chore: start research for migration

api/migrations/20240229105707_seeding.down.sql

@@ -0,0 +1,5 @@
+-- Add down migration script here
+TRUNCATE TABLE cost_shares;
+TRUNCATE TABLE costs;
+TRUNCATE TABLE users;
+TRUNCATE TABLE wgs;

api/migrations/20240229105707_seeding.up.sql

@@ -0,0 +1,45 @@
+-- Add up migration script here
+INSERT INTO wgs
+ (id, url, name) VALUES
+ (1, 'lamako', 'LAMAKO WGMBH');
+
+INSERT INTO users
+ (id, name, username, password_hash, revoke_before, wg) VALUES
+ (1, 'Konni', 'kartonrad', '$pbkdf2-sha256$i=10000,l=32$R+UA953d9tO8VFqh8vF7TA$wmDkCKb9ScX6MfPJxKNf4dBM9MMHwEeVCsgzMvkqm48',
+ 'NOW', 1);
+
+INSERT INTO users
+ (id, name, username, password_hash, revoke_before, wg) VALUES
+ (2, 'Laura', 'lamaura', '$pbkdf2-sha256$i=10000,l=32$R+UA953d9tO8VFqh8vF7TA$wmDkCKb9ScX6MfPJxKNf4dBM9MMHwEeVCsgzMvkqm48',
+ 'NOW', 1);
+
+ INSERT INTO users
+ (id, name, username, password_hash, revoke_before, wg) VALUES
+ (3, 'Marie', 'marieee', '$pbkdf2-sha256$i=10000,l=32$R+UA953d9tO8VFqh8vF7TA$wmDkCKb9ScX6MfPJxKNf4dBM9MMHwEeVCsgzMvkqm48',
+ 'NOW', 1);
+
+
+INSERT INTO costs (id, wg_id, name, amount, creditor_id, added_on) VALUES
+(1, 1, 'Apotheke IBU/Tests/Masken', 15.0, 1, 'NOW');
+INSERT INTO cost_shares (cost_id, debtor_id, paid) VALUES
+(1, 1, true);
+INSERT INTO cost_shares (cost_id, debtor_id, paid) VALUES
+(1, 2, false);
+INSERT INTO cost_shares (cost_id, debtor_id, paid) VALUES
+(1, 3, false);
+
+INSERT INTO costs (id, wg_id, name, amount, creditor_id, added_on) VALUES
+(2, 1, 'Einkauf whatever', 22.0, 2, 'NOW');
+INSERT INTO cost_shares (cost_id, debtor_id, paid) VALUES
+(2, 1, false);
+INSERT INTO cost_shares (cost_id, debtor_id, paid) VALUES
+(2, 2, true);
+
+INSERT INTO costs (id, wg_id, name, amount, creditor_id, added_on) VALUES
+(3, 1, 'DM Kirschkernkissen', 9.90, 1, 'NOW');
+INSERT INTO cost_shares (cost_id, debtor_id, paid) VALUES
+(3, 1, true);
+INSERT INTO cost_shares (cost_id, debtor_id, paid) VALUES
+(3, 2, false);
+INSERT INTO cost_shares (cost_id, debtor_id, paid) VALUES
+(3, 3, false);

api/src/sql/costs.sql

@@ -1,3 +1,21 @@
+SELECT  debtor_id, creditor_id, (amount/nr_shares)::NUMERIC(16,2) as owed, paid, id as cost_id , wg_id, equal_balances
+FROM cost_shares
+LEFT JOIN (
+	SELECT
+		costs.id,
+		amount,
+		creditor_id,
+		wg_id,
+		equal_balances,
+		count(*) as nr_shares,
+		sum( CASE WHEN shares.paid = false AND shares.debtor_id != creditor_id THEN 1 ELSE 0 END ) as nr_unpaid_shares
+	FROM costs
+	LEFT JOIN cost_shares as shares ON costs.id = shares.cost_id   --multiple per row
+	GROUP BY costs.id
+) AS cost_agg ON cost_agg.id = cost_shares.cost_id
+
+
+
 --- for GET /costs
 SELECT id, wg_id, name, amount, creditor_id, receit_id, added_on, equal_balances, ROW(my_share.cost_id, my_share.debtor_id, my_share.paid) as my_share,
 	count(*) as nr_shares, sum( CASE WHEN shares.paid = false AND shares.debtor_id != creditor_id THEN 1 ELSE 0 END ) as nr_unpaid_shares