view spec fails with “Query does not return ResultSet”

问题

Just trying to do a simple view spec. When I first create this spec and run it, it worked great. But later on when I needed to create the model class (app/models/request.rb) it starts failing with the following error:

Failure/Error: render ActionView::Template::Error: query does not return ResultSet

Here is my view spec:

require 'spec_helper'

describe "requests/new.html.erb" do   

  it "renders a form to reate a request" do  
    assign(:request, mock_model("Request"))  
    render
    rendered.should have_selector("form",
      :method => "post",
      :action => requests_path
    ) do |form|
      form.should have_selector("input",:type=>"submit")
    end
  end
end

Here is the view:

<%= form_for @request do |f| %>
  <%= f.submit "Submit" %>
<% end %>

I can't seem to track down what is wrong and Google offers no help.

回答1:

It appears it was a problem that there was no active migration for the model. Beginner mistake.

来源：https://stackoverflow.com/questions/5836014/view-spec-fails-with-query-does-not-return-resultset