".* FROM "restaurants" ORDER BY "restaurants"."id" ASC LIMIT $1 [["LIMIT", 1]]
Role Load (0.0ms) SELECT "roles".* FROM "roles" WHERE "roles"."name" = $1 AND "roles"."resource_type" = $2 AND "roles"."resource_id" = $3 ORDER BY "roles"."id" ASC LIMIT $4 [["name", "restaurant_admin"], ["resource_type", "Restaurant"], ["resource_id", 1], ["LIMIT", 1]]
(1.0ms) BEGIN
(0.0ms) ROLLBACK
HABTM_Roles Load (0.0ms) SELECT "users_roles".* FROM "users_roles" WHERE "users_roles"."user_id" = $1 [["user_id", 337633]]
Role Load (0.0ms) SELECT "roles".* FROM "roles" WHERE "roles"."id" = $1 LIMIT $2 [["id", 4], ["LIMIT", 1]]
#<Role id: nil, name: "restaurant_admin", resource_type: "Restaurant", resource_id: 1, created_at: nil, updated_at: nil>
Role Load (0.0ms) SELECT "roles".* FROM "roles" WHERE "roles"."id" = 4
>> user.save
(0.0ms) BEGIN
true
User Exists (1.0ms) SELECT 1 AS one FROM "users" WHERE "users"."mobile" = $1 AND ("users"."id" != $2) LIMIT $3 [["mobile", "8000088888"], ["id", 337633], ["LIMIT", 1]]
User Exists (1.0ms) SELECT 1 AS one FROM "users" WHERE "users"."email" = $1 AND ("users"."id" != $2) LIMIT $3 [["email", "restaurant@guy.com"], ["id", 337633], ["LIMIT", 1]]
(1.0ms) COMMIT
And save it:
>> user.save
(0.0ms) BEGIN
true
User Exists (1.0ms) SELECT 1 AS one FROM "users" WHERE "users"."mobile" = $1 AND ("users"."id" != $2) LIMIT $3 [["mobile", "8000088888"], ["id", 337633], ["LIMIT", 1]]
User Exists (1.0ms) SELECT 1 AS one FROM "users" WHERE "users"."email" = $1 AND ("users"."id" != $2) LIMIT $3 [["email", "restaurant@guy.com"], ["id", 337633], ["LIMIT", 1]]
(1.0ms) COMMIT
Reload from database:
>> reload!
Reloading...
true
Check if the saved value is present
>> user = User.find(337633)
User Load (1.0ms) SELECT "users".* FROM "users" WHERE "users"."id" = $1 LIMIT $2 [["id", 337633], ["LIMIT", 1]]
#<User id: 337633, name: "Restaurant Guy", email: "restaurant@guy.com", mobile: "8000088888", image: "", password_digest: "$2a$10$H3TlQT1DdGOPQjSR7b1st.SVvAg5XiFidrfqzyqz0RW...", created_at: "2017-02-23 18:19:29", updated_at: "2017-02-23 18:21:43", uid: nil, provider: nil, verified_at: nil, location_id: nil>
>> user.roles.length
Role Load (0.0ms) SELECT "roles".* FROM "roles" INNER JOIN "users_roles" ON "roles"."id" = "users_roles"."role_id" WHERE "users_roles"."user_id" = $1 [["user_id", 337633]]
1 #customer role :(
Why wasn't the update persisted?
What am I doing wrong?
UPDATE: Looks like there's no mistake on saving the updated parts but seems to be a bug in rolify gem when operated on Rails 5+
UPDATE 2: The aforementioned bug was resolved I believe, and I finally found what was causing the ROLLBACK -> failing to include resourcify.
Need to include resourcify on the resource that should be assigned to the role and the ROLLBACK was happening as the link was broken.
And I also found that user.save is useless here as the roles get into the db right after you grant them