When user hits the '+' but it open popup modal where user will select Order values. There is another "+" button on the same lightning. When click on '+' which is displayed on popup box, user will be able to create a new row where user will selects the product name, automatically its description and unit price gets populated.
Usage
Each product item is associated with a product and a location in Salesforce. If a product is stored at multiple locations, the product will be tracked in a different product item for each location.
Associated Objects
This object has the following associated objects. If the API version isn’t specified, they’re available in the same API versions as this object. Otherwise, they’re available in the specified API version and later.
Usage
The Status field specifies the current state of an order. Status strings represent its current state ( Draft or Activated ).
Orders Without Price Books
If your organization manages products and Price books in an external platform, you can use Salesforce API to create orders and order items without values for their Price book and Price book entry fields.
Associated Objects
This object has the following associated objects. Unless noted, they are available in the same API version as this object.