@mikro-orm/core
Version:
TypeScript ORM for Node.js based on Data Mapper, Unit of Work and Identity Map patterns. Supports MongoDB, MySQL, PostgreSQL and SQLite databases as well as usage with vanilla JavaScript.
49 lines (48 loc) • 2.46 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.ReflectMetadataProvider = void 0;
require("reflect-metadata");
const MetadataProvider_1 = require("./MetadataProvider");
const enums_1 = require("../enums");
const Utils_1 = require("../utils/Utils");
class ReflectMetadataProvider extends MetadataProvider_1.MetadataProvider {
loadEntityMetadata(meta, name) {
this.initProperties(meta);
}
initProperties(meta) {
// load types and column names
for (const prop of meta.props) {
if (typeof prop.entity === 'string') {
prop.type = prop.entity;
}
else if (prop.entity) {
const tmp = prop.entity();
prop.type = Array.isArray(tmp) ? tmp.map(t => Utils_1.Utils.className(t)).sort().join(' | ') : Utils_1.Utils.className(tmp);
}
else {
this.initPropertyType(meta, prop);
}
}
}
initPropertyType(meta, prop) {
const type = Reflect.getMetadata('design:type', meta.prototype, prop.name);
if (!prop.type && (!type || (type === Object && prop.kind !== enums_1.ReferenceKind.SCALAR)) && !(prop.enum && (prop.items?.length ?? 0) > 0)) {
throw new Error(`Please provide either 'type' or 'entity' attribute in ${meta.className}.${prop.name}. If you are using decorators, ensure you have 'emitDecoratorMetadata' enabled in your tsconfig.json.`);
}
// Force mapping to UnknownType which is a string when we see just `Object`, as that often means failed inference.
// This is to prevent defaulting to JSON column type, which can often be hard to revert and cause hard to understand issues with PKs.
// If there are explicitly provided `columnTypes`, we use those instead for the inference, this way
// we can have things like `columnType: 'timestamp'` be respected as `type: 'Date'`.
if (prop.kind === enums_1.ReferenceKind.SCALAR && type === Object && !prop.columnTypes) {
prop.type ??= 'any';
return;
}
let typeName = type?.name;
if (typeName && ['string', 'number', 'boolean', 'array', 'object'].includes(typeName.toLowerCase())) {
typeName = typeName.toLowerCase();
}
prop.type ??= typeName;
prop.runtimeType ??= typeName;
}
}
exports.ReflectMetadataProvider = ReflectMetadataProvider;