bigcapital/server/src/models/ViewRole.js

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

export default class ViewRole extends TenantModel {

  /**
   * Virtual attributes.
   */
  static get virtualAttributes() {
    return ['comparators'];
  }

  static get comparators() {
    return [
      'equals', 'not_equal', 'contains', 'not_contain',
    ];
  }

  /**
   * Table name.
   */
  static get tableName() {
    return 'view_roles';
  }

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

    return {
      /**
       * View role model may belongs to view model.
       */
      view: {
        relation: Model.BelongsToOneRelation,
        modelClass: this.relationBindKnex(View.default),
        join: {
          from: 'view_roles.viewId',
          to: 'views.id',
        },
      },

      /**
       * View role model may belongs to resource field model.
       */
      field: {
        relation: Model.BelongsToOneRelation,
        modelClass: this.relationBindKnex(ResourceField.default),
        join: {
          from: 'view_roles.fieldId',
          to: 'resource_fields.id',
        },
      },
    };
  }
}