如何从父 class 解析的数据中访问属性？

Question

I created a base class that parses a json file:

const fs = require("fs");

class DataRepository {
  constructor() {
    this.filename = "cales_data.json";
    try {
      fs.accessSync(this.filename);
    } catch (error) {
      console.error("data does not exist");
    }
  }

  async getAll() {
    // Open the file called this.filename
    return JSON.parse(
      await fs.promises.readFile(this.filename, {
        encoding: "utf-8",
      })
    );
  }

  async getOneBy(filters) {
    const records = await this.getAll();

    for (let record of records) {
      let found = true;

      for (let key in filters) {
        if (record[key] !== filters[key]) {
          found = false;
        }
      }

      if (found) {
        return record;
      }
    }
  }
}

module.exports = DataRepository;

I don't care for its methods at this point. I just want to be able to access the contents of this.filename = "cales_data.json";

Something like this perhaps:

const DataRepository = require("./repositories/data");

class Address extends DataRepository {
  constructor() {
    super();
    this.Address = DataRepository.Address;
    this.Latitude = DataRepository.Latitude;
    this.Longitude = DataRepository.Longitude;
  }
}

module.exports = Address;

but obviously the above gives me undefined. Is it possible to access those properties inside that JSON file in that base class this way? If so, how?

Answer 1

Simple answer: no. "This" can never result to anything than a value on the class memory stack. You have to handle this different:-)