= form_for(@post, html: { role: "form" }) do |f|
  - if @post.errors.any?
    #error_explanation
      %h2
        = pluralize(@post.errors.size, "error")
        prohibited this post from being saved:
      %ul
        - @post.errors.full_messages.each do |msg|
          %li= msg

  .form-group
    = label_tag :post, "Subject", class: 'control-label'
    = f.text_field :subject, class: 'form-control', autofocus: 'autofocus', maxlength: 255

  .form-group
    - if @post.forum || @forum
      = label_tag :body, "What's up?", class: 'control-label'
    - else
      = label_tag :body, "What's going on in your food garden?"
    = f.text_area :body, rows: 12, class: 'form-control'
    %span.help-block
      = render partial: "shared/markdown_help"

  - if @post.forum || @forum
    - forum = @post.forum || @forum
    %p
      This post will be posted in the forum
      = link_to forum.name, forum
    .field
      = f.hidden_field :forum_id, value: forum.id

  = f.submit "Post", class: 'btn btn-primary'