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Adding Custom Attributes to Communities
Introduction #
This is an example of adding an Expando attribute called "title" on a com.liferay.portal.model.Group (a community).
Creating the Attribute #
void createAttribute(long companyId)
ExpandoBridgeImpl expandoBridge = new ExpandoBridgeImpl(com.liferay.portal.model.Group.class.getName());
if (expandoBridge.hasAttribute("title")) {
log.debug("attribute title already exists");
}
else {
log.info("adding title attribute");
expandoBridge.addAttribute("title");
}
}
Setting Permissions for Community Members #
void setPermissions(long companyId) {
ExpandoBridgeImpl expandoBridge = new ExpandoBridgeImpl(com.liferay.portal.model.Group.class.getName());
Role guest = RoleLocalServiceUtil.getRole(companyId, RoleConstants.GUEST);
Role member = RoleLocalServiceUtil.getRole(companyId, RoleConstants.COMMUNITY_MEMBER);
ExpandoColumn column = ExpandoColumnLocalServiceUtil.getColumn(
expandoBridge.getClassName(),
ExpandoTableConstants.DEFAULT_TABLE_NAME,
"title");
String[] actionsRO = new String[] { ActionKeys.VIEW };
String[] actionsRW = new String[] { ActionKeys.VIEW, ActionKeys.UPDATE };
// make sure the resource exists
Resource resource = ResourceLocalServiceUtil.addResource(
companyId,
ExpandoColumn.class.getName(),
ResourceConstants.SCOPE_INDIVIDUAL,
String.valueOf(column.getColumnId()));
PermissionLocalServiceUtil.setRolePermissions(guest.getRoleId(), actionsRO, resource.getResourceId());
PermissionLocalServiceUtil.setRolePermissions(member.getRoleId(), actionsRW, resource.getResourceId());
}
Using the Attribute #
Java #
void updateTitle(Group group, String title) {
group.getExpandoBridge().setAttribute("title", title);
log.info("updated group " + group.getName() +
", set title = " + twinspace.getExpandoBridge().getAttribute(""));
}Velocity #
Use the community (=Group) title in the theme, for ex. in portal_normal.vm
#set ($community_title = $themeDisplay.getScopeGroup().getExpandoBridge().getAttribute("title"))
Troubleshooting #
Permissions Error #
- Instead of using the ExpandoBridge you can use ExpandoTableLocalServiceUtil and ExpandoColumnLocalServiceUtil. These services don't use permission checking. This is a bit more code.
- You can temporarily set a permissionChecker with PermissionThreadLocal.setPermissionChecker(pc). Don't forget to reset it to the original one after you are done.
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