I have a sub-site Community. On home page of subsite , I have a button Join a community. Refer to this article Community, user can click this button, and then the button hides.
If user has Read permission, when he clicks button, there will a request send to site administrator. And administrator should give him Contribute permission.
In my site, user cannot have permission to delete list item, which is included in Contribute permission. So I create a new permission level which contains view, add, update list items and documents. But it does not work unless user has right to delete item.
Which permission for Join a community in sharepoint 2013? Delete item is a necessary permission ?