talk/models/schema/action.js

const mongoose = require('../../services/mongoose');
const uuid = require('uuid');
const Schema = mongoose.Schema;
const ACTION_TYPES = require('../enum/action_types');
const ITEM_TYPES = require('../enum/item_types');

const Action = new Schema(
  {
    id: {
      type: String,
      default: uuid.v4,
      unique: 1,
      index: 1,
    },
    action_type: {
      type: String,
      enum: ACTION_TYPES,
    },
    item_type: {
      type: String,
      enum: ITEM_TYPES,
    },
    item_id: {
      type: String,
      index: 1,
    },
    user_id: String,

    // The element that summaries will additionally group on in addtion to their action_type, item_type, and
    // item_id.
    group_id: String,

    // Additional metadata stored on the field.
    metadata: Schema.Types.Mixed,
  },
  {
    timestamps: {
      createdAt: 'created_at',
      updatedAt: 'updated_at',
    },
  }
);

// Indexes for listing users actions.
Action.index({ user_id: 1, item_type: 1 }, { background: true });

module.exports = Action;