Rest API - HATEOAS and Linking
You want to design a HAL response for a blog post that includes links to the author and comments. Which JSON structure correctly follows HAL format?
You want to design a HAL response for a blog post that includes links to the author and comments. Which JSON structure correctly follows HAL format?
hard📝 Application Q15 of 15
Step-by-Step Solution
Solution:
Step 1: Verify the
{ "title": "My Post", "_links": { "self": { "href": "/posts/1" }, "author": { "href": "/users/42" }, "comments": [ { "href": "/comments/100" }, { "href": "/comments/101" } ] } } correctly uses_linkskey and link objects_linkswith each link as an object containinghref. Multiple comments are an array of link objects.Step 2: Check other options for errors
{ "title": "My Post", "links": { "self": "/posts/1", "author": "/users/42", "comments": ["/comments/100", "/comments/101"] } } uses "links" without underscore and strings instead of objects. { "title": "My Post", "_links": { "self": "/posts/1", "author": "/users/42", "comments": "/comments/100,/comments/101" } } uses strings instead of objects for links. { "title": "My Post", "_link": { "self": { "href": "/posts/1" }, "author": { "href": "/users/42" }, "comments": [ { "href": "/comments/100" }, { "href": "/comments/101" } ] } } uses incorrect key "_link" instead of "_links".Final Answer:
Option A JSON structure correctly follows HAL format -> Option AQuick Check:
HAL requires_linkswith objects havinghref[OK]
Quick Trick: Use
_links with objects and href for all links [OK]Common Mistakes:
- Missing underscore in
_links - Using strings instead of objects for links
- Wrong key name like
_link
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