Context setup in GraphQL - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is the purpose of context in GraphQL?

Context in GraphQL is used to share data, like authentication info or database connections, across all resolvers during a query execution.

beginner

How do you typically provide context in a GraphQL server?

You provide context by defining a function or object when setting up the GraphQL server that runs for each request, passing shared data to resolvers.

intermediate

Why is context important for authentication in GraphQL?

Context allows you to pass user authentication details to resolvers so they can check permissions before returning data.

intermediate

Can context be different for each GraphQL request? Why?

Yes, context is created fresh for each request to keep data isolated and secure between users.

beginner

Give an example of what might be included in GraphQL context.

Examples include the current user info, database connection, caching tools, or API keys needed by resolvers.

What is the main role of context in a GraphQL server?

A To define the GraphQL schema

B To format the GraphQL query

C To store query results permanently

D To share data between resolvers during a request

Context shares data like authentication or database connections between resolvers during a single request.

When is the context object created in a GraphQL server?

A For each incoming request

B When the schema is built

C Only when a mutation is called

D Once when the server starts

Context is created fresh for each request to keep data isolated and secure.

Which of these is NOT typically included in GraphQL context?

A User authentication info

B Database connection

C GraphQL query text

D API keys

The query text is handled separately; context holds shared data like user info or connections.

Why should context be different for each request?

A To improve query speed

B To isolate user data and maintain security

C To reduce server memory usage

D To cache query results

Different context per request keeps user data isolated and secure.

How do resolvers access the context in GraphQL?

A Through the third argument

B Through the second argument

C Through the first argument

D Through a global variable

Resolvers receive context as the third argument in their function signature.

Explain what GraphQL context is and why it is useful.

Think about what data resolvers need to share during a query.

Describe how you would set up context in a GraphQL server and what you might include in it.

Consider what information resolvers need to access for each request.