Re: duplicate key value violates unique constraint"chinese_price_infos_pkey"

Hi,

Thanks for your reply. It is automatic, my app don’t creates ID, it delegates it to the DB. I am using Ruby on Rails
app,where we use Postgresql.  

docking_dev=# \d chinese_price_infos;
                                         Table "public.chinese_price_infos"
   Column    |            Type             | Collation | Nullable |                     Default
-------------+-----------------------------+-----------+----------+-------------------------------------------------
 id          | integer                     |           | not null | nextval('chinese_price_infos_id_seq'::regclass)
 created_at  | timestamp without time zone |           |          |
 updated_at  | timestamp without time zone |           |          |
 item_code   | character varying(255)      |           |          |
 description | character varying(255)      |           |          |
 unit        | character varying(255)      |           |          |
 price_cents | integer                     |           |          |
 uuid        | uuid                        |           |          | uuid_generate_v4()
 company_id  | uuid                        |           |          |
Indexes:
    "chinese_price_infos_pkey" PRIMARY KEY, btree (id)
    "index_chinese_price_infos_on_company_id" btree (company_id)




Thanks,

Arup Rakshit
ar@zeit.io



> On 06-May-2019, at 4:38 PM, Ray O'Donnell <ray@rodonnell.ie> wrote:
>
> On 06/05/2019 12:05, Arup Rakshit wrote:
>> Every time I try to insert I get the error:
>> docking_dev=# INSERT INTO "chinese_price_infos" ("item_code",
>> "price_cents", "unit", "description", "company_id", "created_at",
>> "updated_at") VALUES ('01GS10001', 6000, 'Lift', 'Shore Crane
>> Rental', '9ae3f8b8-8f3f-491c-918a-efd8f5100a5e', '2019-05-06
>> 10:49:03.894725', '2019-05-06 10:49:03.894725'); ERROR:  duplicate
>> key value violates unique constraint "chinese_price_infos_pkey" DETAIL:  Key (id)=(71165) already exists.
docking_dev=#INSERT INTO 
>> "chinese_price_infos" ("item_code", "price_cents", "unit",
>> "description", "company_id", "created_at", "updated_at") VALUES
>> ('01GS10001', 6000, 'Lift', 'Shore Crane Rental',
>> '9ae3f8b8-8f3f-491c-918a-efd8f5100a5e', '2019-05-06 10:49:03.894725',
>> '2019-05-06 10:49:03.894725'); ERROR:  duplicate key value violates
>> unique constraint "chinese_price_infos_pkey" DETAIL:  Key
>> (id)=(71166) already exists.
>> Then I found:
>> docking_dev=# SELECT MAX(id) FROM chinese_price_infos; max -------- 128520 (1 row)
>> docking_dev=# SELECT nextval('chinese_price_infos_id_seq'); nextval --------- 71164 (1 row)
>> Not sure how it is out of sync. How can I fix this permanently. I ran
>> vacuum analyze verbose; still same error.
>
>
> You can fix it by using setval() to set the sequence manually to something higher than the highest current id value
inthe table. However, it sounds as if something in the application code may be causing problems.... For example, is
somethinggenerating id values without reference to the sequence? 
>
> Ray.
>
>
>
> --
> Raymond O'Donnell // Galway // Ireland
> ray@rodonnell.ie