Question

I have a drop down in a visualforce page . The data needs to populated from a rails app that i have developed.So how should i populated the options from the rails site into my visualforce page

Answer 1

One approach is

1. Return XML from RoR url
2. Add external site to salesforce instance (Setup | Security Controls | Remote Site Setting)
3. Use HttpRequest / HttpResponse to ask for and receive xml from RoR.
4. Use XML DOM support to parse and extract info (see example)