eslint-plugin-type-graphql/dist/rules/prefer-null-over-undefined.js

Linter for TypeGraphQL decorators

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
const createRule_1 = require("../util/createRule");
const experimental_utils_1 = require("@typescript-eslint/experimental-utils");
const typeGraphQLUtil_1 = require("../util/typeGraphQLUtil");
exports.default = createRule_1.createRule({
    name: 'prefer-null-over-undefined',
    meta: {
        docs: {
            description: 'Warns when undefined is used in a type that is decorated with a TypeGraphQL decorator',
            category: 'Best Practices',
            recommended: 'warn',
            requiresTypeChecking: true,
        },
        messages: {
            preferNullOverUndefined: 'Prefer null over undefined in types that are exposed in the GraphQL schema',
        },
        schema: [],
        type: 'problem',
    },
    defaultOptions: [],
    create(context) {
        const parserServices = experimental_utils_1.ESLintUtils.getParserServices(context);
        const checker = parserServices.program.getTypeChecker();
        return typeGraphQLUtil_1.getTypeGraphQLVisitors(checker, parserServices, ({ decoratorProps, decoratedProps }) => {
            var _a;
            // Check whether the decorated type is known and valid
            if (!((_a = decoratedProps.type) === null || _a === void 0 ? void 0 : _a.isValid)) {
                return;
            }
            if (decoratedProps.type.isUndefinable || decoratedProps.type.isArrayUndefinable) {
                // This type uses undefined
                context.report({
                    node: decoratorProps.node,
                    messageId: 'preferNullOverUndefined',
                });
            }
        });
    },
});
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