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Why is it important to define the 'many' side as a list type in GraphQL schemas for one-to-many relationships?

hard📝 Conceptual Q10 of 15
GraphQL - Type Relationships
Why is it important to define the 'many' side as a list type in GraphQL schemas for one-to-many relationships?
ABecause single types cannot have relationships
BBecause GraphQL requires all fields to be lists
CBecause it improves query performance automatically
DBecause it allows returning multiple related items and supports nested queries
Step-by-Step Solution
Solution:

  1. Step 1: Understand purpose of list types in relationships

    List types allow returning multiple related items, which matches one-to-many semantics.

  2. Step 2: Recognize benefits for nested queries

    Defining many side as list enables nested queries to fetch all related items properly.

  3. Final Answer:

    Because it allows returning multiple related items and supports nested queries -> Option D

  4. Quick Check:

    List type enables multiple related items [OK]
Quick Trick: List types enable multiple related items in queries [OK]
Common Mistakes:
  • Thinking all fields must be lists
  • Believing single types can't have relationships
  • Assuming list types improve performance automatically

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