Help if Active Storage tables are missing

When a user tries to create a new attachment or blog and the matching table is missing from the database
(`active_storage_attachments` and `active_storage_blobs` by default), an informative error is displayed
that invites users to run the `active_storage:install` task.

1 files changed, 13 insertions, 0 deletions

diff --git a/actionpack/lib/action_dispatch/middleware/templates/rescues/invalid_statement.text.erb b/actionpack/lib/action_dispatch/middleware/templates/rescues/invalid_statement.text.erb
new file mode 100644
index 0000000000..033518cf8a
--- /dev/null
+++ b/actionpack/lib/action_dispatch/middleware/templates/rescues/invalid_statement.text.erb
@@ -0,0 +1,13 @@
+<%= @exception.class.to_s %><%
+  if @request.parameters['controller']
+%> in <%= @request.parameters['controller'].camelize %>Controller<% if @request.parameters['action'] %>#<%= @request.parameters['action'] %><% end %>
+<% end %>
+
+<%= @exception.message %>
+<% if @exception.message.match? %r{#{ActiveStorage::Blob.table_name}|#{ActiveStorage::Attachment.table_name}} %>
+To resolve this issue run: bin/rails active_storage:install
+<% end %>
+
+<%= render template: "rescues/_source" %>
+<%= render template: "rescues/_trace" %>
+<%= render template: "rescues/_request_and_response" %>