How to call one model form field into another controller index? - ruby-on-rails

Question

Todos Controller
class TodosController < ApplicationController
# GET /todos
# GET /todos.json
def index
#todos = Todo.all
#projects = Project.new
respond_to do |format|
format.html # index.html.erb
format.json { render :json => #todos }
end
end
# GET /todos/1
# GET /todos/1.json
def show
#todo = Todo.find(params[:id])
respond_to do |format|
format.html # show.html.erb
format.json { render :json => #todo }
end
end
# GET /todos/new
# GET /todos/new.json
def new
#todo = Todo.new
respond_to do |format|
format.html # new.html.erb
format.json { render :json => #todo }
end
end
# GET /todos/1/edit
def edit
#todo = Todo.find(params[:id])
end
# POST /todos
# POST /todos.json
def create
#todo = Todo.new(params[:todo])
respond_to do |format|
if #todo.save
format.html { redirect_to(#todo, :notice => 'Todo was successfully created.') }
format.json { render :json => #todo, :status => :created, :location => #todo }
else
format.html { render :action => "new" }
format.json { render :json => #todo.errors, :status => :unprocessable_entity }
end
end
end
# PUT /todos/1
# PUT /todos/1.json
def update
#todo = Todo.find(params[:id])
respond_to do |format|
if #todo.update_attributes(params[:todo])
format.html { redirect_to(#todo, :notice => 'Todo was successfully updated.') }
format.json { render :json => {} }
else
format.html { render :action => "edit" }
format.json { render :json => #todo.errors, :status => :unprocessable_entity }
end
end
end
# DELETE /todos/1
# DELETE /todos/1.json
def destroy
#todo = Todo.find(params[:id])
#todo.destroy
respond_to do |format|
format.html { redirect_to(todos_url) }
format.json { render :json => {} }
end
end
def newproject
#projects = Project.all
end
end
Todos_form.html.erb
<%= form_for(#todo) do |f| %>
<% if #todo.errors.any? %>
<div id="error_explanation">
<h2><%= pluralize(#todo.errors.count, "error") %> prohibited this todo from being saved:</h2>
<ul>
<% #todo.errors.full_messages.each do |msg| %>
<li><%= msg %></li>
<% end %>
</ul>
</div>
<% end %>
<div class="field">
<%= f.label :content %><br />
<%= f.text_field :content %>
</div>
<div class="actions">
<%= f.submit %>
</div>
<% end %>
projects_form.html.erb
<%= form_for(#project) do |f| %>
<% if #project.errors.any? %>
<div id="error_explanation">
<h2><%= pluralize(#project.errors.count, "error") %> prohibited this project from being saved:</h2>
<ul>
<% #project.errors.full_messages.each do |msg| %>
<li><%= msg %></li>
<% end %>
</ul>
</div>
<% end %>
<div class="field">
<%= f.label :name %><br />
<%= f.text_area :name %>
</div>
<div class="field">
<%= f.label :project_id %><br />
<%= f.number_field :project_id %>
</div>
<div class="actions">
<%= f.submit %>
</div>
<% end %>
project.rb
class Project < ActiveRecord::Base
attr_accessible :name, :project_id
has_many :todos
def as_json(options = {})
super(options.merge(:only => [ :id, :name, :project_id]))
end
end
todo.rb
class Todo < ActiveRecord::Base
attr_accessible :content, :order, :done
belongs_to :project
def as_json(options = {})
super(options.merge(:only => [ :id, :content, :order, :done ]))
end
end
Hi I have two models Todos and Projects, in Todos index i want to show projects field values. How it is possible help me how to proceed it.
And i need Associations also.
Note: The field values must be comes from project controller and save it Database.

Answer 1

First project model should not have project_id column. project_id should be present in the todo model.
Then change your routes.
resources :projects do
resources :todos
end
Now add the code to project controller.
class ProjectsController < ApplicationController
def index
#projects = Project.all
end
def show
#project = Project.find(params[:id])
#todos = #project.todos.all
end
def new
#project = Project.mew
end
def create
#project = Project.new(params[:project])
if #project.save
.....
else
....
end
end
end
Individual project contains its own todos. So that in project show page you can display all the todos associated with the project.
Now the todo controller should be look like:
class TodosController < ApplicationController
def new
#project = Project.find(params[:project_id])
#todo = #project.todos.new
end
def create
#project = Project.find(params[:project_id])
#todo = #project.todos.build(params[:todo])
if #todo.save
.....
else
....
end
end
def show
#project = Project.find(params[:project_id])
#todo = #project.todos.find(params[:id])
end
end
Finally in app/views/projects/new.html.erb file add the following code:
<%= form_for #project do |f| %>
<% if #project.errors.any? %>
<div id="error_explanation">
<h2><%= pluralize(#project.errors.count, "error") %> prohibited this project from being saved:</h2>
<ul>
<% #project.errors.full_messages.each do |msg| %>
<li><%= msg %></li>
<% end %>
</ul>
</div>
<% end %>
<div class="field">
<%= f.label :name %><br />
<%= f.text_area :name %>
</div>
<div class="actions">
<%= f.submit %>
</div>
<% end %>
And in app/views/todos/new.html.erb add the code:
<%= form_for #todo, url: project_todos_path(#project), method: :post do |f| %>
<% if #todo.errors.any? %>
<div id="error_explanation">
<h2><%= pluralize(#todo.errors.count, "error") %> prohibited this todo from being saved:</h2>
<ul>
<% #todo.errors.full_messages.each do |msg| %>
<li><%= msg %></li>
<% end %>
</ul>
</div>
<% end %>
<div class="field">
<%= f.label :content %><br />
<%= f.text_field :content %>
</div>
<div class="actions">
<%= f.submit %>
</div>