redirect to edit page when user attempts to add page that already exists

- update src/*/views/default.py
- update src/*/routes.py
- write new test
- revise docs, double-checking line counts and highlighting

1 files changed, 3 insertions, 0 deletions

diff --git a/docs/tutorials/wiki2/src/views/tutorial/views/default.py b/docs/tutorials/wiki2/src/views/tutorial/views/default.py
index c1d402f6a..bb6300b75 100644
--- a/docs/tutorials/wiki2/src/views/tutorial/views/default.py
+++ b/docs/tutorials/wiki2/src/views/tutorial/views/default.py
@@ -58,6 +58,9 @@ def edit_page(request):
 @view_config(route_name='add_page', renderer='../templates/edit.jinja2')
 def add_page(request):
     pagename = request.matchdict['pagename']
+    if request.dbsession.query(Page).filter_by(name=pagename).count() > 0:
+        next_url = request.route_url('edit_page', pagename=pagename)
+        return HTTPFound(location=next_url)
     if 'form.submitted' in request.params:
         body = request.params['body']
         page = Page(name=pagename, data=body)