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Identify the error in this mutation definition:

medium📝 Debug Q14 of 15
GraphQL - Mutations
Identify the error in this mutation definition:

mutation deleteUser(id: ID!) { removeUser(id: id) { success } }
AremoveUser field cannot have arguments
BVariable type ID! is incorrect
CMutation name deleteUser is invalid
DMissing $ before variable name in mutation definition
Step-by-Step Solution
Solution:
  1. Step 1: Check variable declaration syntax

    Variables in mutation definitions must start with $, e.g., $id: ID!.
  2. Step 2: Verify usage inside mutation

    Inside the mutation body, use the variable with $id, not just id.
  3. Final Answer:

    Missing $ before variable name in mutation definition -> Option D
  4. Quick Check:

    Variables require $ prefix in definition and usage [OK]
Quick Trick: Always prefix variables with $ in mutation definitions [OK]
Common Mistakes:
  • Omitting $ in variable declaration
  • Using variable name without $ inside mutation
  • Assuming mutation name must match field

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