Re: Function PostgreSQL 9.2

I'm just having some problem when doing:

INSERT INTO public.users
> (id,email,encrypted_password,sign_in_count,created_at,updated_at,company_id)
> VALUES (66,'test22(at)test(dot)com','password','0','2016-05-03
> 00:01:01','2016-05-03 00:01:01','15');

- see that I'm not providing the "code" column value? If I run the query
above, I get the following error:

> ERROR: query returned no rows
> CONTEXT: PL/pgSQL function users_code_seq() line 7 at SQL statement

- If I include the code column with a default value:

> INSERT INTO public.users
> (id,email,encrypted_password,sign_in_count,created_at,updated_at,code,company_id)
> VALUES (4,'test4(at)test(dot)com','password','0','2016-05-03
> 00:01:01','2016-05-03 00:01:01',default,'2');

I get the same error

- Please, if anyone can help with that.. I'd appreciate it.

*The final function code is:*

CREATE OR REPLACE FUNCTION users_code_seq()
> RETURNS "trigger" AS $$
> DECLARE code character varying;
> BEGIN
> IF NEW.code IS NULL THEN
> SELECT client_code_increment INTO STRICT NEW.code FROM
> public.companies WHERE id = NEW.id ORDER BY client_code_increment DESC;
> END IF;
> IF (TG_OP = 'INSERT') THEN
> UPDATE public.companies SET client_code_increment =
> (client_code_increment + 1) WHERE id = NEW.id;
> END IF;
> RETURN NEW;
> END;
> $$ LANGUAGE plpgsql;

*companies.client_code_increment:*

ALTER TABLE public.companies ADD COLUMN client_code_increment integer;
> ALTER TABLE public.companies ALTER COLUMN client_code_increment SET NOT
> NULL;
> ALTER TABLE public.companies ALTER COLUMN client_code_increment SET
> DEFAULT 1000;

*Trigger:*

> CREATE TRIGGER tf_users_code_seq
> BEFORE INSERT
> ON public.users
> FOR EACH ROW
> EXECUTE PROCEDURE users_code_seq();

*Tests I'm doing:*

*1 - Insert data into companies table:*

> INSERT INTO
> public.companies(id,name,created_at,updated_at,client_code_increment)
> VALUES (1,'Company 1','2016-05-03 00:01:01','2016-05-03 00:01:01',default);
> - *PASS*
> INSERT INTO
> public.companies(id,name,created_at,updated_at,client_code_increment)
> VALUES (2,'Company 2','2016-05-03 00:01:01','2016-05-03
> 00:01:01',default); *- PASS*

*2 - insert data into users table:*

> INSERT INTO public.users
> (id,email,encrypted_password,sign_in_count,created_at,updated_at,code,company_id)
> VALUES (1,'test1(at)test(dot)com','password','0','2016-05-03
> 00:01:01','2016-05-03 00:01:01','default','2'); -
> *PASS*INSERT INTO public.users
> (id,email,encrypted_password,sign_in_count,created_at,updated_at,code,company_id)
> VALUES (2,'test2(at)test(dot)com','password','0','2016-05-03
> 00:01:01','2016-05-03 00:01:01',default,'1'); -
> *NO PASS*INSERT INTO public.users
> (id,email,encrypted_password,sign_in_count,created_at,updated_at,code,company_id)
> VALUES (3,'test3(at)test(dot)com','password','0','2016-05-03
> 00:01:01','2016-05-03 00:01:01',default,'2'); - *NO PASS*

Cheers