What is the main difference between PATCH and PUT request?

Question

I am using a PUT request in my Rails application. Now, a new HTTP verb, PATCH has been implemented by browsers. So, I want to know what the main di

Answer 1

I spent couple of hours with google and found the answer here

PUT => If user can update all or just a portion of the record, use PUT (user controls what gets updated)

PUT /users/123/email
new.email@example.org

PATCH => If user can only update a partial record, say just an email address (application controls what can be updated), use PATCH.

PATCH /users/123
[description of changes]

Why Patch

PUT method need more bandwidth or handle full resources instead on partial. So PATCH was introduced to reduce the bandwidth.

Explanation about PATCH

PATCH is a method that is not safe, nor idempotent, and allows full and partial updates and side-effects on other resources.

PATCH is a method which enclosed entity contains a set of instructions describing how a resource currently residing on the origin server should be modified to produce a new version.

PATCH /users/123
[
  { "op": "replace", "path": "/email", "value": "new.email@example.org" }
]

Here more information about put and patch