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Run async migrations in sequence #90

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Run async migrations in sequence #90

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17 changes: 16 additions & 1 deletion README.md
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Expand Up @@ -205,7 +205,22 @@ Migrations.add({
});
```

For Meteor 2.8+ you can pass async function directly.
Starting from Meteor 2.8+, you can use async functions directly in your migrations:

```js
Migrations.add({
version: 3,
name: 'Add belts to people wearing pants.',
up: async function () {
// Asynchronous migration code
await SomeCollection.updateAsync({ wearsPants: true }, { $set: { hasBelt: true } }, { multi: true });
},
down: async function () {
// Asynchronous rollback code
await SomeCollection.updateAsync({}, { $unset: { hasBelt: true } }, { multi: true });
},
});
```

* Note: You may want to call migration after startup in case your host (such as Heroku) limits the amount of time given for startup
``` javascript
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