bigcapital/server/src/models/SaleEstimate.js

import { Model, mixin } from 'objection';
import TenantModel from 'models/TenantModel';

export default class SaleEstimate extends TenantModel {
  /**
   * Table name
   */
  static get tableName() {
    return 'sales_estimates';
  }

  /**
   * Timestamps columns.
   */
  get timestamps() {
    return ['createdAt', 'updatedAt'];
  }

  /**
   * Relationship mapping.
   */
  static get relationMappings() {
    const ItemEntry = require('models/ItemEntry');
    const Contact = require('models/Contact');

    return {
      customer: {
        relation: Model.BelongsToOneRelation,
        modelClass: Contact.default,
        join: {
          from: 'sales_estimates.customerId',
          to: 'contacts.id',
        },
        filter(query) {
          query.where('contact_service', 'customer');
        }
      },

      entries: {
        relation: Model.HasManyRelation,
        modelClass: ItemEntry.default,
        join: {
          from: 'sales_estimates.id',
          to: 'items_entries.referenceId',
        },
        filter(builder) {
          builder.where('reference_type', 'SaleEstimate');
        },
      },
    };
  }

  /**
   * Model defined fields.
   */
  static get fields() {
    return {
      created_at: {
        label: 'Created at',
        column: 'created_at',
        columnType: 'date',
      },
    };
  }
}