GraphQL - Schema Definition Language (SDL)
You want to create a mutation that accepts a list of input objects to add multiple users at once. Which input type definition and mutation argument are correct?
You want to create a mutation that accepts a list of input objects to add multiple users at once. Which input type definition and mutation argument are correct?
hard📝 Application Q8 of 15
Step-by-Step Solution
Solution:
Step 1: Understand list input type syntax
To accept a list of non-null UserInput objects, use[UserInput!]!meaning list is non-null and items are non-null.Step 2: Check mutation argument matches input type
input UserInput { name: String!, age: Int } mutation addUsers($users: [UserInput!]!) { addUsers(users: $users) { id name } } correctly declares variable as$users: [UserInput!]!and passes it as argument.Final Answer:
input UserInput { name: String!, age: Int } mutation addUsers($users: [UserInput!]!) { addUsers(users: $users) { id name } } -> Option AQuick Check:
Use [Type!]! for non-null list of non-null items [OK]
Quick Trick: Use [Type!]! for required list of required items [OK]
Common Mistakes:
- Omitting exclamation marks causing nullable lists or items
- Passing single object instead of list
- Using [Type] without non-null modifiers
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