| import { GraphQLError } from '../../error/GraphQLError.mjs'; |
| |
| /** |
| * No undefined variables |
| * |
| * A GraphQL operation is only valid if all variables encountered, both directly |
| * and via fragment spreads, are defined by that operation. |
| * |
| * See https://spec.graphql.org/draft/#sec-All-Variable-Uses-Defined |
| */ |
| export function NoUndefinedVariablesRule(context) { |
| let variableNameDefined = Object.create(null); |
| return { |
| OperationDefinition: { |
| enter() { |
| variableNameDefined = Object.create(null); |
| }, |
| |
| leave(operation) { |
| const usages = context.getRecursiveVariableUsages(operation); |
| |
| for (const { node } of usages) { |
| const varName = node.name.value; |
| |
| if (variableNameDefined[varName] !== true) { |
| context.reportError( |
| new GraphQLError( |
| operation.name |
| ? `Variable "$${varName}" is not defined by operation "${operation.name.value}".` |
| : `Variable "$${varName}" is not defined.`, |
| { |
| nodes: [node, operation], |
| }, |
| ), |
| ); |
| } |
| } |
| }, |
| }, |
| |
| VariableDefinition(node) { |
| variableNameDefined[node.variable.name.value] = true; |
| }, |
| }; |
| } |