**What**
I have created a new method on the cart service which is `addLineItems`, allowing a user to add one or multiple items in an optimized way. Also updated the `generate` method from the line item service which now also accept a object data or a collection of data which. Various places have been optimized and cache support has been added to the price selection strategy.
The overall optimization allows to reach another 9000% improvement in the response time as a median (Creating a cart with 6 items):
| | Min (ms) | Median (ms) | Max (ms) | Median Improvement (%)
|---|:-:|---|---|---|
| Before optimisation | 1200 | 9999 | 12698 | N/A
| After optimisation | 63 | 252 | 500 | 39x
| After re optimisation | 56 | 82 | 399 | 121x
| After including addressed feedback | 65 | 202 | 495 | 49x
FIXES CORE-722
**What**
- when deleting an OE cloned items are deleted, this would fail if there were changes associated with the OE since line items were referenced from the item changes and couldn't be deleted
**How**
- when deleting an order edit also remove it's item changes
Fixes CORE-689
* wait for update to order edit model
* delete line item tests
* create remove method for lineitem with tax lines
* add remove item tests
* split delete allocation tests into two: more and less than total
* remove unused import
* cleanup
* add medusa-js and react endpoints
* pr feedback fixes
* linting
* remove unused relation from query
* remove removed-event and unused imports
* add await
**what**
Support confirm of an order edit:
Upon confirmation, the items of the original order are detached and the items from the order edit are attached to the order.
The order total is recomputed with the correct total which can defer from the paid_total and refundable_amount (based on the paid_total)
**Tests**
- Unit tests medusa-js and medusa-react as well as the core
- Integration test of the confirmation flow which check that the order edit is properly confirmed and can be confirmed idempotently. Also validate the totals and that the order items correspond to the order edit items. Also validate the order totals.
FIXES CORE-498
**What**
- Implement adding a line item to order (edit)
**How**
- _by implementing the following "flow"_
- generate a line item
- computing line item adjustments for that line item
- creating tax lines
- creating a change record
**Testing**
- **_integration tests_**
- check if line item and order item change objects are created (with correct tax lines)
- line item adjustments are generated if
- fixed discount is applied to cart
- percentage discount is applied
- **_unit tests_**
- ensure that methods from Inventory, LineItem, LineItemAdjustment etc. services are called
---
RESOLVES CORE-495
**what**
Support `updateLineItem` which does the following:
- If no item change exist then create a new one and attaches the clone item with the adjustments and tax lines
- if an item change exists then delete/create adjustments and tax lines and update the cloned item quantity
**Tests**
- Unit tests core + client
- integration tests
- When no item change already exists
- When an item change already exists
FIXES CORE-497
**What**
- Improve `retrieveActive` to take into account `(confirmed/canceled/declined)_at`
**Test**
- one more Integration test on that case
FIXES CORE-601
**What**
- Implements the admin create end point
- Service implementation of the create method and the retrieveActive as well as the totals computation
- Improve compute line items
- client
- medusa-js api
- medusa-react mutations hooks
**Tests**
- Unit tests of the create end points
- Unit tests of the service create method
- Integration tests for admin that also take into account totals computations
- client
- medusa-js tests
- medusa-react hooks tests
FIXES CORE-491
**What**
- Implements the admin/store retrieval end point
- Service implementation of the retrieve method
- Service implementation of the computeLineItems method which aggregates the right line item based on the changes that are made
- client
- medusa-js api
- medusa-react queries hooks
**Tests**
- Unit tests of the retrieval end points
- Unit tests of the service retrieve method and computeLineItems
- Integration tests for admin/store
- client
- medusa-js tests
- medusa-react hooks tests
FIXES CORE-492
