ruby - link_to works, but not button_to with parameter to pass -

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i have link_to trying convert button. not sure how pass parameter plan_id in button_to call. per other threads on this, have used :get method inside button_to call.

works:

<%= link_to "sign up", new_subscription_path(:plan_id => plan.id) %>

does not plan_id passed :

<%= button_to "sign up", new_subscription_path(:plan_id => plan.id) , :class => "btn btn-primary  btn-large", :method => :get %>

please can tell me wrong?

<%= link_to "sign up",new_subscription_path(:plan_id => plan.id),{ class:"btn btn-primary btn-large"} %>

it make link button.


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