Create a Shopping Cart Business Object

Hint: In case the CAL instance is not used, please set up for developer extensibility to get ZLOCAL package.

• Create software component for local cloud-ready development with ZLOCAL
• Create a structure package with ZLOCAL

1. Select ZLOCAL > New > ABAP Package.

   

2. Create new ABAP package:

   • Name: Z_PURCHASE_REQ_###
   • Description: Package ###
   • Check Add to favorite packages

   

   Click Next >.

3. Click Next >.

   

4. Create a new request:

   • Request Description: TR12345

   

   Click Finish.

1. Right-click your package Z_PURCHASE_REQ_### and select New > Other ABAP Repository Object.

   

2. Search for database table, select it and click Next >.

   

3. Create new database table:

   • Name: ZASHOPCART_###
   • Description: Shopping cart table

   

   Click Next >.

4. Click Finish.

   

5. Replace your code with following:

```ABAP
@EndUserText.label : 'Shopping cart table'
@AbapCatalog.enhancement.category : #NOT_EXTENSIBLE
@AbapCatalog.tableCategory : #TRANSPARENT
@AbapCatalog.deliveryClass : #A
@AbapCatalog.dataMaintenance : #RESTRICTED
define table zashopcart_### {
key client            : abap.clnt not null;
key order_uuid        : sysuuid_x16 not null;
order_id              : abap.numc(8) not null;
ordered_item          : abap.char(40) not null;
@Semantics.amount.currencyCode : 'zashopcart_###.currency'
price                 : abap.curr(11,2);
@Semantics.amount.currencyCode : 'zashopcart_###.currency'
total_price           : abap.curr(11,2);
currency              : abap.cuky;
order_quantity        : abap.numc(4);
delivery_date         : abap.dats;
overall_status        : abap.char(30);
notes                 : abap.string(256);
created_by            : abp_creation_user;
created_at            : abp_creation_tstmpl;
last_changed_by       : abp_lastchange_user;
last_changed_at       : abp_lastchange_tstmpl;
local_last_changed_at : abp_locinst_lastchange_tstmpl;
purchase_requisition  : abap.char(10);
pr_creation_date      : abap.dats;
}
```

6. Save and activate.

1. Right-click your database table ZASHOPCART_### and select Generate ABAP Repository Objects.

   

2. Create new ABAP repository object:

   • Generator: ABAP RESTful Application Programming Model: UI Service

   

   Click Next >.

3. Maintain the required information on the Configure Generator dialog to provide the name of your data model and generate them.

   For that, navigate through the wizard tree (Business Objects, Data Model, etc…), maintain the artefact names provided in the table below, and press Next >.

   Verify the maintained entries and press Next > to confirm. The needed artifacts will be generated.

   Please note: Error Invalid XML format.
   If you receive an error message Invalid XML format of the response, this may be due to a bug in version 1.26 of the ADT tools. An update of your ADT plugin to version 1.26.3 will fix this issue.

| **RAP Layer**                          | **Artefacts**           | **Artefact Names**                                  |
|----------------------------------------|-------------------------|-----------------------------------------------------|
| **Business Object**                    |                         |                                                     |
|                                        | **Data Model**          | Data Definition Name: **`ZR_SHOPCARTTP_###`**     |
|                                        |                         | Alias Name: **`ShoppingCart`**                        |  
|                                        | **Behavior**            | Implementation Class: **`ZBP_SHOPCARTTP_###`**    |
|                                        |                         | Draft Table Name: **`ZDSHOPCART_###`**            |  
| **Service Projection (BO Projection)** |                         | Name: **`ZC_SHOPCARTTP_###`**                     |
| **Business Services**                  |                         |                                                     |
|                                        | **Service Definition**  | Name: **`ZUI_SHOPCART_###`**                      |
|                                        | **Service Binding**     | Name: **`ZUI_SHOPCART_O4_###`**                   |
|                                        |                         | Binding Type: **`OData V4 - UI`**                   |

![cds](https://raw.githubusercontent.com/sap-tutorials/abap-core-development/main/tutorials/abap-s4hanacloud-procurement-purchasereq-shop/generator3.png)                    

Click **Next >**.

4. Click Finish.

   

In this tutorial example a SAP S/4HANA Cloud, ABAP environment system was used. The mode therefore is strict (2).

1. Open your behavior definition ZR_SHOPCARTTP_### to enhance it. Add the following read-only fields to your behavior definition:

```ABAP
,
PurchaseRequisition,
PrCreationDate,
DeliveryDate;
```

 ![projection](https://raw.githubusercontent.com/sap-tutorials/abap-core-development/main/tutorials/abap-s4hanacloud-procurement-purchasereq-shop/bdef3x.png)

2. Check your behavior definition:

```ABAP
managed implementation in class ZBP_SHOPCARTTP_### unique;
strict ( 2 );
with draft;

define behavior for ZR_SHOPCARTTP_### alias ShoppingCart
persistent table zashopcart_###
draft table ZDSHOPCART_###
etag master LocalLastChangedAt
lock master total etag LastChangedAt
authorization master( global )

{
field ( readonly )
   OrderUUID,
   CreatedAt,
   CreatedBy,
   LastChangedAt,
   LastChangedBy,
   LocalLastChangedAt,
   PurchaseRequisition,
   PrCreationDate,
   DeliveryDate;

field ( numbering : managed )
   OrderUUID;

create;
update;
delete;

draft action Edit;
draft action Activate;
draft action Discard;
draft action Resume;
draft determine action Prepare;

mapping for ZASHOPCART_###
{
   OrderUUID = ORDER_UUID;
   OrderID = ORDER_ID;
   OrderedItem = ORDERED_ITEM;
   Price = PRICE;
   TotalPrice = TOTAL_PRICE;
   Currency = CURRENCY;
   OrderQuantity = ORDER_QUANTITY;
   DeliveryDate = DELIVERY_DATE;
   OverallStatus = OVERALL_STATUS;
   Notes = NOTES;
   CreatedBy = CREATED_BY;
   CreatedAt = CREATED_AT;
   LastChangedBy = LAST_CHANGED_BY;
   LastChangedAt = LAST_CHANGED_AT;
   LocalLastChangedAt = LOCAL_LAST_CHANGED_AT;
   PurchaseRequisition = PURCHASE_REQUISITION;
   PrCreationDate = PR_CREATION_DATE;
} 
}       
```

3. Save and activate.

Choose between the tabs Cloud and On-premise and follow the publishing process.