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


so many variables , conventions in rails similar me. if isn't working , suspect particular variable culprit, might change from

variable

to

@variable

or might change

product_id

to

product.id

i'm shooting in dark, though. don't know used where, , i'd know key concepts.

variable

could local variable or method in current scope.

@variable

is instance variable, instance variables in other class.

product_id

is again local variable or method in current scope.

and last one:

product.id

product local variable or method , call id method on it. should invest more time trying learn ruby before trying use rails.


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