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Not sure what you mean by filtering a view by a specific role, however you can filter a view by a specific User but not a specific role, Unless this view is listing out posts.
Please provide a little bit more clarity for me as this could also involve some nested views.
So right now how view works is that you wouldn't need a filter for this. It will automatically list out all the posts of users who create the post.
As you say your admin role doesn't create posts so this would mean that all other posts are created by non-admins which is what view will already list out.
Is it that a post is appearing in the view list that you don't want to appear?
You want to create a view that lists all the posts by users of Roles author, editor or subscriber.
In my initial post I mentioned that the view would list out all this by default. It will list out all the posts that are created by the users.
Your next response was "the user post is ( a page ) .. i want to create a view ( view of listing ) of users pages .. not all the site pages ."
And my previous response was that you can filter your view for the user's page that you are on.
Perhaps you need to provide me with an example so I know exactly what you are talking about.
Right now based on your last response, i'm assuming that you want a page to list out all the posts of users that are subscribers, a separate page for posts from users that are authors and finally a page for users that are editors.
Please let me know if this is what you are referring to.
You are going to add this filter to the view that is listing out the posts but instead of selecting "Post author is the author of the page where this View is shown" you will select "Post author is set by the Parent User View".