Having multiple level of master/detail with data tags

Hi,
Here is a Database Model for the purpose :
- An EMPLOYEE is in one and only one DEPT
- a DEPT has several EMPLOYEEs
Suppose that:
- An EMPLOYEE come from one and only one SCHOOL which is in a SCHOOL table
- a SCHOOL have educated several EMPLOYEEs
Suppose that:
- A SCHOOL is part of one and only one SCHOOL_CATEGORY (Engineer school for example)
- A SCHOOL_CATEGORY concerns several SCHOOL
I would like to show a JSP page containing :
Employees for DEpt : 12456
table headers:
Employee ID | Employee Name | School Name | School Category Name
as you can see we have a master/detail between Master view DEPT and Detail view EMPLOYEE and EMPLOYEE is master for School which is detail view for employee and school category is detail view for school which is master for school category ! (do you follow me ? ;-))
Do you see my concerns ??
How do we do that whith data tags ??
Thank's a lot for you help...
It's urgent...

Hi,
I guess you are trying to achieve this using BC4J if so then you can modify your view object for employee so as to have School and category listed when you base your datatags on that view.
You would need to modify your view object query by using expert mode.
Thanks
<BLOCKQUOTE><font size="1" face="Verdana, Arial">quote:</font><HR>Originally posted by Olivier LAHILLE ([email protected]):
Hi,
Here is a Database Model for the purpose :
- An EMPLOYEE is in one and only one DEPT
- a DEPT has several EMPLOYEEs
Suppose that:
- An EMPLOYEE come from one and only one SCHOOL which is in a SCHOOL table
- a SCHOOL have educated several EMPLOYEEs
Suppose that:
- A SCHOOL is part of one and only one SCHOOL_CATEGORY (Engineer school for example)
- A SCHOOL_CATEGORY concerns several SCHOOL
I would like to show a JSP page containing :
Employees for DEpt : 12456
table headers:
Employee ID | Employee Name | School Name | School Category Name
as you can see we have a master/detail between Master view DEPT and Detail view EMPLOYEE and EMPLOYEE is master for School which is detail view for employee and school category is detail view for school which is master for school category ! (do you follow me ? ;-))
Do you see my concerns ??
How do we do that whith data tags ??
Thank's a lot for you help...
It's urgent...<HR></BLOCKQUOTE>
null

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-Use a temp database table to hold the detail record from the second form and use it to transfer values to the detail record in the master-detail
-Use a global record group
-We can't use parameter list to pass back these values.
So my question is:
What would be the most efficient way to have an insert button on the detail block that would allow the user to have a pop up where he can insert his values and then be brought back to the master-detail.
Thanks.

Hello again,
May be I was not clear enough.
Scenario 1: We use the master-detail form as is with the default oolbar. In this case, the user can insert the detail records one by one without needing the primary-foreign key value since this is handled by default.
Once we save the form (commit_form), I use the pre-insert trigger to get the master block primary key generated from the sequence and since the detail block key is copied from this value, both are saved correctly and it is the end of the story.
Scenario 2: As explained in the initial post, the user will populate the detail records one by one by clicking on the -INSERT DETAIL- button and hence has a window where he can insert the detail info and then be brought back to the master-detail form every time he enters a new detail record.
The problem here is that I can't generate the primary key for the master block since the client has the following requirement:
The user can always change his mind and not complete, meaning save the form, his process
As such, the key should be generated in the last step before Commit.

Master Detail with programmatic ViewObjects and writeXML

Hi,
Using jdev 11.1.1.3.
I created two programmatic ViewObjects related by a ViewLink (1to*).
From an application module method, I create a row in the master ViewObject. Then using the accessor obtain the RowIterator for the detail, and create a row on that detail.
If then I use the writeXML method on the master ViewObject, the output is only representing the master, not the detail.
Here is the code:
        VO_MasterImpl voMaster = getVO_Master2();
        //create the master row
        VO_MasterRowImpl rowMaster = (VO_MasterRowImpl)voMaster.createRow();
        String id = "unique";
        rowMaster.setAtt1(id);
        rowMaster.setAtt2("something");
        //obtain the rowIterator for the detail
        RowIterator detail = rowMaster.getVO_Detail();
        //create the detail row
        VO_DetailRowImpl rowDetail = (VO_DetailRowImpl)detail.createRow();
        rowDetail.setAtt1(id);
        rowDetail.setAtt2("sth2");
        //insert the detail row
        detail.insertRow(rowDetail);
        //insert the master row
        voMaster.insertRow(rowMaster);
        //obtain the xml
        Node node = voMaster.writeXML(-1,XMLInterface.XML_OPT_ALL_ROWS);master.att1 is key for Master.
detail.att1 is foreign key to Master.
This is the contents of node:
<?xml version = '1.0' encoding = 'UTF-8'?>
<VO_Master><VO_MasterRow><Att1>unique</Att1><Att2>something</Att2></VO_MasterRow></VO_Master>What I would expect is that the detail row (<VO_DetailRow>) appears within the <VO_MasterRow>.
Anyone knows what I'm missing here?
Thanks
Roger B
Edited by: RogerB on 30-Dec-2010 02:16

Hi,
After some more tests...
As said before, I tried with SQL VOs (Dept and Employees). No differences between the VL Dept and Emp, and the VL VO_Master and VO_Detail. They have same relationship (1 to *) and also same (changing names) SQL where (source and destination).
I debuged the code, using ADF source code, and noticed the following:
When iterating the rows to write the XML, at ViewRowImpl, it takes the AttributeDef and perform different actions depending on mKind (ATTR_ASSOCIATED_ROW or ATTR_ASSOCIATED_ROWITERATOR). Second one is for ViewLink.
Once inside ATTR_ASSOCIATED_ROWITERATOR, I can see that the default RowSetIterator, has no rows (getRowCount = 0). So no child rows (for the VO_Detail), are added to the XML Node.
On the other hand, the Dept and Employees, I can see that the default RowSetIterator has rows.
Could this be related to the fact that Programatic ViewObjects are not persisted anywhere?
any other clues appreciated? Does anyone tried this before (programatic master detail relationship writing to XML) ?
Regards,
Roger

Master detail with from clause query

Hi!
I have 2 blocks: master and detail. The master block is based on a from clause query. Since I have to insert, update and delete on this block I have created the on-insert, on-update, on-delete and on-lock triggers (and the respective procedures).
In this block I have on-populate-details and pre-delete triggers created by the master-detail relation.
Now I have a problem!
Since I only want to commit to db when I click the "ok" button and I want to insert and delete records from these 2 blocks, when I insert records into the detail block (and master too), it forces me to save changes if I change the focus of the current record of de master block to another record within the same block.
How can I do this in order to insert records saving changes only when I click the button?
Thanks!
Ana

I think that it is intended behaviour: when detail records are populated and there are uncommited changes so Forms asks if user wants to save changes.

Having multiple level of master/detail with data tags

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