rails processing question

I'm pretty n开发者_如何转开发ew to rails and I got this error. what does this mean:

Processing by ExamplesController#update as */*

mean? Does this message prevent the update action in ExamplesController from running?

When an HTTP request is made it specifies the Accept header to specify what format it would like the response to be. Rails will attempt to honor this via the respond_to construct. Additionally, Rails supports the ability to specify the desired response format via the url, by appending .json to a URL for instance.

For a generic HTTP request most HTTP clients will specify an Accept: */* which is what you are seeing in the Processing line. If you had specified either Accept: application/json or http://foo.com/bar.json then you'd see something like:

Processing by ExamplesController#update as JSON