create a web service in RoR to access DB

[PC Leung]

Hi All

Is anyone working on creating a web service in RoR?

how to create a web service in RoR to access database?

so that it can be called by an Android App?

anyone can give me a guidance?

thanks in advance

[Aaron Valade]

Check out the rails-api project [1] and watch the rails-api RailsCast [2]

- A

1. https://github.com/rails-api/rails-api

2. http://railscasts.com/episodes/348-the-rails-api-gem

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[Francis Chong]

Unless you already have a rails site, you might want to consider using a simpler framework like Sinatra. 

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[Greg Moreno]

Also take a look at grape  https://github.com/intridea/grape

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[PC Leung]

Any code sample of web service built by sinatra ? Can it be called by JSON ?
Is it popular?
Thanks

[Matthew Rudy Jacobs]

How about this one?

https://www.google.com.hk/search?q=sinatra+json+api

Or this http://nathanhoad.net/how-to-return-json-from-sinatra

[Francis Chong]

Matthew, use lmgtfy.com next time ;)

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[Matthew Rudy Jacobs]

yeah, I have to avoid being too rude

:)

[Paul Gresham]

It's already built into rails. If you're using rails3 and you have a model (lets say you have User) you can simply try localhost:3000/users.json and you will get a json response. If you have a user with ID = 5 then you can use localhost:3000/users/5.json

You can also use Curl or a similar tool to test. With Curl you can POST, UPDATE and DELETE. Have a look for RESTful interfaces. 

To know if json will work with your controller, you should see something like this in apps/controllers/user_controller.rb

  def show

    @user = User.find(params[:id])

    respond_to do |format|

      format.html # show.html.erb

      format.json { render json: @user }

    end

  end

[PC Leung]

many thanks. 

In android, the app captures username and password,

then JSON in RoR returns a code to check login successfulness.

can the JSON in rails provide a login service?

e.g. http://localhost:3000/users/login/xxx.json?username=xx;passwd=xx

how can the JSON in rails return a code (e.g. 0 or 1) ? thanks

[Steve Holmes]

Hi PC

These questions are really basic and many answers can be found on google.

Can I suggest you join the General Assembly Ruby training course? Which should give you a good grounding.

Or consider hiring someone who has coding experience?

If you wish to code web stuff in ruby, you really need to get a grasp of the basics and sending multiple questions on basic things to the list is not the way to progress.

Cheers

Steve

[David Lawton]

Well said. 

Much better than what my response was about to be.....

"I am not able to rightly apprehend the kind of confusion of ideas that could provoke such a question." -- Charles Babbage

[David Lawton]

As for the clear text username and password....

http://replygif.net/586

Please google for API security and best practices also. 

"I am not able to rightly apprehend the kind of confusion of ideas that could provoke such a question." -- Charles Babbage