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adding one column in xisting database

sasmita swain, módosítva 11 év-val korábban

adding one column in xisting database

Regular Member Bejegyzések: 183 Csatlakozás dátuma: 2012.02.24. Legújabb bejegyzések
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
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David H Nebinger, módosítva 11 év-val korábban

RE: adding one column in xisting database

Liferay Legend Bejegyzések: 14914 Csatlakozás dátuma: 2006.09.02. Legújabb bejegyzések
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, módosítva 11 év-val korábban

RE: adding one column in xisting database

Regular Member Bejegyzések: 183 Csatlakozás dátuma: 2012.02.24. Legújabb bejegyzések
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, módosítva 11 év-val korábban

RE: adding one column in xisting database

Expert Bejegyzések: 268 Csatlakozás dátuma: 2011.03.04. Legújabb bejegyzések
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