@neo4j/graphql
Version:
A GraphQL to Cypher query execution layer for Neo4j and JavaScript GraphQL implementations
159 lines • 6.62 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.getMutationFieldStatements = getMutationFieldStatements;
const classes_1 = require("../../classes");
const constants_1 = require("../../constants");
const map_to_db_property_1 = __importDefault(require("../../utils/map-to-db-property"));
const math_1 = require("./math");
const parse_mutable_field_1 = require("./parse-mutable-field");
/**
* Transforms a key-value pair such as:
* { name_SET: "John" }
* Into statements such as:
* SET node.name = $param
**/
function getMutationFieldStatements({ nodeOrRel, param, key, varName, value, withVars, isUpdateOperation = false, }) {
const strs = [];
const { settableField, operator } = (0, parse_mutable_field_1.parseMutableField)(nodeOrRel, key);
if (!operator && isUpdateOperation) {
const result = getMutationFieldStatementsForGenericOperator({
nodeOrRel,
param,
key,
varName,
operations: value,
withVars,
});
return result;
}
if (settableField) {
const dbFieldName = (0, map_to_db_property_1.default)(nodeOrRel, settableField.fieldName);
if (settableField.typeMeta.required && value === null) {
throw new Error(`Cannot set non-nullable field ${nodeOrRel.name}.${settableField.fieldName} to null`);
}
switch (operator ?? "SET") {
case "SET": {
const isSpatial = constants_1.SPATIAL_TYPES.includes(settableField.typeMeta.name);
const isZonedTemporal = ["DateTime", "Time"].includes(settableField.typeMeta.name);
if (isSpatial) {
if (settableField.typeMeta.array) {
strs.push(`SET ${varName}.${dbFieldName} = [p in $${param} | point(p)]`);
}
else {
strs.push(`SET ${varName}.${dbFieldName} = point($${param})`);
}
}
else if (isZonedTemporal) {
if (settableField.typeMeta.array) {
strs.push(`SET ${varName}.${dbFieldName} = [t in $${param} | ${settableField.typeMeta.name.toLowerCase()}(t)]`);
}
else {
strs.push(`SET ${varName}.${dbFieldName} = ${settableField.typeMeta.name.toLowerCase()}($${param})`);
}
}
else {
strs.push(`SET ${varName}.${dbFieldName} = $${param}`);
}
break;
}
case "INCREMENT":
case "DECREMENT":
case "ADD":
case "SUBTRACT":
case "DIVIDE":
case "MULTIPLY": {
const mathMatch = (0, math_1.matchMathField)(key);
const mathDescriptor = (0, math_1.mathDescriptorBuilder)(value, nodeOrRel, mathMatch);
const mathStatements = (0, math_1.buildMathStatements)(mathDescriptor, varName, withVars, param);
strs.push(...mathStatements);
break;
}
case "PUSH": {
const pointArrayField = nodeOrRel.pointFields.find((x) => x.fieldName === settableField.fieldName);
const zonedTemporalArrayField = nodeOrRel.temporalFields.find((x) => x.fieldName === settableField.fieldName &&
["DateTime", "Time"].includes(settableField.typeMeta.name));
if (pointArrayField) {
strs.push(`SET ${varName}.${dbFieldName} = ${varName}.${dbFieldName} + [p in $${param} | point(p)]`);
}
else if (zonedTemporalArrayField) {
strs.push(`SET ${varName}.${dbFieldName} = ${varName}.${dbFieldName} + [t in $${param} | ${settableField.typeMeta.name.toLowerCase()}(t)]`);
}
else {
strs.push(`SET ${varName}.${dbFieldName} = ${varName}.${dbFieldName} + $${param}`);
}
break;
}
case "POP": {
strs.push(`SET ${varName}.${dbFieldName} = ${varName}.${dbFieldName}[0..-$${param}]`);
break;
}
}
}
return strs.join("\n");
}
// Converts generic operator into cypher statements using the deprecated syntax as intermediate step
function getMutationFieldStatementsForGenericOperator({ nodeOrRel, param, key, varName, operations, withVars, }) {
if (Object.entries(operations).length > 1) {
throw new classes_1.Neo4jGraphQLError(`Conflicting modification of field ${key}: ${Object.keys(operations)
.map((n) => `[[${n}]]`)
.join(", ")} on type ${nodeOrRel.name}`);
}
return Object.entries(operations)
.map(([operator, value]) => {
return getMutationFieldStatements({
nodeOrRel,
param: `${param}.${operator}`,
key: `${key}_${newOperatorToDeprecated(operator)}`,
varName,
withVars,
value,
});
})
.join("\n");
}
function newOperatorToDeprecated(op) {
switch (op) {
case "set":
return "SET";
case "increment":
return "INCREMENT";
case "decrement":
return "DECREMENT";
case "add":
return "ADD";
case "subtract":
return "SUBTRACT";
case "divide":
return "DIVIDE";
case "multiply":
return "MULTIPLY";
case "push":
return "PUSH";
case "pop":
return "POP";
default:
throw new Error(`Unknown generic mutation operator ${op}`);
}
}
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