[Solved] You want to create a mutation that accepts a complex input object with fields title (String), content (String),... Which is the correct way to define the input argument and use it in the mutation? | GraphQL

GraphQL - Mutations

You want to create a mutation that accepts a complex input object with fields title (String), content (String), and tags (list of Strings). Which is the correct way to define the input argument and use it in the mutation?

A

type PostInput { title: String!, content: String!, tags: [String!]! }<br>mutation createPost(post: PostInput!) { addPost(post: post) { id } }

B

input PostInput { title: String, content: String, tags: String }<br>mutation createPost($post: PostInput) { addPost(post: $post) { id } }

C

input PostInput { title: String!, content: String!, tags: [String!]! }<br>mutation createPost($post: PostInput!) { addPost(input: $post) { id } }

D

input PostInput { title: String!, content: String!, tags: [String] }<br>mutation createPost($post: PostInput!) { addPost(input: post) { id } }

Step-by-Step Solution

Solution:

Step 1: Define input type correctly
Use input keyword with required fields and list type: tags: [String!]! means list of non-null strings, list itself required.
Step 2: Declare variable and use it properly
Declare variable with $post: PostInput! and use it as input: $post inside mutation.
Final Answer:
input PostInput { title: String!, content: String!, tags: [String!]! }
mutation createPost($post: PostInput!) { addPost(input: $post) { id } } -> Option C
Quick Check:
Use input type and $variable with correct usage [OK]

Quick Trick: Use input type and $variable with correct usage inside mutation [OK]

Common Mistakes:

Using type instead of input for input objects
Omitting $ in variable declaration or usage
Incorrect list type syntax or missing non-null markers
Passing variable without $ inside mutation

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Which is the correct way to define the input argument and use it in the mutation?

Step 1: Define input type correctly

Step 2: Declare variable and use it properly

Final Answer:

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