| import { GraphQLError } from "../../error/GraphQLError.mjs"; |
| |
| /** |
| * Unique fragment names |
| * |
| * A GraphQL document is only valid if all defined fragments have unique names. |
| */ |
| export function UniqueFragmentNamesRule(context) { |
| var knownFragmentNames = Object.create(null); |
| return { |
| OperationDefinition: function OperationDefinition() { |
| return false; |
| }, |
| FragmentDefinition: function FragmentDefinition(node) { |
| var fragmentName = node.name.value; |
| |
| if (knownFragmentNames[fragmentName]) { |
| context.reportError(new GraphQLError("There can be only one fragment named \"".concat(fragmentName, "\"."), [knownFragmentNames[fragmentName], node.name])); |
| } else { |
| knownFragmentNames[fragmentName] = node.name; |
| } |
| |
| return false; |
| } |
| }; |
| } |