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Can i transfer Integer to ItemID?
Hello, i have Integer field in db table - parentID. I want built tree, where parentID equal this field.
But vaadin dont transfer integer to ItemID directly.
Can i solved this problem?
Can you box it with Integer object?
Johannes Häyry: Can you box it with Integer object?
What does it mean "box it with integer object" - give me example please...
I mean to use Java autoboxing and put integer as an Integer. Container API and Tree component support adding an item with a type of Object so the integer should be usable.
My variable which getting value from db is Object type
if i adding hierarchy Items manually with integer id like in the Vaadin Book - all OK, if Items from SQL container with integer column - not work
Code below not work
Object parentID = it.getItemProperty("hierarhy").getValue(); ttable.setParent(itemId, parentID);
What is the error it is producing?
I have no error in this case, but items dont want conect in hierarchy
if i find parent item with Equal filter then after that all ok
Are you using addItem(Object) and not addItem() method when adding items?
i dont using additem function.
i doing next :
- Connect SQL container to db table
- Create TreeTable object
- Connect TreeTable with SQL container
- Loop on TreeTable's items and connect it in hierarchy
I'm sure, you don't want to use SQLContainer for anything.
I would query the ResultSet from the database and fill TreeTable manually.
(EDIT: I don't think SQLContainer supports hierarchical)
Here's a very good blog about that: https://vaadin.com/blog/-/blogs/building-a-web-ui-for-mysql-databases-in-plain-java-
i know about manually creation items approach, but i thing that itemID is integer type wrapping in object type, but it is wrong definition in real situation.