Question

i have a helper function which renders a partial and i pass a variable called method with it into the view…

when in view i use

<%= friend.method.profile.picture %>

the method variable can be either user or friend

and i get

wrong number of arguments(0 for 1)

i suppose there is a problem how i use the variable being passed into the association call… maybe i have to escape it somehow?

Answer 1

If I understand what you want, you are trying to dynamically call a function based on the value of a string argument called ‘method’. Also, ‘method’ is an existing function in Ruby, (hence your error message about ‘wrong number of args’ vs ‘undefined method’), so I would recommend renaming it in your code.

TLDR:

1. Rename your variable something like "person" (instead of ‘method’), then

2. try some meta-programming to call the function using send:

   friend.send(person).profile.picture