Fix database experience (#2263)

server/scripts/truncate-db.ts

@@ -0,0 +1,54 @@
+import { ConfigService } from '@nestjs/config';
+
+import console from 'console';
+
+import { config } from 'dotenv';
+import { DataSource } from 'typeorm';
+
+config();
+
+const configService = new ConfigService();
+
+export const connectionSource = new DataSource({
+  type: 'postgres',
+  logging: false,
+  url: configService.get<string>('PG_DATABASE_URL'),
+});
+
+const performQuery = async (query: string, consoleDescription: string) => {
+  try {
+    await connectionSource.query(query);
+    console.log(`Performed '${consoleDescription}' successfully`);
+  } catch (err) {
+    console.error(`Failed to perform '${consoleDescription}':`, err);
+  }
+};
+
+connectionSource
+  .initialize()
+  .then(async () => {
+    await performQuery(
+      `
+        CREATE OR REPLACE FUNCTION drop_all() RETURNS VOID AS $$
+          DECLARE schema_item RECORD; 
+          BEGIN
+            FOR schema_item IN
+              SELECT subrequest."name" as schema_name
+              FROM  (SELECT n.nspname AS "name"
+              FROM pg_catalog.pg_namespace n
+              WHERE n.nspname !~ '^pg_' AND n.nspname <> 'information_schema') as subrequest
+            LOOP
+              EXECUTE 'DROP SCHEMA ' || schema_item.schema_name || ' CASCADE'; 
+            END LOOP; 
+            RETURN; 
+          END;
+        $$ LANGUAGE plpgsql;
+     
+        SELECT drop_all ();
+      `,
+      'Dropping all schemas...',
+    );
+  })
+  .catch((err) => {
+    console.error('Error during Data Source initialization:', err);
+  });