tg-migrator 0.2.0

# tg_migrator

tg_migrator is a migration tool for managing schema changes in graph databases, specifically designed to work with Tigergraph. Inspired by Alembic, tg_migrator offers a familiar interface for those who have worked with database migration tools in the SQL world but tailored for the unique requirements of graph databases.

## Table of Contents

• [Introduction](#introduction)

• [Features](#features)

• [Installation](#installation)

• [Quick Start](#quick-start)

• [Usage](#usage) - [Creating Migrations](#creating-migrations) - [Applying Migrations](#applying-migrations) - [Rolling Back Migrations](#rolling-back-migrations)

• [Configuration](#configuration)

• [Contributing](#contributing)

• [License](#license)

## Introduction

tg_migrator helps you to version control your Tigergraph schema changes. Whether you’re working on a single project or across multiple environments, tg_migrator ensures that your graph schema changes are tracked and reproducible.

## Features

• Schema Versioning: Track changes to your graph schema over time.

• Rollback Support: Easily revert changes if something goes wrong.

• Environment Agnostic: Manage migrations in development, testing, and production environments.

• CLI Interface: Command-line tools to simplify migration tasks.

## Installation

Install tg_migrator using pip: `bash cd dist # choose tg_migrator version wheel file updated one pip install tg_migrator-0.1.2-py3-none-any.whl `

`bash pip install tg_migrator `

## Quick Start

To quickly get started with tg_migrator, follow these steps:

1. Initialize Migration Directory:

   `bash tg_migrator init `

2. Create a New Migration:

   `bash tg_migrator create_version -m "Create vertex abc" `

3. Apply Migrations:

   `bash tg_migrator upgrade all `

## Usage ## Version Management tg_migrator uses a graph-based approach to manage migration versions:

Vertex: Each migration is represented as a tg_migrator vertex. Edges: next_version: Points to the next migration version. previous_version: Points to the previous migration version. active: Each migration vertex holds a status indicating whether it has been applied or not. # Example Schema 


### Creating Migrations

Create a new migration file with a descriptive message:

`bash tg_migrator create -m "Add new vertex type User" `

This will generate a new migration script in your versions directory.

### Applying Migrations

To apply all pending migrations, run:

`bash tg_migrator upgrade all `

This will bring your database schema up to date with the latest changes.

### Rolling Back Migrations

To roll back the most recent migration, specify a specific version to downgrade to:

`bash tg_migrator downgrade <version> `

## Configuration

Configuration options can be specified in a configuration file or via environment variables. Here is an example configuration file:

`ini [tg_migrator] host_name = http://localhost:9000 secret = secret tg_cloud = False graph_name = graph_name `

## License

This project is licensed under the MIT License. See the [LICENSE](License.txt) file for details.

## Author Created by Mohammad Ashraf. You can reach me at [muzain.ashraf@gmail.com].