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OAF_资料主从关系Master-Detail联动的实现(案例)

2014-06-02 BaoXinjian

一、摘要

OAF和Form Builder一样,也需要主从块的管理,应为Form只需要建立一个relationship,相对简单

在OAF中实现主从Master-Detail联动的实现,更多的是通过代码去实现

比如在主块中添加一个event,在CO中去触发从块的查询语句,从而实现

 

二、案例

需求:当主块supplier选择后,系统自动关联子块Site,显示这个supplier下的所有sites

1. 建立Header Region -> Supplier Table

2. 建立Detail Region -> Supplier Sites Table

3. 在Header中建立Singel Section, 设定Action Type为FireAction, Event为SupplierSelect

4. 新增CO,在ProcessFormRequest中抓取Event SupplierSelect,调用AM的方法

5. 在AM中获取Supplier_Id, 将Supplier_Id赋值与VO中的具体SQL

6. VO中执行SQL

7. 查看结果

    (1). 查询Supplier Header,选中第一条Record

    (2). 选中第一条后,在Detail中显示所有Site Records

 

三、案例实现

Step1. 建立Structure

    

 

Step2. 新增CO,在ProcessFormRequest中抓取Event SupplierSelect,调用AM的方法

 1 public void processFormRequest(OAPageContext pageContext, OAWebBean webBean) {  
 2 
 3     super.processFormRequest(pageContext, webBean);
 4 
 5     OAApplicationModule am = (OAApplicationModule)pageContext.getApplicationModule(webBean);
 6 
 7     String event = pageContext.getParameter("event");
 8 
 9     if ("supplierSelect".equals(event)){
10 
11         am.invokeMethod("handleSupplierSelectionEvent");
12 
13     }
14 
15 } 

 

Step3. 在AM中获取Supplier_Id, 将Supplier_Id赋值与VO中的具体SQL

 1 public void handleSupplierSelectionEvent(){
 2 
 3     OADBTransaction txn = getOADBTransaction();
 4 
 5     String detailTableText = null;
 6 
 7     String supplierId = null;
 8 
 9     OAViewObject vo = (OAViewObject)findViewObject("SupplierVO1");
10 
11     Row masterRow = vo.getFirstFilteredRow ("SelectFlag", "Y");
12 
13     if (masterRow != null){
14 
15         vo.setCurrentRow(masterRow);
16 
17         supplierId = String.valueOf(masterRow.getAttribute("SupplierId"));
18 
19         MessageToken[] tokens = { new MessageToken("SUPPLIER_NAME", null)};
20 
21                                   detailTableText = txn.getMessage("AK", "FWK_TBX_SITES_FOR_SUPPLIER", tokens);
22 
23                                  }
24 
25     else{
26 
27         detailTableText = txn.getMessage("AK", "FWK_TBX_SUPPLIER_SITES", null);
28 
29     }
30 
31     SupplierSitesVOImpl voSites = this.getSupplierSitesVO1();
32 
33     if (voSites == null){
34 
35         MessageToken[] errTokens = { new MessageToken("OBJECT_NAME","SupplierSitesVO1")};
36 
37         throw new OAException("AK", "FWK_TBX_OBJECT_NOT_FOUND", errTokens);
38 
39     }
40 
41     voSites.initQuery(supplierId);
42 
43 }

 

Step4. VO中执行SQL

 1 public void initQuery (String SupplierId) {
 2 
 3     if (SupplierId != null){    
 4 
 5         setWhereClause("SUPPLIER_ID = :1");
 6 
 7         setWhereClauseParams(null); // Always reset
 8 
 9         setWhereClauseParam(0, SupplierId);    
10 
11         executeQuery();
12 
13     }
14 
15 }

 

四、案例测试

Test. 查看结果

Test1. 查询Supplier Header,选中第一条Record
    

Test2. 选中第一条后,在Detail中显示所有Site Records