undefined method `to_key' for -- NOT USING MONGO

I found a gazillion answers for my issue if I was using Mongo, but none of th开发者_如何学Goe ones I see work out here since I am not using mongo.

Basically I have a report_controller.rb that has a very simple method defined:

def donations_by_season
  @donations = Donation    
end

and a very simple report/donations_by_season.html.erb as follows:

<%= form_for @donations do |f| %>
  Stuff Will go here... such as fields to select a date for the season we wish to view.
<% end %>

There is no report model, just a controller and views.

But when I attempt to view /reports/donations_by_season I immediately get:

undefined method to_key' for #<Class:0x00000114d85918>

What should I do to fix that? Am I doing my form incorrectly since there is no model associated with reports?

---

You should never be assigning an instance variable to point to a class object like this. You probably want this:

def donations_by_season
  @donations = Donation.all
end

Note the .all versus just leaving it blank. You could also do .new or a litany of other methods, depending on what you're trying to do.