I am trying to get all picklist values from a field in salesforce using REST API. Is it possible to do that? If it is then how it can be done?
You can get all picklist values from a field using REST API by doing the following:
Access resource similar to this: /services/data/v26.0/sobjects/Opportunity/describe (use whichever object you want) and the JSON response will contain fields node:
/services/data/v26.0/sobjects/Opportunity/describe
fields