GraphQL - Mutations
You need to delete several posts by their IDs in a single GraphQL mutation. Which mutation design is most appropriate?
You need to delete several posts by their IDs in a single GraphQL mutation. Which mutation design is most appropriate?
hard📝 Application Q8 of 15
Step-by-Step Solution
Solution:
Step 1: Understand batch deletion
Deleting multiple items in one mutation typically requires passing a list of IDs.Step 2: Analyze options
mutation { deletePosts(postIds: ["101", "102", "103"]) { success count } } correctly passes an array of strings aspostIds. mutation { deletePost(postId: "101") { success } deletePost(postId: "102") { success } } calls multiple mutations separately, which is inefficient. mutation { deletePosts(ids: "101,102,103") { success } } passes a single string instead of a list. mutation { deletePosts(postId: "101") { success } } passes only one ID.Final Answer:
mutation { deletePosts(postIds: ["101", "102", "103"]) { success count } } -> Option DQuick Check:
Batch deletes use list arguments, not multiple calls [OK]
Quick Trick: Use list arguments for batch delete mutations [OK]
Common Mistakes:
- Calling multiple single-item delete mutations instead of batch
- Passing comma-separated string instead of list
- Using singular argument names for multiple IDs
Master "Mutations" in GraphQL
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