My first Rails example using model and I got this NameError:
NameError in VandaController#att
uninitialized constant VandaController::Compute
Same code works fine if I don't create the Compute object.
What did I do wrong?
Here is the Controller
class VandaController < ApplicationController
def att
@compute = Compute.new
@data1 = @compute.cmpt
end
end
Here is the Model
class Compute
def cmpt
return 5
end
end
And here is the view
<html>
<head>
<title>Model</title>
</head>
<body>
<h1>reading data from a model</h1>
<br>
<br>
Fetch : <%= @data1 %> from Compute model.
<br>
</body>
</html>
> On Nov 28, 1:49 pm, packat <cpete...@gmail.com> wrote:> My first Rails example using model and I got this NameError:
> > NameError in VandaController#att
> > uninitialized constant VandaController::Compute
> Is the model in compute.rb in app/models or lib ?
It is in app/models.
The important thing was whether the file was called compute.rb
I am following a book "Beginning Ruby on Rails" by Steven Holzner.
That book may be based on older version. Mine is 1.8.6
The important thing would be the rails version, not the ruby version.
and now get a different error:
ActiveRecord::StatementInvalid in VandaController#att
Mysql::Error: Table 'orchids.computes' doesn't exist: SHOW FIELDS FROM
`computes`
Apparently, a schema is created for Compute and Ruby thought ther is a
Compute table in the database.
So this is not helping any.
It would have created a migration to add that table but it would not
have run it. You can run it with
rake db:migrate
