REST URI convention - Singular or plural name of resource while creating it

Question

I\'m new to REST and I\'ve observed that in some RESTful services they use different resource URI for update/get/delete and Create. Such as

• Create - using

Answer 1

An id in a route should be viewed the same as an index to a list, and naming should proceed accordingly.

numbers = [1, 2, 3]

numbers            GET /numbers
numbers[1]         GET /numbers/1
numbers.push(4)    POST /numbers
numbers[1] = 23    UPDATE /numbers/1

But some resources don't use ids in their routes because there's either only one, or a user never has access to more than one, so those aren't lists:

GET /dashboard
DELETE /session
POST /login
GET /users/{:id}/profile
UPDATE /users/{:id}/profile