52 lines
1.5 KiB
Plaintext
52 lines
1.5 KiB
Plaintext
// @flow strict
|
|
|
|
import { GraphQLError } from '../../error/GraphQLError';
|
|
import { type ASTVisitor } from '../../language/visitor';
|
|
|
|
import { type ValidationContext } from '../ValidationContext';
|
|
|
|
export function undefinedVarMessage(varName: string, opName: ?string): string {
|
|
return opName
|
|
? `Variable "$${varName}" is not defined by operation "${opName}".`
|
|
: `Variable "$${varName}" is not defined.`;
|
|
}
|
|
|
|
/**
|
|
* No undefined variables
|
|
*
|
|
* A GraphQL operation is only valid if all variables encountered, both directly
|
|
* and via fragment spreads, are defined by that operation.
|
|
*/
|
|
export function NoUndefinedVariables(context: ValidationContext): ASTVisitor {
|
|
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(
|
|
undefinedVarMessage(
|
|
varName,
|
|
operation.name && operation.name.value,
|
|
),
|
|
[node, operation],
|
|
),
|
|
);
|
|
}
|
|
}
|
|
},
|
|
},
|
|
VariableDefinition(node) {
|
|
variableNameDefined[node.variable.name.value] = true;
|
|
},
|
|
};
|
|
}
|