Attempting to implement dynamic selectors in my functions to avoid redundancy

Question

Attempting to implement dynamic selectors in my functions to avoid redundancy

Here is some code I find myself writing frequently for parsing JSON or creating functions.

// Reusable adder functions
async function addImagesToEntity(entityId, fileName, entity) {
  const entity = await db.${entity}.findById(entityId);
  await entity.${entity}Images.push({'fileName':fileName});
  entity.updated = Date.now();
  await entity.save();
  //console.log(entity);
}

// I often repeat this pattern for many of my services, and I'm looking to extend it to cover most frontend and backend functionalities. If I can figure out how to do this, I can have a single "CRUD" service for the majority of my use cases.

I encounter this issue frequently when dealing with complex JSON objects and creating dynamic selectors...

I use ${} because that's how I construct strings dynamically, but I am unable to apply it to functions or naming conventions. I want to be able to use a string variable as a function name or method, which is not currently possible. Thank you to anyone who can assist me with this challenge.

Thank you in advance!

javascript arrays json mongodb typescript

Answer 1

Answer №1

One approach could be to implement a solution using a hashMap that stores individual values for easy access.

const dataMap = {
  'pet': {
    database: "Pet",
    key: 'petImages'
  },
  'account': {
    database: "Account",
    key: 'accountImages'
  },
  'property':{
    database: "Property",
    key: 'propertyImages'
  }
}

async function addImagesToEntity(entityId, fileName, entityType) { // The entityType will correspond to the keys in the object above.
  const {database, key} = dataMap[entityType];
  const entity = await db[database].findById(entityId);
  await entity[key].push({'fileName':fileName});
  entity.updatedAt = Date.now();
  await entity.save();
}

Answer 2

One approach could be to implement a solution using a hashMap that stores individual values for easy access.

const dataMap = {
  'pet': {
    database: "Pet",
    key: 'petImages'
  },
  'account': {
    database: "Account",
    key: 'accountImages'
  },
  'property':{
    database: "Property",
    key: 'propertyImages'
  }
}

async function addImagesToEntity(entityId, fileName, entityType) { // The entityType will correspond to the keys in the object above.
  const {database, key} = dataMap[entityType];
  const entity = await db[database].findById(entityId);
  await entity[key].push({'fileName':fileName});
  entity.updatedAt = Date.now();
  await entity.save();
}

Answer 3

Answer №2

Consider implementing the following function in your code:

async function uploadImages(type, id, fileName) {
  const item = await db[type].findById(id);

  item.updated = Date.now();

  const attributeKey = `${type.toLowerCase()}Images`;
  item[attributeKey].push({ fileName });

  await item.save();
}

async function processUploads() {
  await uploadImages('Property', 2, 'image-02');
  await uploadImages('Account', 3, 'image-03');
  await uploadImages('Pet', 3, 'image-03');
}

You may also want to explore the Factory Pattern for creating reusable components.

If handling more variables, consider using an array for cleaner code. It is recommended to limit functions to three variables for better readability and maintainability, but this can vary based on personal preference.

Answer 4

Consider implementing the following function in your code:

async function uploadImages(type, id, fileName) {
  const item = await db[type].findById(id);

  item.updated = Date.now();

  const attributeKey = `${type.toLowerCase()}Images`;
  item[attributeKey].push({ fileName });

  await item.save();
}

async function processUploads() {
  await uploadImages('Property', 2, 'image-02');
  await uploadImages('Account', 3, 'image-03');
  await uploadImages('Pet', 3, 'image-03');
}

You may also want to explore the Factory Pattern for creating reusable components.

If handling more variables, consider using an array for cleaner code. It is recommended to limit functions to three variables for better readability and maintainability, but this can vary based on personal preference.

Answer 5

Answer №3

Just utilize a single line of code for that task, there is no requirement to enclose it within a function

use db.Pet.updateOne({ _id: petId }, { $push: : { petImages : {'fileName':fileName}}, updated: Date.now() });

Answer 6

Just utilize a single line of code for that task, there is no requirement to enclose it within a function

use db.Pet.updateOne({ _id: petId }, { $push: : { petImages : {'fileName':fileName}}, updated: Date.now() });

Answer 7

Answer №4

Appreciation to all who contributed comments and assistance.

The final version of my code is displayed below, although there is potential for further refinement.

async function addImagesToObject(objId, objType, fileName) {
  const entity = await db[`${objType}`].findById(objId);
  const attribute = `${objType.toLowerCase()}Images`; //<-- setting up selector
  await entity[attribute].push({'fileName':fileName});
  entity.updated = Date.now();
  await entity.save();
}

Answer 8

Appreciation to all who contributed comments and assistance.

The final version of my code is displayed below, although there is potential for further refinement.

async function addImagesToObject(objId, objType, fileName) {
  const entity = await db[`${objType}`].findById(objId);
  const attribute = `${objType.toLowerCase()}Images`; //<-- setting up selector
  await entity[attribute].push({'fileName':fileName});
  entity.updated = Date.now();
  await entity.save();
}

Attempting to implement dynamic selectors in my functions to avoid redundancy

Answer №1

Answer №2

Answer №3

Answer №4

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