GraphQL - Resolvers
You want to fetch a user's full profile by combining data from two sources: a database and an external API. How should you design the resolver for the
userProfile field?You want to fetch a user's full profile by combining data from two sources: a database and an external API. How should you design the resolver for the userProfile field?
hard📝 Application Q15 of 15
Step-by-Step Solution
Solution:
Step 1: Understand resolver role in combining data
Resolvers can run code to fetch and combine data from multiple sources before returning.Step 2: Evaluate options for fetching and merging data
Write a resolver that calls the database and API, then merges results before returning correctly describes writing a resolver that calls both sources and merges results. Other options either ignore data sources or misuse resolvers.Final Answer:
Write a resolver that calls the database and API, then merges results before returning -> Option DQuick Check:
Resolvers combine data sources = A [OK]
Quick Trick: Combine data in one resolver function for the field [OK]
Common Mistakes:
- Expecting schema alone to fetch data
- Trying multiple resolvers for one field
- Ignoring one data source
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