# Class: LineItemService

Provides layer to manipulate line items.

## Hierarchy

- `"medusa-interfaces"`

  ↳ **`LineItemService`**

## Constructors

### constructor

• **new LineItemService**(`__namedParameters`)

#### Parameters

| Name | Type |
| :------ | :------ |
| `__namedParameters` | `InjectedDependencies` |

#### Overrides

BaseService.constructor

#### Defined in

[services/line-item.ts:38](https://github.com/medusajs/medusa/blob/2d3e404f/packages/medusa/src/services/line-item.ts#L38)

## Properties

### cartRepository\_

• `Protected` `Readonly` **cartRepository\_**: typeof `CartRepository`

#### Defined in

[services/line-item.ts:32](https://github.com/medusajs/medusa/blob/2d3e404f/packages/medusa/src/services/line-item.ts#L32)

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### itemTaxLineRepo\_

• `Protected` `Readonly` **itemTaxLineRepo\_**: typeof `LineItemTaxLineRepository`

#### Defined in

[services/line-item.ts:31](https://github.com/medusajs/medusa/blob/2d3e404f/packages/medusa/src/services/line-item.ts#L31)

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### lineItemAdjustmentService\_

• `Protected` `Readonly` **lineItemAdjustmentService\_**: `LineItemAdjustmentService`

#### Defined in

[services/line-item.ts:36](https://github.com/medusajs/medusa/blob/2d3e404f/packages/medusa/src/services/line-item.ts#L36)

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### lineItemRepository\_

• `Protected` `Readonly` **lineItemRepository\_**: typeof `LineItemRepository`

#### Defined in

[services/line-item.ts:30](https://github.com/medusajs/medusa/blob/2d3e404f/packages/medusa/src/services/line-item.ts#L30)

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### manager\_

• `Protected` `Readonly` **manager\_**: `EntityManager`

#### Defined in

[services/line-item.ts:29](https://github.com/medusajs/medusa/blob/2d3e404f/packages/medusa/src/services/line-item.ts#L29)

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### productService\_

• `Protected` `Readonly` **productService\_**: [`ProductService`](ProductService.md)

#### Defined in

[services/line-item.ts:34](https://github.com/medusajs/medusa/blob/2d3e404f/packages/medusa/src/services/line-item.ts#L34)

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### productVariantService\_

• `Protected` `Readonly` **productVariantService\_**: [`ProductVariantService`](ProductVariantService.md)

#### Defined in

[services/line-item.ts:33](https://github.com/medusajs/medusa/blob/2d3e404f/packages/medusa/src/services/line-item.ts#L33)

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### regionService\_

• `Protected` `Readonly` **regionService\_**: [`RegionService`](RegionService.md)

#### Defined in

[services/line-item.ts:35](https://github.com/medusajs/medusa/blob/2d3e404f/packages/medusa/src/services/line-item.ts#L35)

## Methods

### create

▸ **create**(`data`): `Promise`<`LineItem`\>

Create a line item

#### Parameters

| Name | Type | Description |
| :------ | :------ | :------ |
| `data` | `Partial`<`LineItem`\> | the line item object to create |

#### Returns

`Promise`<`LineItem`\>

the created line item

#### Defined in

[services/line-item.ts:261](https://github.com/medusajs/medusa/blob/2d3e404f/packages/medusa/src/services/line-item.ts#L261)

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### createReturnLines

▸ **createReturnLines**(`returnId`, `cartId`): `Promise`<`LineItem`[]\>

Creates return line items for a given cart based on the return items in a
return.

#### Parameters

| Name | Type | Description |
| :------ | :------ | :------ |
| `returnId` | `string` | the id to generate return items from. |
| `cartId` | `string` | the cart to assign the return line items to. |

#### Returns

`Promise`<`LineItem`[]\>

the created line items

#### Defined in

[services/line-item.ts:133](https://github.com/medusajs/medusa/blob/2d3e404f/packages/medusa/src/services/line-item.ts#L133)

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### delete

▸ **delete**(`id`): `Promise`<`undefined` \| `LineItem`\>

Deletes a line item.

#### Parameters

| Name | Type | Description |
| :------ | :------ | :------ |
| `id` | `string` | the id of the line item to delete |

#### Returns

`Promise`<`undefined` \| `LineItem`\>

the result of the delete operation

#### Defined in

[services/line-item.ts:309](https://github.com/medusajs/medusa/blob/2d3e404f/packages/medusa/src/services/line-item.ts#L309)

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### generate

▸ **generate**(`variantId`, `regionId`, `quantity`, `context?`): `Promise`<`LineItem`\>

#### Parameters

| Name | Type |
| :------ | :------ |
| `variantId` | `string` |
| `regionId` | `string` |
| `quantity` | `number` |
| `context` | `Object` |
| `context.cart?` | `Cart` |
| `context.customer_id?` | `string` |
| `context.metadata?` | `Record`<`string`, `unknown`\> |
| `context.unit_price?` | `number` |

#### Returns

`Promise`<`LineItem`\>

#### Defined in

[services/line-item.ts:186](https://github.com/medusajs/medusa/blob/2d3e404f/packages/medusa/src/services/line-item.ts#L186)

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### list

▸ **list**(`selector`, `config?`): `Promise`<`LineItem`[]\>

#### Parameters

| Name | Type | Default value |
| :------ | :------ | :------ |
| `selector` | `any` | `undefined` |
| `config` | `Object` | `undefined` |
| `config.order` | `Object` | `undefined` |
| `config.order.created_at` | `string` | `"DESC"` |
| `config.skip` | `number` | `0` |
| `config.take` | `number` | `50` |

#### Returns

`Promise`<`LineItem`[]\>

#### Defined in

[services/line-item.ts:81](https://github.com/medusajs/medusa/blob/2d3e404f/packages/medusa/src/services/line-item.ts#L81)

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### retrieve

▸ **retrieve**(`id`, `config?`): `Promise`<`LineItem`\>

Retrieves a line item by its id.

#### Parameters

| Name | Type | Description |
| :------ | :------ | :------ |
| `id` | `string` | the id of the line item to retrieve |
| `config` | `Object` | the config to be used at query building |

#### Returns

`Promise`<`LineItem`\>

the line item

#### Defined in

[services/line-item.ts:102](https://github.com/medusajs/medusa/blob/2d3e404f/packages/medusa/src/services/line-item.ts#L102)

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### update

▸ **update**(`id`, `data`): `Promise`<`LineItem`\>

Updates a line item

#### Parameters

| Name | Type | Description |
| :------ | :------ | :------ |
| `id` | `string` | the id of the line item to update |
| `data` | `Partial`<`LineItem`\> | the properties to update on line item |

#### Returns

`Promise`<`LineItem`\>

the update line item

#### Defined in

[services/line-item.ts:280](https://github.com/medusajs/medusa/blob/2d3e404f/packages/medusa/src/services/line-item.ts#L280)

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### withTransaction

▸ **withTransaction**(`transactionManager`): [`LineItemService`](LineItemService.md)

#### Parameters

| Name | Type |
| :------ | :------ |
| `transactionManager` | `EntityManager` |

#### Returns

[`LineItemService`](LineItemService.md)

#### Defined in

[services/line-item.ts:60](https://github.com/medusajs/medusa/blob/2d3e404f/packages/medusa/src/services/line-item.ts#L60)