CODEWITHSUNDEEP
rubyruby-on-rails-3
David West
David West

Reputation: 2328

Learning rails. Differences between, for instance, product, :product, @product, product.id, product_id

So many variables and conventions in rails look so similar to me. If something isn't working and I suspect a particular variable is the culprit, I might change it from

variable

to

@variable

or I might change

product_id

to

product.id

I'm really just shooting in the dark, though. I don't know exactly what is used where, and I'd really like to know the key concepts.

Upvotes: 1

Views: 74

Answers (1)

Maurício Linhares
Maurício Linhares

Reputation: 40333

variable

Could be a local variable or a method in the current scope.

@variable

Is an instance variable, like any instance variables in any other class.

product_id

Is again a local variable or method in the current scope.

And the last one:

product.id

product could be a local variable or method and then you call the id method on it. You should probably invest more time trying to learn Ruby before trying to use Rails.

Upvotes: 2

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