Question

I would like to render partials into a view based on conditions. At first I have this view which renders well

<%= simple_form_for [@customer, @reading], :html => { :class => 'form-horizontal' } do |f|             %>
<%= f.input :customer_id, :editable => false, :value => @customer.id %>
<%= f.input :date_of_reading, :as => :date %>
<%= render 'readings/single_phase', f: f %>
<% end %>

I now want to render partials into the view based on conditions. So i create a helper method in application.rb to do the conditional checking

module ApplicationHelper
 def render_readings_conditionally
  if @customer.phase_type == 'Single Phase'
  render :partial => 'readings/single_phase'
else
  render :partial => 'readings/three_phase'
end 
end
end

And in my view, I fix the method in there

<%= simple_form_for [@customer, @reading], :html => { :class => 'form-horizontal' } do    |f| %>
<%= f.input :customer_id, :editable => false, :value => @customer.id %>
<%= f.input :date_of_reading, :as => :date %>
<%= render_readings_conditionally %>
 <% end %>

However, this will not work because I have not passed the block argument i had earlier on to my partials.

How can i pass it to my partials?

Answer 1

Just rewrite it this way :

def render_readings_conditionally(form)
  if @customer.phase_type == 'Single Phase'
    render 'readings/single_phase', f: form
  else
    render 'readings/three_phase', f: form
  end 
end

And in your view :

<%= render_readings_conditionally(f) %>