@neo4j/graphql
Version:
A GraphQL to Cypher query execution layer for Neo4j and JavaScript GraphQL implementations
67 lines • 3 kB
JavaScript
;
/*
* 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.
*/
var __importDefault = (this && this.__importDefault) || function (mod) {
return (mod && mod.__esModule) ? mod : { "default": mod };
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.TopLevelUpdateMutationOperation = void 0;
const cypher_builder_1 = __importDefault(require("@neo4j/cypher-builder"));
const utils_1 = require("../../../../utils/utils");
const operations_1 = require("./operations");
/** Wrapper over TopLevelUpdateMutationOperation for top level update, that support multiple update operations
* This extends Operation because we don't need the mutationOperation API for top level
*/
class TopLevelUpdateMutationOperation extends operations_1.Operation {
constructor({ updateOperations, projectionOperations, }) {
super();
this.updateOperations = [];
this.updateOperations = updateOperations;
this.projectionOperations = projectionOperations;
}
getChildren() {
return (0, utils_1.filterTruthy)([...this.updateOperations, ...this.projectionOperations]);
}
transpile(context) {
context.env.topLevelOperationName = "UPDATE";
if (!context.hasTarget()) {
throw new Error("No parent node found!");
}
const subqueries = this.updateOperations.map((field) => {
const { clauses } = field.transpile(context);
return cypher_builder_1.default.utils.concat(...clauses, ...field.getAuthorizationSubqueries(context));
});
const projection = this.getProjectionClause(context);
return {
projectionExpr: context.returnVariable,
clauses: [...subqueries, projection],
};
}
getProjectionClause(context) {
const projectionOperation = this.projectionOperations[0]; // TODO: multiple projection operations not supported
if (!projectionOperation) {
return new cypher_builder_1.default.Finish();
}
const result = projectionOperation.operation.transpile(context);
const extraWith = new cypher_builder_1.default.With(context.target);
return cypher_builder_1.default.utils.concat(extraWith, ...result.clauses);
}
}
exports.TopLevelUpdateMutationOperation = TopLevelUpdateMutationOperation;
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