Validation Lifcylehook

lifecycle.js

const utils = require("@strapi/utils");
const { ApplicationError } = utils.errors;

const isDisconnecting = (disconnectArray, entityValue) => {
  return disconnectArray.length && entityValue !== null;
};

module.exports = {
  async beforeUpdate(event) {
    const { data, where } = event.params;
    const entity = await strapi.entityService.findOne(event.model.uid, where.id, {
      populate: { owner: true },
    });
    if (data.owner) {
      if (isDisconnecting(data.owner.disconnect, entity.owner) || entity.owner === null) {
        throw ApplicationError("Test");
      }
    }
  },
};