Trying to manually recreate a simple generate/scaffolding script

I'm trying to understand Rails from the ground up. I want to learn how to 开发者_开发问答manually create basic show-all/show-single/CRUD functionality in the framework.

I currently am working on the display-all functionality, but am stopped by an error when I try to request all items in the Products db

Here are the steps I've taken so far:

1. script/generate controller Products
2. script/generate model Products
3. rake db:migrate
4. modified products_controller.rb to add: def index() { @products = Product.all}
5. (error: uninitialized constant ProductsController::Product)
6. ideally, dump all orders in the view

What's the fix?

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When you generate your model you should be using either the lower case plural version or the Camel case singular.

so script/generate model Product or script/generate model product

In summary a model Product lives in app/models/product.rb and uses a database table products. When you have multi-word model names such as OrderItem this lives in app/models/order_item and uses a database table called order_items

Your original question also does not show any columns added when the model generator was run, I assume you have left those out for conciseness. Otherwise you may have a table with very few columns.