@loopback/repository
Version:
Define and implement a common set of interfaces for interacting with databases
53 lines • 2.93 kB
JavaScript
;
// Copyright IBM Corp. and LoopBack contributors 2018,2019. All Rights Reserved.
// Node module: @loopback/repository
// This file is licensed under the MIT License.
// License text available at https://opensource.org/licenses/MIT
Object.defineProperty(exports, "__esModule", { value: true });
exports.createBelongsToAccessor = void 0;
const tslib_1 = require("tslib");
const debug_1 = tslib_1.__importDefault(require("debug"));
const belongs_to_helpers_1 = require("./belongs-to.helpers");
const belongs_to_inclusion_resolver_1 = require("./belongs-to.inclusion-resolver");
const belongs_to_repository_1 = require("./belongs-to.repository");
const debug = (0, debug_1.default)('loopback:repository:relations:belongs-to:accessor');
/**
* Enforces a BelongsTo constraint on a repository
* If the target model is polymorphic, i.e. stored within different repositories,
* supply the targetRepositoryGetter with a dictionary in the form of {[typeName: string]: repositoryGetter}
*/
function createBelongsToAccessor(belongsToMetadata, targetRepositoryGetter, sourceRepository) {
const meta = (0, belongs_to_helpers_1.resolveBelongsToMetadata)(belongsToMetadata);
// resolve the repositoryGetter into a dictionary
if (typeof targetRepositoryGetter === 'function') {
targetRepositoryGetter = {
[meta.target().name]: targetRepositoryGetter,
};
}
debug('Resolved BelongsTo relation metadata: %o', meta);
const result = async function getTargetInstanceOfBelongsTo(sourceId, polymorphicTypes) {
if (meta.polymorphic !== false) {
if (!polymorphicTypes || polymorphicTypes.length === 0) {
console.warn('It is highly recommended to specify the polymorphicTypes param when using polymorphic types.');
}
}
const foreignKey = meta.keyFrom;
const primaryKey = meta.keyTo;
const sourceModel = await sourceRepository.findById(sourceId);
const foreignKeyValue = sourceModel[foreignKey];
// workaround to check referential integrity.
// should be removed once the memory connector ref integrity is done
// GH issue: https://github.com/loopbackio/loopback-next/issues/2333
if (!foreignKeyValue) {
return undefined;
}
// eslint-disable-next-line @typescript-eslint/no-explicit-any
const constraint = { [primaryKey]: foreignKeyValue };
const constrainedRepo = new belongs_to_repository_1.DefaultBelongsToRepository(targetRepositoryGetter, constraint, belongsToMetadata.target);
return constrainedRepo.get({ polymorphicType: polymorphicTypes });
};
result.inclusionResolver = (0, belongs_to_inclusion_resolver_1.createBelongsToInclusionResolver)(meta, targetRepositoryGetter);
return result;
}
exports.createBelongsToAccessor = createBelongsToAccessor;
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