How to create a dependent list of values based on the relationship master detail

Hello

I'm on jdev 11.1.2.4.

1. I have a table main 'Reception' with the columns receipt_id and student_id (ReceiptVO)

2. as well as an array of details 'Receipt_Detail' with the columns receipt_id, course_id (ReceiptDetailVO)

(There are some othere columns in the two tables, but I've only mentioned those which is relevant to this example.)

3. the two tables are related with receipt_id.

I want to create a dependent class LOV that filter courses related to the student selected in the main table. (There is a student_course table that holds student_id, relationship of course_id, StudentCourseVO)

to do this, I have

1 created VO based on the student_course table

2 Add a view that filters based on the id of the student

3 assigned this VO to receipt_detail tables course_id

It comes

in the accessor receipt_details VO view, I do not show the ability to select the student_id of the main table (IE ReceiptVO). It only shows the columns in the ReceiptDetailVO.

Please can you help me?

Thank you

What you need in your ReceiptDetailVO is the StudentId of master ReceiptVO attribute.

To do this, you can:

1. for your ViewLink (between ReceiptVO and ReceiptDetailVO), you must generate the Source accessor:

In this way, in the VoRowImpl Java to ReceiptDetailVO class, you will get a way to access master ReceiptVO line (you can find a new method with the name that you gave the name of the accessor in the top of the dialog box)

2. then, in the ReceiptDetailVO, create Transient attribute, say, MasterStudentId. Access Java's VORowImpl class, within the get for this new attribute accessor method, use the previous step name accessor method to get the line main and finally master StudentId.

3. the rest is easy - use this new attribute transitional to filter LOV about the student teacher ID...

Tags: Java

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