update field from a link_to in rails 4 - ruby-on-rails

Question

I just need a link_to link that automatically updates a value.
I have done the following:
1) Added the field i want to update into the post_controller permit list:
#post_controller.rb
def post_params
params.require(:post).permit(:title, :description, :file, :user_id, :category_id, :revisor_id, :visible)
end
2) Added the link_to link in the view:
<td><%= link_to 'Publish', post_path(post, visible: true), method: :put %></td>
any idea what im doing wrong?
#routes.rb
resources :posts do
get 'revisions', on: :collection
end
the error i'm getting is:
param is missing or the value is empty: post
Here is the controller:
#posts_controller.rb
class PostsController < ApplicationController
before_action :set_post, only: [:show, :edit, :update, :destroy]
# GET /posts
# GET /posts.json
def index
#posts = Post.all
end
def revisions
#posts = Post.where(revisor_id: current_user.id)
end
# GET /posts/1
# GET /posts/1.json
def show
end
# GET /posts/new
def new
#post = Post.new
end
# GET /posts/1/edit
def edit
end
# POST /posts
# POST /posts.json
def create
#post = Post.new(post_params)
#post.visible = true
#post.user_id = current_user.id
#petition = Petition.new(user_id: current_user.id, category_id: #post.category_id, status: "New")
#petition.save
respond_to do |format|
if #post.save
format.html { redirect_to #post, notice: 'Post was successfully created.' }
format.json { render :show, status: :created, location: #post }
else
format.html { render :new }
format.json { render json: #post.errors, status: :unprocessable_entity }
end
end
end
# PATCH/PUT /posts/1
# PATCH/PUT /posts/1.json
def update
respond_to do |format|
if #post.update(post_params)
format.html { redirect_to #post, notice: 'Post was successfully updated.' }
format.json { render :show, status: :ok, location: #post }
else
format.html { render :edit }
format.json { render json: #post.errors, status: :unprocessable_entity }
end
end
end
# DELETE /posts/1
# DELETE /posts/1.json
def destroy
#post.destroy
respond_to do |format|
format.html { redirect_to posts_url, notice: 'Post was successfully destroyed.' }
format.json { head :no_content }
end
end
private
# Use callbacks to share common setup or constraints between actions.
def set_post
#post = Post.find(params[:id])
end
# Never trust parameters from the scary internet, only allow the white list through.
def post_params
params.require(:post).permit(:title, :description, :file, :user_id, :category_id, :revisor_id, :visible)
end
end
Here is the view:
#revisions.html.erb
<h1>Pending for revision</h1>
<table>
<thead>
<tr>
<th>Title</th>
<th>Description</th>
<th>User</th>
<th>Category</th>
<th>Revisor</th>
<th colspan="3"></th>
</tr>
</thead>
<tbody>
<% #posts.pending_posts.each do |post| %>
<tr>
<td><%= post.title %></td>
<td><%= post.description %></td>
<td><%= post.user_id %></td>
<td><%= post.category_id %></td>
<% if !post.revisor_id %>
<td> No asignado </td>
<% else %>
<td><%= post.revisor_id %></td>
<% end %>
<td><%= link_to 'Publish', post_path(post, visible: true), method: :put %></td>
<!--<td><%#= link_to 'Edit', edit_petition_path(petition) %></td>-->
<!--<td><%#= link_to 'Destroy', petition, method: :delete, data: { confirm: 'Are you sure?' } %></td>-->
</tr>
<% end %>
</tbody>
</table>
Here is the model:
#post.rb
class Post < ActiveRecord::Base
belongs_to :category
belongs_to :user
has_one :petition
scope :my_revisions, ->(user){ where("posts.user_id = ?", user.id)}
scope :visible_posts, -> {where(visible: true)}
scope :pending_posts, -> {where(visible: false)}
end
SERVER LOG:
Started PUT "/posts/12?visible=true" for 127.0.0.1 at 2014-07-16 10:07:31 +0100
Processing by PostsController#update as HTML
Parameters: {"authenticity_token"=>"authenticitytoken=", "visible"=>"true", "id"=>"12"}
Post Load (0.2ms) SELECT "posts".* FROM "posts" WHERE "posts"."id" = ? LIMIT 1 [["id", 12]]
Completed 400 Bad Request in 2ms
ActionController::ParameterMissing (param is missing or the value is empty: post):
app/controllers/posts_controller.rb:79:in `post_params'
app/controllers/posts_controller.rb:51:in `block in update'
app/controllers/posts_controller.rb:50:in `update'
Rendered /home/kbs23/.rvm/gems/ruby-2.1.0#global/gems/actionpack-4.1.2/lib/action_dispatch/middleware/templates/rescues/_source.erb (0.6ms)
Rendered /home/kbs23/.rvm/gems/ruby-2.1.0#global/gems/actionpack-4.1.2/lib/action_dispatch/middleware/templates/rescues/_trace.html.erb (1.5ms)
Rendered /home/kbs23/.rvm/gems/ruby-2.1.0#global/gems/actionpack-4.1.2/lib/action_dispatch/middleware/templates/rescues/_request_and_response.html.erb (1.0ms)
Rendered /home/kbs23/.rvm/gems/ruby-2.1.0#global/gems/actionpack-4.1.2/lib/action_dispatch/middleware/templates/rescues/diagnostics.erb within rescues/layout (13.7ms)
Here are my routes:
#rake routes
revisions_posts GET /posts/revisions(.:format) posts#revisions
posts GET /posts(.:format) posts#index
POST /posts(.:format) posts#create
new_post GET /posts/new(.:format) posts#new
edit_post GET /posts/:id/edit(.:format) posts#edit
post GET /posts/:id(.:format) posts#show
PATCH /posts/:id(.:format) posts#update
PUT /posts/:id(.:format) posts#update
DELETE /posts/:id(.:format) posts#destroy

Answer 1

I finally got to fix this by just changing the link from:
<td><%= link_to 'Publish', post_path(post, visible: true), method: :put %></td>
to this:
<td><%= link_to 'Publish', post_path(post, post: {visible: :true}), method: :put %></td>