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PORails Pass Parameters Via URL
 

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    <p>I am trying to implement searching in my rails app. I have a <code>User</code> model where each user has an <code>id</code> and a <code>facebook_id</code>.</p> <p>How can I implement searching by <code>facebook_id</code>? I was looking to call something like this: <code>localhost:3000/users.json?facebook_id=123456</code>.</p> <p>Thanks!</p> <p><strong>Edit</strong>: I tried a conditional index, but received an error "We're sorry, but something went wrong."</p> <p>This was my code:</p> <pre><code> def index if params[:facebook_id] respond_with User.find(params:facebook_id) elsif params[:twitter_id] respond_with User.find(params:twitter_id) else respond_with User.all end end </code></pre> <p>Rails log:</p> <pre><code>2012-08-07T19:43:11+00:00 app[web.1]: Started GET "/users.json?facebook_id=1" for 173.247.200.7 at 2012-08-07 19:43:11 +0000 2012-08-07T19:43:11+00:00 app[web.1]: Processing by UsersController#index as JSON 2012-08-07T19:43:11+00:00 app[web.1]: Parameters: {"facebook_id"=&gt;"1"} 2012-08-07T19:43:11+00:00 app[web.1]: Completed 500 Internal Server Error in 2ms 2012-08-07T19:43:11+00:00 app[web.1]: 2012-08-07T19:43:11+00:00 app[web.1]: NameError (undefined local variable or method `facebook_id' for #&lt;UsersController:0x000000044b6e38&gt;): 2012-08-07T19:43:11+00:00 app[web.1]: app/controllers/users_controller.rb:4:in `index' </code></pre> <p><strong>Edit2</strong>: After changing the params from <code>params:facebook_id</code> to <code>params[:facebook_id]</code> I received another error. Here is a copy of my rails log.</p> <pre><code>2012-08-07T19:53:45+00:00 app[web.1]: Started GET "/users.json?facebook_id=1000" for 173.247.200.7 at 2012-08-07 19:53:45 +0000 2012-08-07T19:53:45+00:00 app[web.1]: Processing by UsersController#index as JSON 2012-08-07T19:53:45+00:00 app[web.1]: Parameters: {"facebook_id"=&gt;"1000"} 2012-08-07T19:53:45+00:00 app[web.1]: Completed 500 Internal Server Error in 2ms 2012-08-07T19:53:45+00:00 app[web.1]: 2012-08-07T19:53:45+00:00 app[web.1]: ActiveRecord::RecordNotFound (Couldn't find User with id=1000): 2012-08-07T19:53:45+00:00 app[web.1]: app/controllers/users_controller.rb:4:in `index' </code></pre>
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