adding one column in xisting database

[sasmita swain，修改在11 年前。]

Hi

I want to add one more column in shopping category table..how to do by using expando

can you give example of this

Thanks

Sasmita

[David H Nebinger，修改在11 年前。]

Every entity has an expando bridge that you can use to access extra values.

Use the XxxLocalServiceUtil to retrieve the entity that you want to add an expando value to.

Once you have the entity, you can use:

 if (entity.getExpandoBridge().hasAttribute("MyAttribute")) {
   entity.getExpandoBridge().getAttribute("MyAttribute");
 }

This returns a Serializable instance which you can cast to your desired type.

To set the entity, you can use:

 if (! entity.getExpandoBridge().hasAttribute("MyAttribute")) {
   // add the entity definition with the type the value is.
   entity.getExpandoBridge().addAttribute("MyAttribute", ExpandoColumnConstants.INTEGER);
 }

 // now set the value
 entity.getExpandoBridge().setAttribute("MyAttribute", myValue);

myValue must be serializable.

QED.

[sasmita swain，修改在11 年前。]

Thanks David

actually i create table like custom field in expando table and successfully adding column to expandocolumn table..

my code is:

public void init() throws PortletException {


ExpandoTable table = null;


long categoryId = Long.parseLong("10154");
try{
ExpandoTable existingTable=ExpandoTableLocalServiceUtil.getTable(45506);
/*table=ExpandoTableLocalServiceUtil.addDefaultTable(categoryId, ShoppingCategory.class.getName());*/
String tablename=existingTable.getName();
System.out.println("table name = " + tablename);
}catch (Exception e) {
e.printStackTrace();
}
ExpandoColumn column = null;
ExpandoRow row=null;

/*long tableId = table.getTableId();
System.out.println("tableId ="+tableId);
*/
try {

column = ExpandoColumnLocalServiceUtil.addColumn(10904, "decription1", ExpandoColumnConstants.STRING);
row=ExpandoRowLocalServiceUtil.addExpandoRow(row);
}

catch(DuplicateColumnNameException dcne) {


// Get the ExpandoColumn ("comments-astronauts")


try {
column = ExpandoColumnLocalServiceUtil.getColumn(10904, "decription1");
row=ExpandoRowLocalServiceUtil.getRow(11002);
} catch (SystemException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (PortalException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}

} catch (PortalException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (SystemException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}



super.init();
in jsp i hav 2 text fields.. i want to insert values in to expandovalues table..

Thanks

Sasmita





}

[Siby Mathew，修改在11 年前。]

Hi Sasmita,
David's code is also internally using the same API's that you are using.
You can use his code snippet as its simpler and more readable.

Also In my opinion, in your code, you should try to fetch the values first ...and then on the exception block, try to add new if not present.

Thanks,
Siby