[Solved] You wrote this GraphQL schema snippet:type User { groups: Group } type Group { users: User }Why does this cause problems in representing many-to-many relationships? | GraphQL

GraphQL - Type Relationships

You wrote this GraphQL schema snippet:

type User { groups: Group } type Group { users: User }

Why does this cause problems in representing many-to-many relationships?

ABecause the field names are incorrect

BBecause <code>groups</code> and <code>users</code> are not lists, so only one group or user can be linked

CBecause GraphQL does not allow circular references

DBecause the types are missing scalar fields

Step-by-Step Solution

Solution:

Step 1: Check field types for many-to-many
Many-to-many requires lists on both sides, but here groups and users are single objects, not lists.
Step 2: Understand impact on data modeling
This means each User can link to only one Group and vice versa, not many, so it breaks many-to-many.
Final Answer:
Because groups and users are not lists, so only one group or user can be linked -> Option B
Quick Check:
Lists needed for many-to-many [OK]

Quick Trick: Use lists, not single objects, for many-to-many fields [OK]

Common Mistakes:

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