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https://github.com/mattgson/relational-schema

A javascript friendly schema generator for relational databases.
https://github.com/mattgson/relational-schema

Last synced: about 1 month ago
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A javascript friendly schema generator for relational databases.

Host: GitHub
URL: https://github.com/mattgson/relational-schema
Owner: MattGson
License: mit
Created: 2021-04-21T07:14:54.000Z (over 3 years ago)
Default Branch: master
Last Pushed: 2023-02-04T04:44:57.000Z (almost 2 years ago)
Last Synced: 2024-11-08T09:39:27.593Z (2 months ago)
Language: TypeScript
Size: 2.11 MB
Stars: 3
Watchers: 2
Forks: 0
Open Issues: 6
Metadata Files:
- Readme: README.md
- Changelog: CHANGELOG.md
- Contributing: CONTRIBUTING.md
- License: LICENSE
- Code of conduct: CODE_OF_CONDUCT.md

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README

[![npm](https://img.shields.io/npm/v/relational-schema.svg?style=for-the-badge)](https://www.npmjs.com/package/relational-schema)
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[![Github last commit][last-commit]][last-commit-link]
[![Pull Requests Welcome][prs-badge]][prs-link]
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[last-commit]: https://img.shields.io/github/stars/MattGson/relational-schema.svg?style=for-the-badge&logo=github&logoColor=ffffff
[last-commit-link]: https://github.com/MattGson/relational-schema/commits
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[prs-link]: https://github.com/MattGson/relational-schema

> **Easily work with relational databases in Javascript and Typescript**

[Relational-schema](https://mattgson.github.io/relational-schema/) is a utility package to generate a semantic,
complete schema of a relational database (PostgreSQL, MySQL) in Javascript, JSON and other formats.

Works with MySQL and PostgreSQL. SQLite coming soon.

Full docs [here](https://mattgson.github.io/relational-schema/)

### Why Relational-schema?

One of the key benefits of working with relational databases is the strict schema.
Often in our applications we fail to take advantage of this, instead we rely on handwritten simplifications
such as ORM models.

Relational-schema gives TS/JS developers a complete database schema including some nice additions (see below for specs).
The schema can be output in `json`, `es6`, `typescript` and `commonJS` to suit multiple use-cases.

This schema can be used for building better, more automated tooling for working with relational databases in JS.

Projects using Relational-schema

- [Gybson](https://mattgson.github.io/Gybson) - an auto generated, typesafe, flexible query client for working with relational databases in typescript.

---

### Usage

```
npm install relational-schema
```

Create a config file `relation-config.json`

```json
{
"host": "127.0.0.1",
"client": "mysql",
"port": 3306,
"user": "root",
"password": "secure",
"database": "mydb",
"outdir": "src/schemas",
"format": "json"
}
```

```
relations introspect
```

The schema will be generated in `outdir` in the chosen format.

---

### Key features:

#### Full table definitions including:

- columns (names, types, default values, nullability...)
- keys and constraints
- unique-ness
- Typescript type mappings
- table relations (including direction)
- human readable relation alias'
- soft-delete idenfication
- enums

---

### Example output:

```json
{
"database": "tests",
"schema": "tests",
"generatedAt": "2021-04-21T08:41:31.747Z",
"tables": {
"teams": {
"primaryKey": {
"constraintName": "teams_pkey",
"constraintType": "PRIMARY KEY",
"columnNames": ["team_id"]
},
"keys": [{ "constraintName": "teams_pkey", "constraintType": "PRIMARY KEY", "columnNames": ["team_id"] }],
"uniqueKeyCombinations": [["team_id"]],
"relations": [
{
"toTable": "team_members",
"alias": "team_members",
"joins": [{ "fromColumn": "team_id", "toColumn": "team_id" }],
"type": "hasMany"
}
],
"columns": {
"team_id": {
"dbType": "int4",
"columnDefault": "nextval('teams_team_id_seq'::regclass)",
"nullable": false,
"columnName": "team_id",
"tsType": "number"
},
"name": {
"dbType": "varchar",
"columnDefault": null,
"nullable": false,
"columnName": "name",
"tsType": "string"
},
"deleted": {
"dbType": "bool",
"columnDefault": "false",
"nullable": true,
"columnName": "deleted",
"tsType": "boolean"
}
},
"softDelete": {
"dbType": "bool",
"columnDefault": "false",
"nullable": true,
"columnName": "deleted",
"tsType": "boolean"
},
"enums": {
"teams_subscription_level": {
"enumName": "teams_subscription_level",
"values": ["BRONZE", "GOLD", "SILVER"],
"columnName": ""
},
"teams_permissions": { "enumName": "teams_permissions", "values": ["ADMIN", "USER"], "columnName": "" }
}
},
"team_members": {
"primaryKey": {
"constraintName": "team_members_pkey",
"constraintType": "PRIMARY KEY",
"columnNames": ["team_id", "user_id"]
},
"keys": [
{
"constraintName": "team_members_member_post_id_foreign",
"constraintType": "FOREIGN KEY",
"columnNames": ["member_post_id"]
},
{
"constraintName": "team_members_pkey",
"constraintType": "PRIMARY KEY",
"columnNames": ["team_id", "user_id"]
},
{
"constraintName": "team_members_team_id_foreign",
"constraintType": "FOREIGN KEY",
"columnNames": ["team_id"]
},
{
"constraintName": "team_members_user_id_foreign",
"constraintType": "FOREIGN KEY",
"columnNames": ["user_id"]
}
],
"uniqueKeyCombinations": [["team_id", "user_id"]],
"relations": [
{
"toTable": "posts",
"alias": "member_post",
"joins": [{ "fromColumn": "member_post_id", "toColumn": "post_id" }],
"type": "belongsTo"
},
{
"toTable": "teams",
"alias": "team",
"joins": [{ "fromColumn": "team_id", "toColumn": "team_id" }],
"type": "belongsTo"
},
{
"toTable": "users",
"alias": "user",
"joins": [{ "fromColumn": "user_id", "toColumn": "user_id" }],
"type": "belongsTo"
},
{
"toTable": "team_members_positions",
"alias": "team_members_position",
"joins": [
{ "fromColumn": "team_id", "toColumn": "team_id" },
{ "fromColumn": "user_id", "toColumn": "user_id" }
],
"type": "hasOne"
}
],
"columns": {
"team_id": {
"dbType": "int4",
"columnDefault": null,
"nullable": false,
"columnName": "team_id",
"tsType": "number"
},
"user_id": {
"dbType": "int4",
"columnDefault": null,
"nullable": false,
"columnName": "user_id",
"tsType": "number"
},
"member_post_id": {
"dbType": "int4",
"columnDefault": null,
"nullable": true,
"columnName": "member_post_id",
"tsType": "number"
},
"deleted": {
"dbType": "bool",
"columnDefault": "false",
"nullable": true,
"columnName": "deleted",
"tsType": "boolean"
}
},
"softDelete": {
"dbType": "bool",
"columnDefault": "false",
"nullable": true,
"columnName": "deleted",
"tsType": "boolean"
},
"enums": {
"team_members_subscription_level": {
"enumName": "team_members_subscription_level",
"values": ["BRONZE", "GOLD", "SILVER"],
"columnName": ""
},
"team_members_permissions": {
"enumName": "team_members_permissions",
"values": ["ADMIN", "USER"],
"columnName": ""
}
}
},
"team_members_positions": {
"primaryKey": {
"constraintName": "team_members_positions_pkey",
"constraintType": "PRIMARY KEY",
"columnNames": ["team_id", "user_id"]
},
"keys": [
{
"constraintName": "team_members_positions_position_manager_unique",
"constraintType": "UNIQUE",
"columnNames": ["manager", "position"]
},
{
"constraintName": "team_members_positions_pkey",
"constraintType": "PRIMARY KEY",
"columnNames": ["team_id", "user_id"]
},
{
"constraintName": "team_members_positions_team_id_user_id_foreign",
"constraintType": "FOREIGN KEY",
"columnNames": ["team_id", "user_id"]
}
],
"uniqueKeyCombinations": [
["manager", "position"],
["team_id", "user_id"]
],
"relations": [
{
"toTable": "team_members",
"alias": "team_member",
"joins": [
{ "fromColumn": "team_id", "toColumn": "team_id" },
{ "fromColumn": "user_id", "toColumn": "user_id" }
],
"type": "hasOne"
}
],
"columns": {
"team_id": {
"dbType": "int4",
"columnDefault": null,
"nullable": false,
"columnName": "team_id",
"tsType": "number"
},
"user_id": {
"dbType": "int4",
"columnDefault": null,
"nullable": false,
"columnName": "user_id",
"tsType": "number"
},
"position": {
"dbType": "varchar",
"columnDefault": null,
"nullable": false,
"columnName": "position",
"tsType": "string"
},
"manager": {
"dbType": "varchar",
"columnDefault": null,
"nullable": false,
"columnName": "manager",
"tsType": "string"
},
"verified": {
"dbType": "bool",
"columnDefault": "false",
"nullable": true,
"columnName": "verified",
"tsType": "boolean"
}
},
"softDelete": null,
"enums": {
"team_members_positions_subscription_level": {
"enumName": "team_members_positions_subscription_level",
"values": ["BRONZE", "GOLD", "SILVER"],
"columnName": ""
},
"team_members_positions_permissions": {
"enumName": "team_members_positions_permissions",
"values": ["ADMIN", "USER"],
"columnName": ""
}
}
},
"users": {
"primaryKey": {
"constraintName": "users_pkey",
"constraintType": "PRIMARY KEY",
"columnNames": ["user_id"]
},
"keys": [
{
"constraintName": "users_best_friend_id_foreign",
"constraintType": "FOREIGN KEY",
"columnNames": ["best_friend_id"]
},
{ "constraintName": "users_email_unique", "constraintType": "UNIQUE", "columnNames": ["email"] },
{ "constraintName": "users_token_unique", "constraintType": "UNIQUE", "columnNames": ["token"] },
{ "constraintName": "users_pkey", "constraintType": "PRIMARY KEY", "columnNames": ["user_id"] }
],
"uniqueKeyCombinations": [["email"], ["token"], ["user_id"]],
"relations": [
{
"toTable": "users",
"alias": "best_friend",
"joins": [{ "fromColumn": "best_friend_id", "toColumn": "user_id" }],
"type": "belongsTo"
},
{
"toTable": "posts",
"alias": "author_posts",
"joins": [{ "fromColumn": "user_id", "toColumn": "author_id" }],
"type": "hasMany"
},
{
"toTable": "posts",
"alias": "co_author_posts",
"joins": [{ "fromColumn": "user_id", "toColumn": "co_author" }],
"type": "hasMany"
},
{
"toTable": "team_members",
"alias": "team_members",
"joins": [{ "fromColumn": "user_id", "toColumn": "user_id" }],
"type": "hasMany"
},
{
"toTable": "users",
"alias": "users",
"joins": [{ "fromColumn": "user_id", "toColumn": "best_friend_id" }],
"type": "hasMany"
}
],
"columns": {
"user_id": {
"dbType": "int4",
"columnDefault": "nextval('users_user_id_seq'::regclass)",
"nullable": false,
"columnName": "user_id",
"tsType": "number"
},
"best_friend_id": {
"dbType": "int4",
"columnDefault": null,
"nullable": true,
"columnName": "best_friend_id",
"tsType": "number"
},
"email": {
"dbType": "varchar",
"columnDefault": null,
"nullable": false,
"columnName": "email",
"tsType": "string"
},
"first_name": {
"dbType": "varchar",
"columnDefault": null,
"nullable": true,
"columnName": "first_name",
"tsType": "string"
},
"last_name": {
"dbType": "varchar",
"columnDefault": null,
"nullable": true,
"columnName": "last_name",
"tsType": "string"
},
"password": {
"dbType": "varchar",
"columnDefault": null,
"nullable": false,
"columnName": "password",
"tsType": "string"
},
"token": {
"dbType": "varchar",
"columnDefault": null,
"nullable": true,
"columnName": "token",
"tsType": "string"
},
"permissions": {
"dbType": "permissions",
"columnDefault": "'USER'::permissions",
"nullable": true,
"columnName": "permissions",
"tsType": "users_permissions"
},
"subscription_level": {
"dbType": "subscription_level",
"columnDefault": null,
"nullable": true,
"columnName": "subscription_level",
"tsType": "users_subscription_level"
},
"deleted_at": {
"dbType": "timestamptz",
"columnDefault": null,
"nullable": true,
"columnName": "deleted_at",
"tsType": "Date"
}
},
"softDelete": {
"dbType": "timestamptz",
"columnDefault": null,
"nullable": true,
"columnName": "deleted_at",
"tsType": "Date"
},
"enums": {
"users_subscription_level": {
"enumName": "users_subscription_level",
"values": ["BRONZE", "GOLD", "SILVER"],
"columnName": ""
},
"users_permissions": { "enumName": "users_permissions", "values": ["ADMIN", "USER"], "columnName": "" }
}
},
"posts": {
"primaryKey": {
"constraintName": "posts_pkey",
"constraintType": "PRIMARY KEY",
"columnNames": ["post_id"]
},
"keys": [
{
"constraintName": "posts_author_id_foreign",
"constraintType": "FOREIGN KEY",
"columnNames": ["author_id"]
},
{
"constraintName": "posts_co_author_foreign",
"constraintType": "FOREIGN KEY",
"columnNames": ["co_author"]
},
{ "constraintName": "posts_pkey", "constraintType": "PRIMARY KEY", "columnNames": ["post_id"] }
],
"uniqueKeyCombinations": [["post_id"]],
"relations": [
{
"toTable": "users",
"alias": "author_",
"joins": [{ "fromColumn": "author_id", "toColumn": "user_id" }],
"type": "belongsTo"
},
{
"toTable": "users",
"alias": "co_author_",
"joins": [{ "fromColumn": "co_author", "toColumn": "user_id" }],
"type": "belongsTo"
},
{
"toTable": "team_members",
"alias": "team_members",
"joins": [{ "fromColumn": "post_id", "toColumn": "member_post_id" }],
"type": "hasMany"
}
],
"columns": {
"post_id": {
"dbType": "int4",
"columnDefault": "nextval('posts_post_id_seq'::regclass)",
"nullable": false,
"columnName": "post_id",
"tsType": "number"
},
"author": {
"dbType": "varchar",
"columnDefault": null,
"nullable": false,
"columnName": "author",
"tsType": "string"
},
"author_id": {
"dbType": "int4",
"columnDefault": null,
"nullable": false,
"columnName": "author_id",
"tsType": "number"
},
"co_author": {
"dbType": "int4",
"columnDefault": null,
"nullable": true,
"columnName": "co_author",
"tsType": "number"
},
"message": {
"dbType": "varchar",
"columnDefault": null,
"nullable": false,
"columnName": "message",
"tsType": "string"
},
"rating_average": {
"dbType": "float4",
"columnDefault": "'0'::real",
"nullable": true,
"columnName": "rating_average",
"tsType": "number"
},
"created": {
"dbType": "timestamptz",
"columnDefault": "CURRENT_TIMESTAMP",
"nullable": true,
"columnName": "created",
"tsType": "Date"
},
"deleted": {
"dbType": "bool",
"columnDefault": "false",
"nullable": true,
"columnName": "deleted",
"tsType": "boolean"
}
},
"softDelete": {
"dbType": "bool",
"columnDefault": "false",
"nullable": true,
"columnName": "deleted",
"tsType": "boolean"
},
"enums": {
"posts_subscription_level": {
"enumName": "posts_subscription_level",
"values": ["BRONZE", "GOLD", "SILVER"],
"columnName": ""
},
"posts_permissions": { "enumName": "posts_permissions", "values": ["ADMIN", "USER"], "columnName": "" }
}
}
}
}
```

Relational-schema is built on top of trusted open-source projects:

- [Knex](https://github.com/knex/knex)