# Bulk update records

{% hint style="warning" %}
Please be sure of your agent type and version and pick the right documentation accordingly.
{% endhint %}

{% tabs %}
{% tab title="Node.js" %}
{% hint style="danger" %}
This is the documentation of the `forest-express-sequelize` and `forest-express-mongoose` Node.js agents that will soon reach end-of-support.

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Please check your agent type and version and read on or switch to the right documentation.
{% endhint %}
{% endtab %}

{% tab title="Ruby on Rails" %}
{% hint style="success" %}
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{% endhint %}
{% endtab %}

{% tab title="Python" %}
{% hint style="danger" %}
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{% hint style="danger" %}
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{% endhint %}
{% endtab %}
{% endtabs %}

## Anonymize users in bulk

As usual, you must declare the action on your collection.

{% code title="forest/users.js" %}

```javascript
// forest/users.js
const Liana = require('forest-express-sequelize');

Liana.collection('users', {
  actions: [
    {
      name: 'Anonymize',
      type: 'single',
    },
  ],
});
```

{% endcode %}

ou can then implement the post action as you need. Here the records are simply updated in bulk through the `sequelize` ORM.

{% code title="routes/users.js" %}

```javascript
// routes/users.js
const express = require('express');
const router = express.Router();
const models = require('../models');
const {
  ensureAuthenticated,
  RecordsGetter,
} = require('forest-express-sequelize');

router.post(
  '/actions/anonymize',
  ensureAuthenticated,
  parseRequestBody,
  async (request, response) => {
    const { query, user } = request;
    const recordsGetter = new RecordsGetter(models.user, user, query);
    const records = await recordsGetter.getAll();

    try {
      await models.user.update(
        {
          firstName: '*** Anonymized First Name ***',
          lastName: '*** Anonymized Last Name ***',
        },
        { where: { id: records.map((record) => record.id) } }
      );
      response.send({ success: 'User(s) anonymized' });
    } catch (e) {
      return response
        .status(400)
        .send({ error: `Failure during user anonymization: ${e.message}` });
    }
  }
);

module.exports = router;
```

{% endcode %}