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You wrote a GraphQL schema but get an error that a field resolver is missing. What is a likely cause if you expect the default resolver to work?

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GraphQL - Resolvers
You wrote a GraphQL schema but get an error that a field resolver is missing. What is a likely cause if you expect the default resolver to work?
AYou forgot to define the field in the schema
BThe parent object does not have a matching field name
CDefault resolvers only work with scalar types
DYou must always write custom resolvers
Step-by-Step Solution
Solution:
  1. Step 1: Understand default resolver requirements

    Default resolvers look up the field name in the parent object. If the field is missing, resolution fails.
  2. Step 2: Analyze error cause

    If the parent object lacks the field, the default resolver cannot find a value, causing an error.
  3. Final Answer:

    The parent object does not have a matching field name -> Option B
  4. Quick Check:

    Missing parent field = missing default resolver value [OK]
Quick Trick: Default resolver needs matching parent field name to work [OK]
Common Mistakes:
  • Assuming default resolvers require custom code always
  • Believing default resolvers only work with scalars
  • Ignoring schema field definitions

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