add db schema

db_schema.sql

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+-- Database export via SQLPro (https://www.sqlprostudio.com/)
+-- Exported by camille at 27-01-2025 12:25.
+-- WARNING: This file may contain descructive statements such as DROPs.
+-- Please ensure that you are running the script at the proper location.
+
+
+-- BEGIN TABLE public.instances
+DROP TABLE IF EXISTS public.instances CASCADE;
+BEGIN;
+
+CREATE TABLE IF NOT EXISTS public.instances (
+	id bigint DEFAULT nextval('insances_sampleid_seq'::regclass) NOT NULL,
+	instance character varying NOT NULL,
+	record_update_by bigint,
+	record_updated_at timestamp without time zone,
+	vote integer DEFAULT 1 NOT NULL,
+	PRIMARY KEY(id)
+);
+
+COMMIT;
+
+-- END TABLE public.instances
+
+-- BEGIN TABLE public.receipts
+DROP TABLE IF EXISTS public.receipts CASCADE;
+BEGIN;
+
+CREATE TABLE IF NOT EXISTS public.receipts (
+	id bigint DEFAULT nextval('receipts_sampleid_seq'::regclass) NOT NULL,
+	instance_id bigint NOT NULL,
+	updated_by bigint,
+	updated_at timestamp without time zone,
+	original_link character varying NOT NULL,
+	image_filename character varying,
+	PRIMARY KEY(id)
+);
+
+COMMIT;
+
+-- END TABLE public.receipts
+
+-- BEGIN TABLE public.users
+DROP TABLE IF EXISTS public.users CASCADE;
+BEGIN;
+
+CREATE TABLE IF NOT EXISTS public.users (
+	id bigint DEFAULT nextval('users_sampleid_seq'::regclass) NOT NULL,
+	username character varying NOT NULL,
+	fullname character varying,
+	fedi_address character varying NOT NULL,
+	active boolean DEFAULT true NOT NULL,
+	PRIMARY KEY(id)
+);
+
+COMMIT;
+
+-- END TABLE public.users
+
+ALTER TABLE IF EXISTS public.instances
+	ADD CONSTRAINT instances_users_fk
+	FOREIGN KEY (record_update_by)
+	REFERENCES public.users (id);
+
+ALTER TABLE IF EXISTS public.receipts
+	ADD CONSTRAINT instance_id_fkey
+	FOREIGN KEY (instance_id)
+	REFERENCES public.instances (id)
+	ON DELETE CASCADE;
+
+ALTER TABLE IF EXISTS public.receipts
+	ADD CONSTRAINT update_by_fkey
+	FOREIGN KEY (updated_by)
+	REFERENCES public.users (id);