备份：修复前完整项目快照 2026-04-19

fix-db-final.js

@@ -0,0 +1,40 @@
+const db = require('./backend/db-sqlite');
+async function fix() {
+  const fixes = [
+    // Purchase requests
+    "ALTER TABLE purchase_requests ADD COLUMN request_date TEXT DEFAULT ''",
+    // Products
+    "ALTER TABLE products ADD COLUMN remark TEXT DEFAULT ''",
+    // Payment plans - make purchase_order_id nullable
+    // Can't alter NOT NULL in SQLite, so we'll handle it in the route
+    // Customers - the is_default might be queried from wrong table
+    // Let's check the actual customers table schema
+  ];
+  
+  for (const sql of fixes) {
+    try { await db.query(sql); console.log('OK:', sql.substring(0, 80)); }
+    catch(e) { 
+      const msg = e.message || '';
+      if (msg.includes('duplicate') || msg.includes('already exists')) {
+        console.log('SKIP:', sql.substring(0, 80));
+      } else {
+        console.log('ERR:', msg.substring(0, 100));
+      }
+    }
+  }
+  
+  // Check customers table schema
+  try {
+    const schema = await db.query("PRAGMA table_info(customers)");
+    console.log('\nCustomers columns:', schema.rows.map(r => r.name).join(', '));
+  } catch(e) { console.log('ERR:', e.message); }
+  
+  // Check payment_plans schema
+  try {
+    const schema = await db.query("PRAGMA table_info(payment_plans)");
+    console.log('Payment plans columns:', schema.rows.map(r => `${r.name}[${r.notnull?'NOT NULL':'NULL'}]`).join(', '));
+  } catch(e) { console.log('ERR:', e.message); }
+  
+  process.exit();
+}
+fix();