Line Items constitute the second part of the double entry after transactions establish the first part. A transaction can have multiple line items each with a different account, vat and amount.
entity_id: The Id of the Entity object associated with the line item. Defaults to the entity of the logged in user.vat_id: The Id of the Vat object associated with the line item.transaction_id: The Id of the Transaction object associated with the line item. Defaults to null.account_id: The Id of the account associated with the line item.vat_account_id: If the rate of the Vat object is greater than 0, this is the id of the account to which the vat charge will be posted. Defaults to null.description: A short discription of the purpose of the line item.quantity: A multiple to be applied to the amount of the line item.amount: The line item amount.$lineItem->ledgers: Ledger objects associated with the line item.$lineItem->transaction: The Transaction associated with the line item.$lineItem->account: The Account associated with the line item.$lineItem->vat: The Vat object associated with the line item.$lineItem->vatAccount: The Account object for posting vat charges associated with the line item.$lineItem->attributes(): Presents the line item’s attributes as an object. Useful for debugging.NegativeAmount: Line item amounts cannot be negative.MissingVatAccount: Line items with Vat objects whose rate is greater than 0 must have a vat account.