[Solved] Which of the following is the correct JSON syntax for a HAL link to a 'self' resource? — Ans: "_links": { "self": { "href": "/orders/123" } } | Rest API

Rest API - HATEOAS and Linking

Which of the following is the correct JSON syntax for a HAL link to a 'self' resource?

A"_links": { "self": { "href": "/orders/123" } }

B"_links": { "self": "/orders/123" }

C"_links": { "href": { "self": "/orders/123" } }

D"_links": { "self": ["/orders/123"] }

Step-by-Step Solution

Solution:

Step 1: Recall HAL link syntax
HAL requires links to be objects with an href property inside _links. So "self": { "href": "/orders/123" } is correct.
Step 2: Check other options for syntax errors
"_links": { "self": "/orders/123" } uses a string directly instead of an object. "_links": { "href": { "self": "/orders/123" } } reverses keys incorrectly. "_links": { "self": ["/orders/123"] } uses an array which is invalid here.
Final Answer:
"_links": { "self": { "href": "/orders/123" } } -> Option A
Quick Check:
HAL link = object with href [OK]

Quick Trick: HAL links always use an object with href property [OK]

Common Mistakes:

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Which of the following is the correct JSON syntax for a HAL link to a 'self' resource?