Action links for state transitions in Rest API - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to add an action link for the 'approve' transition.

Rest API

{
  "state": "pending",
  "actions": [
    {"name": "approve", "href": "/orders/[1]/approve"}
  ]
}

Drag options to blanks, or click blank then click option'

Aorder_id

Bid

C123

DorderId

Attempts:

3 left

💡 Hint

Common Mistakes

Using a literal number instead of a placeholder.

Using an underscore style that is inconsistent with the rest of the API.

The 'id' placeholder is commonly used to represent the resource identifier in REST API URLs.

2fill in blank

medium

Complete the code to add an action link for the 'cancel' transition with HTTP method DELETE.

Rest API

{
  "state": "approved",
  "actions": [
    {"name": "cancel", "href": "/orders/[1]/cancel", "method": "[2]"}
  ]
}

Drag options to blanks, or click blank then click option'

Aid

BorderId

CDELETE

DPOST

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'POST' instead of 'DELETE' for cancel action.

Using a wrong placeholder for the resource id.

The 'id' is the resource identifier and 'DELETE' is the HTTP method used to cancel or remove a resource.

3fill in blank

hard

Fix the error in the action link for the 'ship' transition by completing the HTTP method.

Rest API

{
  "state": "paid",
  "actions": [
    {"name": "ship", "href": "/orders/[1]/ship", "method": "[2]"}
  ]
}

Drag options to blanks, or click blank then click option'

Aid

BPUT

CGET

DPATCH

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'GET' which is for retrieving data, not updating.

Using 'PATCH' which is for partial updates but 'ship' implies a full state change.

The 'ship' action updates the order state, so 'PUT' is the appropriate HTTP method to update the resource.

4fill in blank

hard

Fill both blanks to add action links for 'approve' and 'reject' transitions with correct HTTP methods.

Rest API

{
  "state": "pending",
  "actions": [
    {"name": "approve", "href": "/orders/[1]/approve", "method": "[2]"},
    {"name": "reject", "href": "/orders/[1]/reject", "method": "[2]"}
  ]
}

Drag options to blanks, or click blank then click option'

Aid

BPOST

CPUT

DDELETE

Attempts:

3 left

💡 Hint

Common Mistakes

Using different identifiers for the two actions.

Using 'PUT' or 'DELETE' instead of 'POST' for these transitions.

Both 'approve' and 'reject' are state transitions that create a new state, so 'POST' is the correct HTTP method and 'id' is the resource identifier.

5fill in blank

hard

Fill all three blanks to create an action link for 'refund' with resource id, HTTP method, and content type.

Rest API

{
  "state": "shipped",
  "actions": [
    {
      "name": "refund",
      "href": "/orders/[1]/refund",
      "method": "[2]",
      "headers": {"Content-Type": "[3]"}
    }
  ]
}

Drag options to blanks, or click blank then click option'

Aid

BPOST

Capplication/json

DPUT

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'PUT' instead of 'POST' for refund.

Omitting the content type or using an incorrect one.

The 'refund' action uses the resource 'id', the 'POST' method to submit the refund request, and the content type 'application/json' for the request body.