eldarseitabla

Business Card - eldar.seitabla.com

Tech stack:

• React.js
• AWS Amplify
• DynamoDB
• GraphQL
• GitHub
• CI/CD (Dev/Prod)

eldarseitabla

Modified Preorder Tree Traversal

Hierarchical data metrics that allows fast read operations on tree like structures.

Based on Left and Right fields that are set during tree traversal. When entered into node value is set to it's Left, when exiting node value is set to it's Right.

Sample implementation

eldarseitabla

/*
 * Migration
 */
'use strict';
module.exports = {
  up: function(queryInterface, Sequelize) {
    return queryInterface.createTable('Users', {
      firstName: {
        type: Sequelize.STRING
      },

eldarseitabla

RBAC - (role based access control) schemas in mysql, postgres and sqlite

This is data shemas for build RBAC

• PostgreSQL shema
• MySQL shema
• Sqlite shema