[Solved] You have a GraphQL schema with types Product and Category. A product can belong to multiple categories, and... How do you design this relationship and avoid duplicate category entries when querying? | GraphQL

GraphQL - Type Relationships

You have a GraphQL schema with types Product and Category. A product can belong to multiple categories, and categories can have multiple products. How do you design this relationship and avoid duplicate category entries when querying?

AUse many-to-many with lists and ensure unique IDs in resolver to prevent duplicates

BUse one-to-many with a single category per product

CUse one-to-one with a single category and product

DUse scalar fields for category names instead of relationships

Step-by-Step Solution

Solution:

Step 1: Identify relationship type
Multiple categories per product and vice versa is many-to-many.
Step 2: Prevent duplicates
Resolvers should return unique category IDs to avoid duplicate entries in queries.
Final Answer:
Use many-to-many with lists and ensure unique IDs in resolver to prevent duplicates -> Option A
Quick Check:
Many-to-many with unique IDs avoids duplicates [OK]

Quick Trick: Ensure unique IDs in many-to-many resolvers [OK]

Common Mistakes:

Using one-to-many incorrectly
Ignoring duplicates in resolver
Using scalar fields instead of relationships

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More GraphQL Quizzes

How do you design this relationship and avoid duplicate category entries when querying?

Step 1: Identify relationship type

Step 2: Prevent duplicates

Final Answer:

Quick Check:

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