ObjectionJS Postgres SQL Save JS Dates with JsonSchema "date-time" String Validation

ExtendedObjectionModel.js

import { Model } from "objection";
import _ from "lodash";

export class ExtendedObjectionModel extends Model {
  // Use this instead of Objection's Model when making your models to fix the "is not a string" error you get when saving a JS date object to a psql datetime (timestamp) column.
  // This is a WIP you may need to make some modifications.
  // The main idea is to check those fields which we said should be "date-time" formatted strings in their model's jsonSchema before validation runs. If the field is a JS date, convert it to a string now before running real validation.
  $beforeValidate(jsonSchema, json, opt) {
    _.each(jsonSchema.properties, (schema, propertyName) => {
      if (
        schema &&
        typeof schema.format !== "undefined" &&
        schema.format === "date-time"
      ) {
        const valueToValidate = json[propertyName];
        if (valueToValidate !== null && _.isDate(valueToValidate)) {
          json[propertyName] = valueToValidate.toISOString();
        }
      }
    });
    return jsonSchema;
  }
}