You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
42 lines
1.2 KiB
42 lines
1.2 KiB
4 months ago
|
import { groupBy } from '../../jsutils/groupBy.mjs';
|
||
|
import { GraphQLError } from '../../error/GraphQLError.mjs';
|
||
|
|
||
|
/**
|
||
|
* Unique variable names
|
||
|
*
|
||
|
* A GraphQL operation is only valid if all its variables are uniquely named.
|
||
|
*/
|
||
|
export function UniqueVariableNamesRule(context) {
|
||
|
return {
|
||
|
OperationDefinition(operationNode) {
|
||
|
var _operationNode$variab;
|
||
|
|
||
|
// See: https://github.com/graphql/graphql-js/issues/2203
|
||
|
|
||
|
/* c8 ignore next */
|
||
|
const variableDefinitions =
|
||
|
(_operationNode$variab = operationNode.variableDefinitions) !== null &&
|
||
|
_operationNode$variab !== void 0
|
||
|
? _operationNode$variab
|
||
|
: [];
|
||
|
const seenVariableDefinitions = groupBy(
|
||
|
variableDefinitions,
|
||
|
(node) => node.variable.name.value,
|
||
|
);
|
||
|
|
||
|
for (const [variableName, variableNodes] of seenVariableDefinitions) {
|
||
|
if (variableNodes.length > 1) {
|
||
|
context.reportError(
|
||
|
new GraphQLError(
|
||
|
`There can be only one variable named "$${variableName}".`,
|
||
|
{
|
||
|
nodes: variableNodes.map((node) => node.variable.name),
|
||
|
},
|
||
|
),
|
||
|
);
|
||
|
}
|
||
|
}
|
||
|
},
|
||
|
};
|
||
|
}
|