I am trying to Submit a form using get method. Earlier I was trying a similar thing with form_tag and it was working but now when I changed to a form_for tag, this doesn't seem to work.
<%- filter_path = params[:action] == "index" ? posts_path : sneak_peek_posts_path %>
<%= form_for(@post_filter, :url=> filter_path, :method => :get) do |f| %>
I get a no routes error.
You can pass the raw HTML attributes using :html if you need to. For Rails 3:
<%= form_for(@post_filter, :url=> filter_path, :html => { :method => 'GET' }) do |f| %>
Update and in Rails 4, per @andre.orvalho's suggestion below, the method parameter can be supplied directly:
<%= form_for(@post_filter, url: filter_path, method: :get ) do |f| %>
Did you try
<%= form_for(@post_filter, :url=> filter_path, :html => {:method => :get}) do |f| %>
来源：https://stackoverflow.com/questions/9742417/using-form-for-tag-with-get-method