How can I add localhost:3000 to Facebook App for development

Question

I am working on a Rails 4 app. On my laptop, development is done at localhost:3000. The actual domain of the site is roomidex.com.

How can I set up a Facebook app so it works on production and development?

Here is the current configuration:

App Domains: roomidex.com  Website With Facebook Login:  Site URL: http://www.roomidex.com 

When I try to do a Facebook login on localhost:3000, I get this not surprising error:

{    "error": {       "message": "Invalid redirect_uri: Given URL is not allowed by the Application configuration.",       "type": "OAuthException",       "code": 191    } } 

Answer 1

On the Facebook App page, click "edit App" then click "Advanced" in the left-hand navigation. Then for "Valid OAuth redirect URIs" add http://localhost:3000... or whatever you want the accepted redirect to be.