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# Method name: bulkInsert(collectionId: string, items: Array<object>, options: WixDataOptions)

# Method package: wixData

# Method menu location: wixData --> bulkInsert

# Method Link: https://dev.wix.com/docs/velo/apis/wix-data/bulk-insert.md

# Method Description:

Adds a number of items to a collection.

The `bulkInsert()` function returns a Promise that resolves after the items
 have been added to the specified collection.
 The Promise is rejected if the current user does not have "create" permissions
 for the collection. Items are skipped if they include an `_id` property whose
 value matches an existing ID in the collection. Meaning, `bulkInsert()` cannot
 overwrite an existing item in the collection.

 Calling the `bulkInsert()` function triggers the [`beforeInsert()`](wix-data.Hooks.html#beforeInsert)
 and [`afterInsert()`](wix-data.Hooks.html#afterInsert) hooks for each item
 that is inserted if the hooks have been defined.

 Use the `options` parameter to run `bulkInsert()` from backend code without
 checking for permissions or without its registered hooks.

 When inserting items into a collection that has a reference field, set
 the values of the reference fields to the referenced item's `_id` value or
 the entire referenced item object.

 The `bulkInsert()` function adds the following properties and values to the item
 when it adds it to the collection:

 + `_id`: A unique identifier for an item in a collection, if the item doesn't have one or has one that is `undefined`. You can optionally provide your own ID. Once an ID is assigned to an item it cannot be changed.
 + `_createdDate`: The date the item was added to the collection.
 + `_updatedDate`:  The date the item was modified. When the item is first added, the `createdDate` and `updatedDate` are the same.


 Any valid JavaScript object can be added as a property value. The `bulkInsert()`
 function maintains the structure of the specified object. For example,
 objects that contain nested objects, Arrays, or Arrays with nested objects
 are all added to the collection as defined.

The maximum size of an item that you can add to a collection is 500kb.
> **Notes:** 
> - If an item's `_id` property value is set to `null` or an empty string, an error is thrown.
> - Bulk operations are limited to 1000 items per function call.
> - The `bulkInsert()` function is not supported for Single Item Collections.
> - The `bulkInsert()` function does not support multi-reference fields. For multi-reference fields, use [`insertReference()`](https://www.wix.com/velo/reference/wix-data/insertreference). 
> - [Translatable collections](https://support.wix.com/en/article/wix-multilingual-translating-cms-collection-content) do not allow insertion and modification of items when working in a non-primary language. For example, if a collection's primary language is English, and the site visitor is viewing the site in French, calling `bulkInsert()` will fail and issue an error.



# Method Code Examples:

*** Note: do not assume any prop names or enum values other than the ones in the example.

## Insert multiple items into a collection

```javascript
import wixData from 'wix-data';

// ...

let toInsert1 = {
  "title":        "Mr.",
  "first_name":   "John",
  "last_name":    "Doe"
};

let toInsert2 = {
  "title":        "Ms.",
  "first_name":   "Jane",
  "last_name":    "Doe"
};

wixData.bulkInsert("myCollection", [toInsert1, toInsert2])
  .then((results) => {
    let inserted = results.inserted; // 2
    let insertedIds = results.insertedItemIds; // see below
    let updated = results.updated; // 0
    let skipped = results.skipped; // 0
    let errors = results.errors; // []
  })
  .catch((err) => {
    let errorMsg = err;
  });

/*  insertedIds is:
 *
 *  [
 *    "d9ea65a6-726a-4c3e-b97d-1128c0a06b5f",
 *    "472c1da9-e5e4-4620-8ee3-962e9d1a7df5"
 *  ]
 */
```

## Insert multiple items with specified IDs into a collection

```javascript
import wixData from 'wix-data';

// ...

let toInsert1 = {
  "_id":          "00001",
  "title":        "Mr.",
  "first_name":   "John",
  "last_name":    "Doe"
};

let toInsert2 = {
  "_id":          "00002",
  "title":        "Ms.",
  "first_name":   "Jane",
  "last_name":    "Doe"
};

wixData.bulkInsert("myCollection", [toInsert1, toInsert2])
  .then((results) => {
    let inserted = results.inserted; // 2
    let insertedIds = results.insertedItemIds; // ["00001", "00002"]
    let updated = results.updated; // 0
    let skipped = results.skipped; // 0
    let errors = results.errors; // []
  })
  .catch((err) => {
    let errorMsg = err;
  });
```

## Insert multiple items into a collection using data options

```javascript
import wixData from 'wix-data';

// ...

let toInsert1 = {
  "_id":          "00001",
  "title":        "Mr.",
  "first_name":   "John",
  "last_name":    "Doe"
};

let toInsert2 = {
  "_id":          "00002",
  "title":        "Ms.",
  "first_name":   "Jane",
  "last_name":    "Doe"
};

let options = {
  "suppressAuth": true,
  "suppressHooks": true
};

wixData.bulkInsert("myCollection", [toInsert1, toInsert2], options)
  .then((results) => {
    let inserted = results.inserted; // 2
    let insertedIds = results.insertedItemIds; // ["00001", "00002"]
    let updated = results.updated; // 0
    let skipped = results.skipped; // 0
    let errors = results.errors; // []
  })
  .catch((err) => {
    let errorMsg = err;
  });
```

## Insert multiple items including a reference to another item using the referenced item's ID

```javascript
import wixData from 'wix-data';

// ...

let countryId = "id-of-usa-item";

let toInsert1 = {
  "title":        "Mr.",
  "first_name":   "John",
  "last_name":    "Doe",
  "country":      countryId
};

let toInsert2 = {
  "title":        "Ms.",
  "first_name":   "Jane",
  "last_name":    "Doe",
  "country":      countryId
};

wixData.bulkInsert("myCollection", [toInsert1, toInsert2])
  .then((results) => {
    let inserted = results.inserted; // 2
    let insertedIds = results.insertedItemIds; // see below
    let updated = results.updated; // 0
    let skipped = results.skipped; // 0
    let errors = results.errors; // []
  })
  .catch((err) => {
    let errorMsg = err;
  });

/*  insertedIds is:
 *
 *  [
 *    "d9ea65a6-726a-4c3e-b97d-1128c0a06b5f",
 *    "472c1da9-e5e4-4620-8ee3-962e9d1a7df5"
 *  ]
 */
```

## Insert multiple items including a reference to another item using the reference item

```javascript
import wixData from 'wix-data';

// ...

let countryItem = // get country item from somewhere

let toInsert1 = {
  "title":        "Mr.",
  "first_name":   "John",
  "last_name":    "Doe",
  "country":      countryItem
};

let toInsert2 = {
  "title":        "Ms.",
  "first_name":   "Jane",
  "last_name":    "Doe",
  "country":      countryItem
};

wixData.bulkInsert("myCollection", [toInsert1, toInsert2])
  .then((results) => {
    let inserted = results.inserted; // 2
    let insertedIds = results.insertedItemIds; // see below
    let updated = results.updated; // 0
    let skipped = results.skipped; // 0
    let errors = results.errors; // []
  })
  .catch((err) => {
    let errorMsg = err;
  });

/*  insertedIds is:
 *
 *  [
 *    "d9ea65a6-726a-4c3e-b97d-1128c0a06b5f",
 *    "472c1da9-e5e4-4620-8ee3-962e9d1a7df5"
 *  ]
 */
```

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