Description: Data validation in GraphQL refers to the process of ensuring that the data sent and received through GraphQL operations meets certain expected criteria and formats. This process is crucial for maintaining the integrity and quality of data in applications that use GraphQL as their query language. Validation can include checking data types, verifying the mandatory nature of certain fields, and validating specific values, such as numeric ranges or text formats. GraphQL allows developers to define schemas that specify data types and relationships between them, facilitating the implementation of validation. By defining a schema, a solid foundation for validation is established, as any query or mutation that does not conform to this schema will be rejected. This not only helps prevent errors in data manipulation but also enhances the developer experience by providing clear and specific error messages. In summary, data validation in GraphQL is an essential component that contributes to the robustness and reliability of applications, ensuring that data is consistent and in the correct format before being processed or stored.
