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Add validation on single relationship
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packages/graphql/src/schema/validation/custom-rules/error-single-relationships.ts
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|---|---|---|
| @@ -0,0 +1,58 @@ | ||
| /* | ||
| * Copyright (c) "Neo4j" | ||
| * Neo4j Sweden AB [http://neo4j.com] | ||
| * | ||
| * This file is part of Neo4j. | ||
| * | ||
| * Licensed under the Apache License, Version 2.0 (the "License"); | ||
| * you may not use this file except in compliance with the License. | ||
| * You may obtain a copy of the License at | ||
| * | ||
| * http://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software | ||
| * distributed under the License is distributed on an "AS IS" BASIS, | ||
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| * See the License for the specific language governing permissions and | ||
| * limitations under the License. | ||
| */ | ||
|
|
||
| import type { ASTVisitor, FieldDefinitionNode, ListTypeNode, NonNullTypeNode } from "graphql"; | ||
| import { Kind } from "graphql"; | ||
| import type { SDLValidationContext } from "graphql/validation/ValidationContext"; | ||
| import { relationshipDirective } from "../../../graphql/directives"; | ||
| import { createGraphQLError } from "./utils/document-validation-error"; | ||
|
|
||
| export function ErrorIfSingleRelationships(context: SDLValidationContext): ASTVisitor { | ||
| return { | ||
| FieldDefinition(field: FieldDefinitionNode) { | ||
| let isRelationship = false; | ||
| for (const directive of field.directives ?? []) { | ||
| if (directive.name.value === relationshipDirective.name) { | ||
| isRelationship = true; | ||
| } | ||
| } | ||
|
|
||
| const isList = Boolean(getListTypeNode(field)); | ||
| if (isRelationship && !isList) { | ||
| context.reportError( | ||
| createGraphQLError({ | ||
| errorMsg: `Using @relationship directive on a non-list property "${field.name.value}" is not supported.`, | ||
| }) | ||
| ); | ||
| } | ||
| }, | ||
| }; | ||
| } | ||
|
|
||
| function getListTypeNode(definition: FieldDefinitionNode | ListTypeNode | NonNullTypeNode): ListTypeNode | undefined { | ||
| if (definition.type.kind === Kind.NON_NULL_TYPE) { | ||
| return getListTypeNode(definition.type); | ||
| } | ||
|
|
||
| if (definition.type.kind === Kind.LIST_TYPE) { | ||
| return definition.type; | ||
| } | ||
|
|
||
| return; | ||
| } |
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