diff --git a/packages/core/client/src/schema-component/antd/upload/Upload.tsx b/packages/core/client/src/schema-component/antd/upload/Upload.tsx
index 241f73e0df..4ae5cc2da1 100644
--- a/packages/core/client/src/schema-component/antd/upload/Upload.tsx
+++ b/packages/core/client/src/schema-component/antd/upload/Upload.tsx
@@ -389,7 +389,7 @@ export function Uploader({ rules, ...props }: UploadProps) {
           if (pendingFiles.length) {
             setUploadedList(valueList);
           } else {
-            onChange?.([...value, ...valueList]);
+            onChange?.([...(value || []), ...valueList]);
             setUploadedList([]);
           }
         }
diff --git a/packages/plugins/@nocobase/plugin-file-manager/src/client/templates/file.ts b/packages/plugins/@nocobase/plugin-file-manager/src/client/templates/file.ts
index 6b9e36b082..f943aefe38 100644
--- a/packages/plugins/@nocobase/plugin-file-manager/src/client/templates/file.ts
+++ b/packages/plugins/@nocobase/plugin-file-manager/src/client/templates/file.ts
@@ -104,6 +104,7 @@ export class FileCollectionTemplate extends CollectionTemplate {
         type: 'string',
         name: 'url',
         deletable: false,
+        length: 1024,
         uiSchema: {
           type: 'string',
           title: `{{t("URL")}}`,
diff --git a/packages/plugins/@nocobase/plugin-file-manager/src/server/collections/attachments.ts b/packages/plugins/@nocobase/plugin-file-manager/src/server/collections/attachments.ts
index 92cb5308b1..48c88761ab 100644
--- a/packages/plugins/@nocobase/plugin-file-manager/src/server/collections/attachments.ts
+++ b/packages/plugins/@nocobase/plugin-file-manager/src/server/collections/attachments.ts
@@ -70,6 +70,7 @@ export default defineCollection({
       comment: '网络访问地址',
       type: 'string',
       name: 'url',
+      length: 1024,
       // formula: '{{ storage.baseUrl }}{{ path }}/{{ filename }}'
     },
   ],
diff --git a/packages/plugins/@nocobase/plugin-file-manager/src/server/migrations/20250224112112-increase-url-length.ts b/packages/plugins/@nocobase/plugin-file-manager/src/server/migrations/20250224112112-increase-url-length.ts
new file mode 100644
index 0000000000..d21e843f4d
--- /dev/null
+++ b/packages/plugins/@nocobase/plugin-file-manager/src/server/migrations/20250224112112-increase-url-length.ts
@@ -0,0 +1,55 @@
+/**
+ * This file is part of the NocoBase (R) project.
+ * Copyright (c) 2020-2024 NocoBase Co., Ltd.
+ * Authors: NocoBase Team.
+ *
+ * This project is dual-licensed under AGPL-3.0 and NocoBase Commercial License.
+ * For more information, please refer to: https://www.nocobase.com/agreement.
+ */
+
+import { DataTypes } from 'sequelize';
+import { Migration } from '@nocobase/server';
+
+export default class extends Migration {
+  on = 'afterLoad'; // 'beforeLoad' or 'afterLoad'
+  appVersion = '<1.5.14';
+
+  async up() {
+    const queryInterface = this.db.sequelize.getQueryInterface();
+    const CollectionRepo = this.db.getRepository('collections');
+    const FieldRepo = this.db.getRepository('fields');
+    await this.db.sequelize.transaction(async (transaction) => {
+      const collections = await CollectionRepo.find({
+        filter: {
+          'options.template': 'file',
+        },
+        transaction,
+      });
+      collections.push({
+        name: 'attachments',
+      });
+      for (const item of collections) {
+        const collection = this.db.getCollection(item.name) || this.db.collection(item);
+        const tableName = collection.getTableNameWithSchema();
+        await queryInterface.changeColumn(
+          tableName,
+          'url',
+          {
+            type: DataTypes.STRING(1024),
+          },
+          { transaction },
+        );
+        await FieldRepo.update({
+          filter: {
+            collectionName: item.name,
+            name: 'url',
+          },
+          values: {
+            length: 1024,
+          },
+          transaction,
+        });
+      }
+    });
+  }
+}