If a User has no Profile linked, what will this query return?

medium📝 query result Q5 of 15

GraphQL - Type Relationships

{ user(id: "2") { name profile { bio } } }

AError: Cannot query profile of null

B{ "data": { "user": { "name": "Bob", "profile": { "bio": "" } } } }

C{ "data": { "user": { "name": "Bob", "profile": null } } }

D{ "data": { "user": null } }

Step-by-Step Solution

Solution:

Step 1: Understand nullable fields in schema
Profile field can be null if no linked profile exists.
Step 2: Predict query output when profile missing
Query returns user data with profile as null, no error.
Final Answer:
{ "data": { "user": { "name": "Bob", "profile": null } } } -> Option C
Quick Check:
Missing one-to-one linked data returns null field [OK]

Quick Trick: Missing linked object returns null, not error [OK]

Common Mistakes:

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