sequelize/dist/lib/model-manager.js

Sequelize is a promise-based Node.js ORM tool for Postgres, MySQL, MariaDB, SQLite, Microsoft SQL Server, Amazon Redshift and Snowflake’s Data Cloud. It features solid transaction support, relations, eager and lazy loading, read replication and more.

"use strict";
const Toposort = require("toposort-class");
const _ = require("lodash");
class ModelManager {
  constructor(sequelize) {
    this.models = [];
    this.sequelize = sequelize;
  }
  addModel(model) {
    this.models.push(model);
    this.sequelize.models[model.name] = model;
    return model;
  }
  removeModel(modelToRemove) {
    this.models = this.models.filter((model) => model.name !== modelToRemove.name);
    delete this.sequelize.models[modelToRemove.name];
  }
  getModel(against, options) {
    options = _.defaults(options || {}, {
      attribute: "name"
    });
    return this.models.find((model) => model[options.attribute] === against);
  }
  get all() {
    return this.models;
  }
  forEachModel(iterator, options) {
    const models = {};
    const sorter = new Toposort();
    let sorted;
    let dep;
    options = _.defaults(options || {}, {
      reverse: true
    });
    for (const model of this.models) {
      let deps = [];
      let tableName = model.getTableName();
      if (_.isObject(tableName)) {
        tableName = `${tableName.schema}.${tableName.tableName}`;
      }
      models[tableName] = model;
      for (const attrName in model.rawAttributes) {
        if (Object.prototype.hasOwnProperty.call(model.rawAttributes, attrName)) {
          const attribute = model.rawAttributes[attrName];
          if (attribute.references) {
            dep = attribute.references.model;
            if (_.isObject(dep)) {
              dep = `${dep.schema}.${dep.tableName}`;
            }
            deps.push(dep);
          }
        }
      }
      deps = deps.filter((dep2) => tableName !== dep2);
      sorter.add(tableName, deps);
    }
    sorted = sorter.sort();
    if (options.reverse) {
      sorted = sorted.reverse();
    }
    for (const name of sorted) {
      iterator(models[name], name);
    }
  }
}
module.exports = ModelManager;
module.exports.ModelManager = ModelManager;
module.exports.default = ModelManager;
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