Unable to create a REST API for my RoR app - ruby-on-rails

Question

I am trying to create a REST API for my app.
The map.connect_resource :book causes the following error, when executing rake test:functionals:
Error: undefined local variable or method `map' for #
<ActionDispatch::Routing::Mapper:0x8a11e74>.
In my app, I'm trying to implement RoR with MySQL with the following table data.
Table Name: Object
Fields: object_id, Object_name, Object_description etc...
I would like to create a REST API object for querying the above database and retrieving the data. What's the best way to proceed?

Answer 1

That is a reallyyyyyyy old tutorial (from 6 years ago!!!). I would recommend reading this guide instead: http://guides.rubyonrails.org/routing.html
Assuming you are running Rails 3, you should just put this in your routes.rb file:
resources :books
That will expose routes for your BooksController so you can access:
HTTP Verb Path action used for
-----------------------------------------------------------------------
GET /books index display a list of all books
GET /books/new new return an HTML form for creating a new book
POST /books create create a new book
GET /books/:id show display a specific book
GET /books/:id/edit edit return an HTML form for editing a book
PUT /books/:id update update a specific book
DELETE /books/:id destroy delete a specific book
So in your BooksController you would then have:
class BooksController < ApplicationController
# GET /books
# GET /books.xml
def index
#books = Book.all
respond_to do |format|
format.html # index.html.erb
format.xml { render :xml => #books }
end
end
# GET /books/1
# GET /books/1.xml
def show
#book = Book.find(params[:id])
respond_to do |format|
format.html # show.html.erb
format.xml { render :xml => #book }
end
end
# GET /books/new
# GET /books/new.xml
def new
#book = Book.new
respond_to do |format|
format.html # new.html.erb
format.xml { render :xml => #book }
end
end
# GET /books/1/edit
def edit
#book = Book.find(params[:id])
end
# POST /books
# POST /books.xml
def create
#book = Book.new(params[:book])
respond_to do |format|
if #book.save
format.html { redirect_to(#book, :notice => 'Book was successfully created.') }
format.xml { render :xml => #book, :status => :created, :location => #book }
else
format.html { render :action => "new" }
format.xml { render :xml => #book.errors, :status => :unprocessable_entity }
end
end
end
# PUT /books/1
# PUT /books/1.xml
def update
#book = Book.find(params[:id])
respond_to do |format|
if #book.update_attributes(params[:book])
format.html { redirect_to(#book, :notice => 'Book was successfully updated.') }
format.xml { head :ok }
else
format.html { render :action => "edit" }
format.xml { render :xml => #book.errors, :status => :unprocessable_entity }
end
end
end
# DELETE /books/1
# DELETE /books/1.xml
def destroy
#book = Book.find(params[:id])
#book.destroy
respond_to do |format|
format.html { redirect_to(books_url) }
format.xml { head :ok }
end
end
end