Added transaction feature, fixed some mistakes

backend/migrations/000005_create_receipts.up.sql

@@ -1,6 +1,25 @@
+CREATE TABLE transactions
+(
+    id          BIGSERIAL PRIMARY KEY,
+    family_id   BIGINT         NOT NULL REFERENCES families (id) ON DELETE CASCADE,
+    description TEXT,
+    type        TEXT           NOT NULL,
+    datetime    TIMESTAMP      NOT NULL,
+    category    TEXT           NOT NULL,
+    amount      NUMERIC(14, 2) NOT NULL,
+    created_at  TIMESTAMP      NOT NULL DEFAULT NOW(),
+    created_by  BIGINT         NOT NULL REFERENCES users (id) ON DELETE RESTRICT
+);
+
+CREATE INDEX idx_transactions_family_id ON transactions (family_id);
+CREATE INDEX idx_transactions_datetime ON transactions (datetime);
+CREATE INDEX idx_transactions_created_by ON transactions (created_by);
+CREATE INDEX idx_transactions_family_datetime ON transactions (family_id, datetime DESC);
+
 CREATE TABLE receipts
 (
     id              BIGSERIAL PRIMARY KEY,
+    transaction_id  BIGINT UNIQUE REFERENCES transactions (id) ON DELETE SET NULL,
     receipt_number  TEXT      NOT NULL UNIQUE,
     ui              TEXT      NOT NULL,
     status          INTEGER   NOT NULL,
@@ -29,7 +48,8 @@ CREATE TABLE receipts
     skno_number     TEXT,
     unp             TEXT,
     success         TEXT,
-    created_at      TIMESTAMP DEFAULT NOW()
+    created_at      TIMESTAMP NOT NULL DEFAULT NOW()
 );
 
-CREATE INDEX idx_receipts_issued_at ON receipts(issued_at);
+CREATE INDEX idx_receipts_issued_at ON receipts (issued_at);
+CREATE INDEX idx_receipts_transaction_id ON receipts (transaction_id);