This behavior is normal. When a record already exists for has_one, it deletes the previously existing record for database consistency ( has_many ) . It is a bit similar to has_and_belongs_to_many
when you have User has_and_belongs_to_many categories. user.categories_ids = [4,5,6] #some array of category ids its deletes all the existing records and replace it with the new ones. Cheers On Mon, Dec 8, 2014 at 2:18 PM, Man Vuong Ha Thanh <[email protected]> wrote: > I have models like this: > > class User < ActiveRecord::Base > has_one :user_preference, dependent: :destroy > end > > > class UserPreference < ActiveRecord::Base > belongs_to :user > end > > It works fine when I call this: > > $ user.create_user_preference > > (0.3ms) BEGIN > User Load (0.9ms) SELECT "users".* FROM "users" WHERE > "users"."deleted_at" IS NULL AND "users"."id" = $1 LIMIT 1 [["id", > "055df158-4b3f-43f0-b73a-0c14e0ba7723"]] > UserPreference Exists (0.7ms) SELECT 1 AS one FROM "user_preferences" > WHERE "user_preferences"."user_id" = > '055df158-4b3f-43f0-b73a-0c14e0ba7723' LIMIT 1 > SQL (0.5ms) INSERT INTO "user_preferences" ("created_at", "updated_at", > "user_id") VALUES ($1, $2, $3) RETURNING "id" [["created_at", "2014-12-08 > 08:45:57.630670"], ["updated_at", "2014-12-08 08:45:57.630670"], > ["user_id", "055df158-4b3f-43f0-b73a-0c14e0ba7723"]] > (1.5ms) COMMIT > (0.2ms) BEGIN > (0.2ms) COMMIT > > But, if I call that method again, it will delete the `profile` record. > > $ user.create_user_preference > > (0.3ms) BEGIN > User Load (0.8ms) SELECT "users".* FROM "users" WHERE "users". > "deleted_at" IS NULL AND "users"."id" = $1 LIMIT 1 [["id", > "055df158-4b3f-43f0-b73a-0c14e0ba7723"]] > UserPreference Exists (0.7ms) SELECT 1 AS one FROM "user_preferences" > WHERE "user_preferences"."user_id" = > '055df158-4b3f-43f0-b73a-0c14e0ba7723' LIMIT 1 > (0.3ms) ROLLBACK > (0.2ms) BEGIN > SQL (0.4ms) DELETE FROM "user_preferences" WHERE "user_preferences". > "id" = $1 [["id", "9eb6cabd-7c50-4f2b-8562-1159e1c2f4b4"]] > (37.0ms) COMMIT > > It looks weird for me. Is it a normal behaviour, or am I doing something > wrong?? > > -- > You received this message because you are subscribed to the Google Groups > "Ruby on Rails: Talk" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To post to this group, send email to [email protected]. > To view this discussion on the web visit > https://groups.google.com/d/msgid/rubyonrails-talk/59a5e1ac-8aba-492d-9cb2-da27819966e5%40googlegroups.com > <https://groups.google.com/d/msgid/rubyonrails-talk/59a5e1ac-8aba-492d-9cb2-da27819966e5%40googlegroups.com?utm_medium=email&utm_source=footer> > . > For more options, visit https://groups.google.com/d/optout. > -- You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/rubyonrails-talk/CAFKVRj9yWo0KBe%2BCRN5G2Zjn2T_jnW%3DtxBeeit0d%2BDhsP-t1Rg%40mail.gmail.com. For more options, visit https://groups.google.com/d/optout.
