Initial commit

app/controllers/api/user_token_controller.rb

@@ -0,0 +1,36 @@
+class Api::UserTokenController < Knock::AuthTokenController
+  skip_before_action :verify_authenticity_token
+
+  rescue_from Exception, :with => :return_error
+
+  # Catch exception and return JSON-formatted error
+  def return_error(exception)
+    logger.error "==Handled======="
+    logger.error exception.message
+    logger.error exception.backtrace.join("\n")
+    logger.error "==Handled=======" 
+    case exception
+    when ActiveRecord::RecordNotFound
+      @status = 404
+      @message = 'Record not found'
+    when ActiveRecord::RecordInvalid
+      @status = 422
+      @message = 'Record invalid'
+    when ArgumentError
+      @status = 400
+      @message = 'Argument Error'
+    else
+      @status = 500
+      @message = 'Internal Error'
+    end
+
+    # for some reason render json_errors is not working
+    # simulating JSON API support 
+    render json: { 
+      errors: [{
+        status: @status.to_s,
+        title: @message
+      }]
+    }
+  end
+end