[Solved] Given this composite operation request: { "operations": [ {"method": "POST", "path": "/users", "body": {"name": "Alice"}}, {"method": "POST", "path": "/orders", "body": {"userId": "${1.id}", "item":... | Rest API

Rest API - Advanced Patterns

Given this composite operation request:

{
  "operations": [
    {"method": "POST", "path": "/users", "body": {"name": "Alice"}},
    {"method": "POST", "path": "/orders", "body": {"userId": "${1.id}", "item": "Book"}}
  ]
}

What is the expected behavior?

ACreate a user named Alice, then create an order linked to that user using the new user ID.

BCreate an order first, then create a user named Alice.

CCreate a user named Alice only; the order creation will fail due to syntax error.

DThe request will fail because referencing previous operation results is not allowed.

Step-by-Step Solution

Solution:

Step 1: Understand operation order and referencing
The first operation creates a user named Alice. The second operation uses "${1.id}" to reference the ID from the first operation's result.
Step 2: Determine expected behavior
This means the order is created linked to the new user. This chaining is a key feature of composite operations.
Final Answer:
Create a user named Alice, then create an order linked to that user using the new user ID. -> Option A
Quick Check:
Reference previous result with ${1.id} = chained operations [OK]

Quick Trick: Look for ${1.id} to see chaining between operations [OK]

Common Mistakes:

MISTAKES

Assuming operations run in parallel without order
Thinking referencing previous results is invalid
Confusing operation indexes starting at 0 instead of 1

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Given this composite operation request:

Step 1: Understand operation order and referencing

Step 2: Determine expected behavior

Final Answer:

Quick Check:

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