Hello, I want to pass a selected data object and open a page when I press a button like the edit button below: With the selected object I want to show a new data grid on the page where all child object will be shown where the selected object serves as parent. I also can't find in the page properties where I have to indicate that an object is expected.
Create a new page with a Dataview pointed to the Activity entity. Inside of this Dataview, place a Datagrid that retrieves the child objects you want via an association. On your original page, add an open page button in the control bar of the data grid. Configure that button to open your newly created page.