Basics
GraphQL Variables
Using Query Variables
GraphQL variables use $ for dynamic query inputs.
Introduction to GraphQL Variables
GraphQL variables are a powerful feature that allow developers to make queries more dynamic and flexible. By using variables, you can avoid hardcoding values in your queries, making them reusable and easier to manage. Variables in GraphQL are prefixed with a $ symbol.
Defining Variables in GraphQL Queries
To use variables in a GraphQL query, you need to define them in two places: the query declaration and the query execution. In the query declaration, you specify the variables with their types. In the query execution, you provide the actual variable values.
Executing a GraphQL Query with Variables
When executing a GraphQL query with variables, you pass a JSON object containing the variable values to the GraphQL server. This approach enhances flexibility and allows for dynamic query input during runtime.
Benefits of Using GraphQL Variables
Using variables in your GraphQL queries offers several advantages:
- Reusability: Write queries once and use them with different variable values.
- Readability: Cleaner query syntax by removing hardcoded values.
- Security: Helps prevent injection attacks by separating query structure from input values.
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