Practical GraphQL - Become a GraphQL Ninja - Type Relationships in GraphQL

The video tutorial explains how to establish relationships between types using GraphQL, focusing on linking cars to users. It covers adding an owner field to the car type, testing the setup, handling errors, and creating a custom resolver to fetch user data. The tutorial concludes with final tests and results, demonstrating how to access user information linked to cars.

What is the purpose of adding an 'owner' field to the car type in GraphQL?

• To link each car to a user

• To track the car's mileage

• To store the car's color

• To record the car's manufacturing date

How is the relationship between cars and users represented in the data?

• By linking cars to users through a 'model' field

• By adding a 'color' property to cars

• By adding an 'owned by' property to cars

• By creating a separate table for relationships

What error is encountered during testing in the GraphQL playground?

• An incorrect data type for the 'owner' field

• A null value for a non-nullable field

• A missing field in the user type

• A syntax error in the query

Why is a custom resolver needed for the 'owner' field?

• To handle complex queries

• To simplify the schema

• To fetch user information based on the 'owned by' property

• To improve performance

What does the custom resolver return for the 'owner' field?

• The car's manufacturing date

• The user's name

• The car's color

• The user's ID

How is the correct user fetched in the custom resolver?

• By using the car's model

• By subtracting one from the 'owned by' ID

• By adding one to the 'owned by' ID

• By using the car's color

What is the result of successfully resolving the 'owner' field?

• The car's color

• The car's manufacturing date

• A list of all car models

• The name of the car's owner