@neo4j/graphql
Version:
A GraphQL to Cypher query execution layer for Neo4j and JavaScript GraphQL implementations
58 lines • 2.51 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.OperationField = void 0;
const cypher_builder_1 = __importDefault(require("@neo4j/cypher-builder"));
const QueryASTContext_1 = require("../QueryASTContext");
const CypherAttributeOperation_1 = require("../operations/CypherAttributeOperation");
const CypherEntityOperation_1 = require("../operations/CypherEntityOperation");
const CompositeCypherOperation_1 = require("../operations/composite/CompositeCypherOperation");
const Field_1 = require("./Field");
class OperationField extends Field_1.Field {
constructor({ operation, alias }) {
super(alias);
this.operation = operation;
}
getChildren() {
return [this.operation];
}
getProjectionField() {
if (!this.projectionExpr) {
throw new Error("Projection expression of operation not available (has transpile been called)?");
}
return { [this.alias]: this.projectionExpr };
}
getSubqueries(context) {
const subqueryContext = new QueryASTContext_1.QueryASTContext({ ...context, returnVariable: new cypher_builder_1.default.Variable() });
const result = this.operation.transpile(subqueryContext);
this.projectionExpr = result.projectionExpr;
return result.clauses;
}
isCypherField() {
return (this.operation instanceof CypherEntityOperation_1.CypherEntityOperation ||
this.operation instanceof CypherAttributeOperation_1.CypherAttributeOperation ||
this.operation instanceof CompositeCypherOperation_1.CompositeCypherOperation);
}
}
exports.OperationField = OperationField;
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