Announcement

**Isomorphic** · 20 Oct 2014, 12:14

Please check this out against the latest build, it looks like an already-fixed bug.

Note it's not technically allowed to re-use the same DataSourceField and ListGridField instances across different DataSources and ListGrids - you need to provide fresh instances. It's not clear whether that's the problem here, but you should correct this in your real application if it exists there too.

**lucasmilne** · 20 Oct 2014, 14:32

Tried with the latest build - SmartClient Version: v10.0p_2014-10-20/LGPL Development Only (built 2014-10-20)

Modified the code so that ListGridField's and DataSourceFields's are not being re-used. Still getting the error

Code:

public class Main implements EntryPoint {
	@Override
	public void onModuleLoad() {
		final List<DataSourceField> dsFields = new ArrayList<DataSourceField>(){{
			add(new DataSourceIntegerField("id", "Id"){{setPrimaryKey(true);}});
			add(new DataSourceTextField("name", "Name"));
		}};
		final List<ListGridField> lgFields = new ArrayList<ListGridField>(){{
			add(new ListGridField("id", "Id"));
			add(new ListGridField("name", "Name"));
		}};
		
		final List<DataSourceField> dsFields1 = new ArrayList<DataSourceField>(){{
			add(new DataSourceIntegerField("id", "Id"){{setPrimaryKey(true);}});
			add(new DataSourceTextField("name", "Name"));
			add(new DataSourceTextField("description", "Description"));
		}};
		final List<ListGridField> lgFields1 = new ArrayList<ListGridField>(){{
			add(new ListGridField("id"));
			add(new ListGridField("name"));
			add(new ListGridField("description"));
		}};
		
		final List<DataSourceField> dsFields2 = new ArrayList<DataSourceField>(){{
			add(new DataSourceIntegerField("id", "Id"){{setPrimaryKey(true);}});
			add(new DataSourceTextField("name", "Name"));
		}};
		final List<ListGridField> lgFields2 = new ArrayList<ListGridField>(){{
			add(new ListGridField("id", "Id"));
			add(new ListGridField("name", "Name"));
		}};
		
		
		
		final DataSource ds = new RestDataSource("service/items", null){{
			 setFields(dsFields.toArray(new DataSourceField[dsFields.size()]));
		}};
		 
		final ListGrid grid = new ListGrid(){{			
			setFetchDelay(400);
			setCanEdit(false);
			setCanMultiSort(false);
			setAutoFetchData(true);
			setShowFilterEditor(true);
			setFilterOnKeypress(true);
			setDataProperties(new ResultSet(){{
				setUseClientFiltering(false);
			}});
			setDataSource(ds);
			setFields(lgFields.toArray(new ListGridField[lgFields.size()]));
		 }};
		 
		 VLayout section = new VLayout(4);
		 section.setHeight100();
		 section.setWidth100();
		 section.addMember(grid);
		 section.addMember(new HLayout(4){{
			 addMember(new Button("Update Columns"){{
					addClickHandler(new ClickHandler() {
						@Override
						public void onClick(ClickEvent event) {
							grid.setDataSource(new RestDataSource("service/items", null){{
								 setFields(dsFields1.toArray(new DataSourceField[dsFields1.size()]));
							}});
							grid.setFields(lgFields1.toArray(new ListGridField[lgFields1.size()]));
							grid.invalidateCache();
							grid.fetchData();
						}
					});
				}});
			 addMember(new Button("Refresh"){{
				addClickHandler(new ClickHandler() {
					@Override
					public void onClick(ClickEvent event) {
						grid.setDataSource(new RestDataSource("service/items", null){{
							 setFields(dsFields2.toArray(new DataSourceField[dsFields2.size()]));
						}});
						grid.setFields(lgFields2.toArray(new ListGridField[lgFields2.size()]));
						grid.invalidateCache();
						grid.fetchData();
					}
				});
			}});
		}});
		section.show();
	}	
}

**Isomorphic** · 21 Oct 2014, 14:07

Hmm. We're taking a look. We'll let you know what we find.

Regards
Isomorphic Software

**Isomorphic** · 21 Oct 2014, 15:10

We've made a change which we think will address this issue. Please try the next nightly build (dated Oct 22 or above).

Regards
Isomorphic Software

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Removing columns from list grid after filter causes error.

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