GoCryptoTrader package Database

This database package is part of the GoCryptoTrader codebase.

This is still in active development

You can track ideas, planned features and what's in progress on this Trello board: https://trello.com/b/ZAhMhpOy/gocryptotrader.

Join our slack to discuss all things related to GoCryptoTrader! GoCryptoTrader Slack

Current Features for database package

• Establishes & Maintains database connection across program life cycle
• Migration handed by Goose
• Model generation handled by SQLBoiler

How to use

Prerequisites

SQLBoiler

go get -u github.com/thrasher-corp/sqlboiler

Postgres Driver

go get -u github.com/thrasher-corp/sqlboiler/drivers/sqlboiler-psql

SQLite Driver

go get -u github.com/thrasher-corp/sqlboiler-sqlite3

Configuration

The database configuration struct is currently:

type Config struct {
	Enabled                   bool   `json:"enabled"`
	Verbose                   bool   `json:"verbose"`
	Driver                    string `json:"driver"`
	drivers.ConnectionDetails `json:"connectionDetails"`
}

And Connection Details:

type ConnectionDetails struct {
	Host     string `json:"host"`
	Port     uint16 `json:"port"`
	Username string `json:"username"`
	Password string `json:"password"`
	Database string `json:"database"`
	SSLMode  string `json:"sslmode"`
}

With an example configuration being:

 "database": {
  "enabled": true,
  "verbose": true,
  "driver": "postgres",
  "connectionDetails": {
   "host": "localhost",
   "port": 5432,
   "username": "gct-dev",
   "password": "gct-dev",
   "database": "gct-dev",
   "sslmode": "disable"
  }
 },

Create and Run migrations

Migrations are created using a modified version of Goose

A helper tool sits in the ./cmd/dbmigrate folder that includes the following features:

• Check current database version with the "status" command

dbmigrate -command status

• Create a new migration

dbmigrate -command "create" -args "model"

This will create a folder in the ./database/migration folder that contains postgres.sql and sqlite.sql files

• Run dbmigrate command with -command up

dbmigrate -command "up"

dbmigrate provides a -migrationdir flag override to tell it what path to look in for migrations

Note: its highly recommended to backup any data before running migrations against a production database especially if you are running SQLite due to alter table limitations

Adding a new model

Model's are generated using SQLBoiler A helper tool has been made located in gen_sqlboiler_config that will parse your GoCryptoTrader config and output a SQLBoiler config

gen_sqlboiler_config

By default this will look in your gocryptotrader data folder and default config, these can be overwritten along with the location of the sqlboiler generated config

-config "configname.json"
-datadir "~/.gocryptotrader/"
-outdir "~/.gocryptotrader/"

Generate a new model that gets placed in ./database/models/ folder

Linux:

sqlboiler -o database/models/postgres -p postgres --no-auto-timestamps --wipe psql 

Windows:

sqlboiler -o database\\models\\postgres -p postgres --no-auto-timestamps --wipe psql

Helpers have been provided in the Makefile for linux users

make gen_db_models

And in the contrib/sqlboiler.cmd for windows users

Adding a Repository

• Create Repository directory in github.com/thrasher-corp/gocryptotrader/database/repository/

DBSeed helper

A helper tool cmd/dbseed has been created for assisting with data migration

Contribution

Please feel free to submit any pull requests or suggest any desired features to be added.

When submitting a PR, please abide by our coding guidelines:

• Code must adhere to the official Go formatting guidelines (i.e. uses gofmt).
• Code must be documented adhering to the official Go commentary guidelines.
• Code must adhere to our coding style.
• Pull requests need to be based on and opened against the master branch.

Donations

If this framework helped you in any way, or you would like to support the developers working on it, please donate Bitcoin to:

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