Nested Resource Rails - ruby-on-rails

Question

I have two models namely todo and tasks. Have set up a Has_many, Belongs_to assosciation between them (todo has many tasks, task belongs to todo).
I have set up a nested resource between them as shown below in my routes file
resources :todos do
resources :tasks
end
My form for creating new task is as shown below:
<%= form_for([#todo, #task], html:{class:'form-horizontal'}) do |f| %>
<% if #task.errors.any? %>
<div id="error_explanation">
<h2><%= pluralize(#task.errors.count, "error") %> prohibited this todo from being saved:</h2>
<ul>
<% #task.errors.full_messages.each do |message| %>
<li><%= message %></li>
<% end %>
</ul>
</div>
<% end %>
<script type="text/javascript">
$(document).ready(function () {
$('#datep').on('change', function () {
$('.datepicker').hide();
});
});
</script>
<div class="container">
<table style="width:70%" class="table">
<tr>
<td><%= f.label :title , "Task Title"%>
<%= f.text_field :title,:class=>'form-control input-sm' %></td>
</tr>
<tr>
<td><%= f.label :description,"Task Description"%>
<%= f.text_field :description,:class=>'form-control input-sm' %></td>
</tr>
<tr>
<td><%= f.label :deadline,"Task DeadLine"%>
<h id="datep"><%= f.text_field :deadline, :class=>'form-control input-sm', "data-provide" => "datepicker" ,"data-date-format" => "mm-dd-yyyy"%></h></td>
</tr>
<tr>
<td><%= f.label :assignee,"Task Assignee" %><br/>
<%= f.collection_select :assignee, User.all, :name, :name, {}, :class => "btn btn-default dropdown-toggle"%></td>
</tr>
<tr>
<td><%= f.label :tags,"Tags for Task"%>
<%= f.text_field :tags,:class=>'form-control input-sm' %></td>
</tr>
<tr>
<td><%= f.label :state,"Task Status"%><br/>
<%= f.select :state, ['Yet To Start', 'In Progress', 'Finished'], {}, :class => "btn btn-default dropdown-toggle"%></td>
</tr>
</table>
</div>
<br />
<div class="actions form-group">
<div class="container">
<%= f.submit 'Create New Task', class:'btn btn-success'%>
<%= link_to todos_path, class: 'btn btn-warning' do %>
<i class="glyphicon glyphicon-hand-left"></i> Back To List
<% end %>
</div>
</div>
<% end %>
My tasks controller code is shown below:
class TasksController < ApplicationController
def new
#task = Task.new
end
def create
#todo = Todo.find.(params[:todo_id])
#task = #todo.tasks.build(task_params)
if #task.save
redirect_to [#todo, #task]
else
redirect_to root_path
end
end
private
def set_todo
#todo = Todo.find(params[:todo_id])
end
def task_params
params.require(:task).permit(:assignee, :deadline, :state, :tags, :title, :description)
end
end
However when i want to add a new task to an particular todo i get this error saying
undefined method `tasks_path' for #<#<Class:0x007fd16a9c8810>:0x007fd169c95a80>
Did you mean? asset_path
Need help to know what am I doing wrong here???

Answer 1

redirect_to only accepts hash, record or string so this line redirect_to [#todo, #task] won't work. See http://api.rubyonrails.org/classes/ActionController/Redirecting.html. You can change it to redirect_to todo_tasks_path(#todo) which is reasonable here.
I also just noticed you didn't put before_filter :set_todo in the controller. You can remove #todo = Todo.find.(params[:todo_id]) in create action as it's no longer needed.
Hope it helps.