Method defineProperties

packages/core/src/entity/EntityHelper.ts:136–174

* Defines getter and setter for every owning side of m:1 and 1:1 relation. This is then used for propagation of * changes to the inverse side of bi-directional relations. Rest of the properties are also defined this way to * achieve dirtiness, which is then used for fast checks whether we need

(meta: EntityMetadata<T>, em: EntityManager)

   * than on its prototype. Thanks to this we still have those properties enumerable (e.g. part of `Object.keys(entity)`).
   */
  private static defineProperties<T extends object>(meta: EntityMetadata<T>, em: EntityManager): void {
    Object.values<EntityProperty<T>>(meta.properties).forEach(prop => {
      const isCollection = [ReferenceKind.ONE_TO_MANY, ReferenceKind.MANY_TO_MANY].includes(prop.kind);
      // oxfmt-ignore
      const isReference = [ReferenceKind.ONE_TO_ONE, ReferenceKind.MANY_TO_ONE].includes(prop.kind) && (prop.inversedBy || prop.mappedBy) && !prop.mapToPk;

      if (isReference) {
        Object.defineProperty(meta.prototype, prop.name, {
          set(val: AnyEntity) {
            EntityHelper.defineReferenceProperty(meta, prop, this, em.getHydrator());
            this[prop.name] = val;
          },
          configurable: true,
        });
        return;
      }

      if (prop.inherited || prop.primary || prop.accessor || prop.persist === false || prop.embedded || isCollection) {
        return;
      }

      Object.defineProperty(meta.prototype, prop.name, {
        set(val) {
          Object.defineProperty(this, prop.name, {
            get() {
              return this.__helper?.__data[prop.name];
            },
            set(val) {
              this.__helper.__data[prop.name] = val;
            },
            enumerable: true,
            configurable: true,
          });
          this.__helper.__data[prop.name] = val;
        },
        configurable: true,
      });
    });
  }

  static defineCustomInspect<T extends object>(meta: EntityMetadata<T>): void {
    // @ts-ignore