ActionController::UnknownFormat for respond_with

Question

I have returned to my ruby on rails project to find that I am getting:

ActionController::UnknownFormat

error for a very simple line of code:

    respond_with(allMatches)

The allMatches hash is defined as:

        allMatches = {  "matchesProposed"   => proposedMatchAndNeedsActionObjects,
                        "matchesReceived"   => receivedMatchAndNeedsActionObjects,
                        "scheduledMatches"  => scheduledMatches}

I have declared at the class level:

class HomeController < ApplicationController

  respond_to :json

The code has been functioning just fine, until today - no changes! Any thoughts?

Answer 1

The error ActionController::UnknownFormat is raised when there is a request in a format that is not specified in respond_to or respond_with .

Since you did not provide any further information and just minimal code examples, you will have to keep digging yourself .