JPA storage

[lrkwz]

My JPA pojos are sort of
Code:

@Entity
class Master{
...

@ManyToOne
Set<Slave> slaves;
}

I can create and save a Master object in a ListGrid (my "dao" service is called) but I cannot populate the slaves collection since your classes claim that the id is missing (of course is there with all the needed getters/setters).

import com.google.gwt.core.client.EntryPoint;
import com.smartgwt.client.core.KeyIdentifier;
import com.smartgwt.client.data.Criteria;
import com.smartgwt.client.data.DataSource;
import com.smartgwt.client.types.ListGridEditEvent;
import com.smartgwt.client.types.VisibilityMode;
import com.smartgwt.client.util.KeyCallback;
import com.smartgwt.client.util.Page;
import com.smartgwt.client.util.SC;
import com.smartgwt.client.widgets.IButton;
import com.smartgwt.client.widgets.Label;
import com.smartgwt.client.widgets.events.ClickEvent;
import com.smartgwt.client.widgets.events.ClickHandler;
import com.smartgwt.client.widgets.form.DynamicForm;
import com.smartgwt.client.widgets.form.fields.SelectItem;
import com.smartgwt.client.widgets.grid.ListGrid;
import com.smartgwt.client.widgets.grid.ListGridField;
import com.smartgwt.client.widgets.grid.ListGridRecord;
import com.smartgwt.client.widgets.grid.events.SelectionChangedHandler;
import com.smartgwt.client.widgets.layout.SectionStack;
import com.smartgwt.client.widgets.layout.SectionStackSection;
import com.smartgwt.client.widgets.layout.VLayout;

public class OrderManagement implements EntryPoint {

	private static final int MAXWIDTH = 1024 - 80;
	private SelectItem shipTo = new SelectItem("MyShipTo");

	/**
	 * Creates a new instance of JPADS
	 */
	public OrderManagement() {
	}

	/**
	 * The entry point method, called automatically by loading a module that
	 * declares an implementing class as an entry-point
	 */
	public void onModuleLoad() {

		KeyIdentifier debugKey = new KeyIdentifier();
		debugKey.setCtrlKey(true);
		debugKey.setKeyName("D");

		Page.registerKey(debugKey, new KeyCallback() {
			public void execute(String keyName) {
				SC.showConsole();
			}
		});

		Label orderListLabel = new Label();
		orderListLabel.setContents("Order List");
		orderListLabel.setWidth("90%");

		final DataSource orderDS = DataSource.get("order_DataSource");

		ListGrid orderList = new ListGrid();
		orderList.setDataSource(orderDS);
		orderList.setWidth(MAXWIDTH);
		orderList.setHeight(150);
		orderList.setAlternateRecordStyles(true);
		orderList.setAutoFetchData(true);
		orderList.setDataPageSize(50);
		orderList.setCanRemoveRecords(true);

		IButton newOrderButton = new IButton("Add New Order");
		newOrderButton.setWidth(120);

		VLayout orderListLayout = new VLayout();
		orderListLayout.addMember(orderListLabel);
		orderListLayout.addMember(orderList);
		orderListLayout.addMember(newOrderButton);

		final SectionStack sectionStack = new SectionStack();
		sectionStack.setVisibilityMode(VisibilityMode.MULTIPLE);
		sectionStack.setWidth(MAXWIDTH);
		sectionStack.setHeight(1280 - 80);

		SectionStackSection section1 = new SectionStackSection("Order Header");
		section1.setExpanded(true);
		section1.setResizeable(true);

		// final DynamicForm orderForm = new DynamicForm();
		// orderForm.setDataSource(orderDS);

		final DynamicForm orderForm = new DynamicForm();
		orderForm.setDataSource(orderDS);
		shipTo.setOptionDataSource(DataSource.get("stakeholder_DataSource"));
		shipTo.setPickListCriteria(new Criteria("schema", "SHIPTO"));
		shipTo.setAutoFetchData(true);

		orderForm.setItems(shipTo);

		section1.addItem(orderForm);

		sectionStack.addSection(section1);
		sectionStack.collapseSection(0);

		// lista prodotti
		SectionStackSection section2 = new SectionStackSection("Product Search");
		section2.setExpanded(true);
		section2.setResizeable(true);

		final DataSource productDS = DataSource.get("product_DataSource");

		final ListGrid productGrid = new ListGrid();
		productGrid.setAlternateRecordStyles(true);
		productGrid.setDataSource(productDS);
		productGrid.setWidth(MAXWIDTH);
		productGrid.setHeight(150);
		productGrid.setAlternateRecordStyles(true);
		productGrid.setAutoFetchData(true);
		productGrid.setDataPageSize(50);
		productGrid.setShowFilterEditor(true);

		section2.addItem(productGrid);
		/*
		 * section2.addItem(newProductButton);
		 * section2.addItem(saveProductButton);
		 */
		sectionStack.addSection(section2);

		// lista stakeholder
		SectionStackSection section3 = new SectionStackSection("StakeHolder");
		section3.setExpanded(false);
		section3.setResizeable(true);

		final DataSource stakeholderDS = DataSource.get("stakeholder_DataSource");

		final ListGrid stakeholderGrid = new ListGrid();
		stakeholderGrid.setAlternateRecordStyles(true);
		stakeholderGrid.setDataSource(stakeholderDS);
		stakeholderGrid.setWidth(MAXWIDTH);
		stakeholderGrid.setHeight(150);
		stakeholderGrid.setAlternateRecordStyles(true);
		stakeholderGrid.setAutoFetchData(true);
		stakeholderGrid.setDataPageSize(50);
		stakeholderGrid.setShowFilterEditor(true);
		stakeholderGrid.setCanEdit(true);
		stakeholderGrid.setEditEvent(ListGridEditEvent.CLICK);
		stakeholderGrid.setCanRemoveRecords(true);
		ListGridField addressSH = new ListGridField("address", "address");
		ListGridField citySH = new ListGridField("city", "city");
		ListGridField countrySH = new ListGridField("country", "country");
		ListGridField descriptionSH = new ListGridField("description", "description");
		ListGridField idTransmitterSH = new ListGridField("idTransmitter", "idTransmitter");
		ListGridField nameSH = new ListGridField("name", "name");
		ListGridField schemaSH = new ListGridField("schema", "schema");
		ListGridField companySH = new ListGridField("company", "company");
		ListGridField creditTermsCodeSH = new ListGridField("creditTermsCode", "creditTermsCode");
		ListGridField truckRequirementsSH = new ListGridField("truckRequirements", "truckRequirements");
		ListGridField divisionSH = new ListGridField("division", "division");
		ListGridField paymentFormSH = new ListGridField("paymentForm", "paymentForm");
		ListGridField districtSH = new ListGridField("district", "district");
		stakeholderGrid.setFields(descriptionSH, nameSH, countrySH, citySH, addressSH, idTransmitterSH, schemaSH, companySH,
				creditTermsCodeSH, truckRequirementsSH, divisionSH, paymentFormSH, districtSH);

		IButton newStakeholderGridButton = new IButton("New Stakeholder");
		newStakeholderGridButton.addClickHandler(new ClickHandler() {
			@Override
			public void onClick(ClickEvent event) {
				stakeholderGrid.startEditingNew();
				// stakeholderGrid.setEditValue(0, "version", 1);
				stakeholderGrid.setEditValue(0, "schema", "SHIPTO");
				stakeholderGrid.setEditValue(0, "company", "100");
				stakeholderGrid.setEditValue(0, "creditTermsCode", "1");
				stakeholderGrid.setEditValue(0, "truckRequirements", "1");
				stakeholderGrid.setEditValue(0, "division", "12");
				stakeholderGrid.setEditValue(0, "paymentForm", "1");
				stakeholderGrid.setEditValue(0, "district", "1");
			}
		});

		IButton saveStakeholderButton = new IButton("Save Stakeholder");
		saveStakeholderButton.addClickHandler(new ClickHandler() {
			public void onClick(ClickEvent event) {
				// SC.warn("number of orderLines to save:" +
				// orderLineList.getRecords().length);
				stakeholderGrid.saveAllEdits();
			}
		});

		section3.addItem(stakeholderGrid);
		section3.addItem(newStakeholderGridButton);
		section3.addItem(saveStakeholderButton);
		sectionStack.addSection(section3);

		SectionStackSection section4 = new SectionStackSection("Order Lines");
		section4.setExpanded(true);
		section4.setResizeable(true);

		final DataSource orderLineDS = DataSource.get("orderLine_DataSource");

		final ListGrid orderLineList = new ListGrid();
		orderLineList.setDataSource(orderLineDS);
		orderLineList.setWidth(MAXWIDTH);
		orderLineList.setHeight(224);
		orderLineList.setAlternateRecordStyles(true);
		orderLineList.setSaveLocally(true);
		orderLineList.setSaveByCell(true);
		orderLineList.setShowFilterEditor(true);
		orderLineList.setCanEdit(true);
		orderLineList.setEditEvent(ListGridEditEvent.CLICK);
		orderLineList.setCanRemoveRecords(true);
		ListGridField quantity = new ListGridField("quantity", "Quantity");
		ListGridField unitPrice = new ListGridField("unitPrice", "Unit Price");
		unitPrice.setCanEdit(false);
		ListGridField product = new ListGridField("product", "Product");
		product.setCanEdit(false);
		// ListGridField version = new ListGridField("version", "Version");
		// product.setValueField(productGrid.getSelectedRecord().getAttribute("id"));
		orderLineList.setFields(quantity, unitPrice, product);

		/*
		 * IButton newOrderLineButton = new IButton("Add New OrderLine");
		 * newOrderLineButton.addClickHandler(new ClickHandler() { public void
		 * onClick(ClickEvent event) { orderLineList.startEditingNew(); } });
		 */

		IButton saveOrderLineButton = new IButton("Save Order");
		saveOrderLineButton.addClickHandler(new ClickHandler() {
			public void onClick(ClickEvent event) {
				SC.logDebug("number of orderLines to save:" + orderLineList.getRecords().length);
				orderForm.setValue("orderLines", orderLineList.getRecords());
				orderForm.saveData();
			}
		});

		section4.addItem(orderLineList);
		// section4.addItem(newOrderLineButton);
		section4.addItem(saveOrderLineButton);
		sectionStack.addSection(section4);

		VLayout layout = new VLayout();
		layout.setTop("45px");
		layout.setStyleName("ordermanagement_container");

		layout.addMember(orderListLayout);
		layout.addMember(sectionStack);

		orderList.addSelectionChangedHandler(new SelectionChangedHandler() {
			@Override
			public void onSelectionChanged(com.smartgwt.client.widgets.grid.events.SelectionEvent event) {
				if (event.getState()) {
					// SC.warn("number of orderLines:" +
					// event.getSelectedRecord().getAttributeAsRecordArray("orderLines").length);
					sectionStack.setDisabled(false);
					sectionStack.expandSection(0);
					orderLineList.setData(event.getSelectedRecord().getAttributeAsRecordArray("orderLines"));
					orderForm.editRecord(event.getSelectedRecord());
				} else {
					sectionStack.setDisabled(true);
				}

			}
		});

		productGrid.addSelectionChangedHandler(new SelectionChangedHandler() {
			@Override
			public void onSelectionChanged(com.smartgwt.client.widgets.grid.events.SelectionEvent event) {
				orderLineList.startEditingNew();
				sectionStack.expandSection(3);
				orderLineList.setEditValue(0, "unitPrice", productGrid.getSelectedRecord().getAttributeAsLong("unitPrice"));
				orderLineList.setEditValue(0, "quantity", 1);
			}
		});

		newOrderButton.addClickHandler(new ClickHandler() {
			public void onClick(ClickEvent event) {
				sectionStack.setDisabled(false);
				sectionStack.expandSection(0);
				shipTo.fetchData();
				orderLineList.setData(new ListGridRecord[0]);
				orderForm.editNewRecord();
			}
		});

		layout.draw();
	}
}

_About project environment_
My app's architecture is roughly based on:
* data access layer: spring-roo managed data-access core classes based on JPA-HIBERNATE-DB2
* business layer: spring-mvc webapp with thymeleaf templating engine
* presentation layer: twitter boostrap responsive design HTML framework

See http://forums.smartclient.com/showpo...53&postcount=3 for datasources and version info.

Thank you
-Luca