Thanks for helping Dave

The problem was not really in my code.
The problem appear when there's a redirection on the website. 
(.htaccess)

When it's the case i lost my data and i'm not on the page i supposed to 
be.
So it's normal that when i seach for @form the result is nil

I added some code, to see i there's a redirection on the webpage and it 
works now

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