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https://github.com/l-mario564/drizzle-dbml-generator
Generate DBML markup from your schema defined with Drizzle ORM.
https://github.com/l-mario564/drizzle-dbml-generator
database dbml drizzle-orm generator schema-viewer
Last synced: 13 days ago
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Generate DBML markup from your schema defined with Drizzle ORM.
- Host: GitHub
- URL: https://github.com/l-mario564/drizzle-dbml-generator
- Owner: L-Mario564
- License: mit
- Created: 2023-09-02T04:40:16.000Z (about 1 year ago)
- Default Branch: main
- Last Pushed: 2024-08-22T03:27:21.000Z (3 months ago)
- Last Synced: 2024-10-23T15:41:13.391Z (20 days ago)
- Topics: database, dbml, drizzle-orm, generator, schema-viewer
- Language: TypeScript
- Homepage:
- Size: 132 KB
- Stars: 159
- Watchers: 2
- Forks: 7
- Open Issues: 3
-
Metadata Files:
- Readme: README.md
- License: LICENSE
Awesome Lists containing this project
README
# Drizzle DBML Generator
Generate DBML markup from your schema defined with Drizzle ORM. Works with any dialect.
## Generate DBML
To generate the DBML markup from your schema, all you have to do is run a script that executes the generate function of the dialect you're working with. To do that, you must install `tsx` to run Typescript files, `drizzle-orm` if it's not already installed and `drizzle-dbml-generator` of course.
```bash
# npm
npm i drizzle-orm
npm i -D drizzle-dbml-generator tsx
# yarn
yarn add drizzle-orm
yarn add -D drizzle-dbml-generator tsx
# pnpm
pnpm add drizzle-orm
pnpm add -D drizzle-dbml-generator tsx
```
### Example
**schema.ts**
```ts
import {
boolean,
integer,
pgTable,
primaryKey,
serial,
text,
timestamp,
varchar
} from 'drizzle-orm/pg-core';
import { relations } from 'drizzle-orm';
export const users = pgTable('users', {
id: serial('id').primaryKey(),
registeredAt: timestamp('registered_at').notNull().defaultNow(),
username: varchar('username', { length: 16 }).notNull().unique('uq_users_username'),
bio: text('bio'),
hasBlue: boolean('has_blue').notNull().default(false)
});
export const usersRelations = relations(users, ({ many }) => ({
followers: many(followers, { relationName: 'user_followers' }),
following: many(followers, { relationName: 'user_follows' }),
tweets: many(tweets),
likes: many(likes)
}));
export const followers = pgTable(
'followers',
{
userId: integer('user_id')
.notNull()
.references(() => users.id),
followsUserId: integer('follows_user_id')
.notNull()
.references(() => users.id)
},
(followers) => ({
pk: primaryKey(followers.userId, followers.followsUserId)
})
);
export const followersRelations = relations(followers, ({ one }) => ({
user: one(users, {
fields: [followers.userId],
references: [users.id],
relationName: 'user_followers'
}),
followsUser: one(users, {
fields: [followers.followsUserId],
references: [users.id],
relationName: 'user_follows'
})
}));
export const tweets = pgTable('tweets', {
id: serial('id').primaryKey(),
postedAt: timestamp('posted_at').notNull().defaultNow(),
content: text('content').notNull(),
postedById: integer('posted_by_id')
.notNull()
.references(() => users.id)
});
export const tweetsRelations = relations(tweets, ({ one }) => ({
postedBy: one(users, {
fields: [tweets.postedById],
references: [users.id]
})
}));
export const likes = pgTable(
'likes',
{
likedTweetId: integer('liked_tweet_id')
.notNull()
.references(() => tweets.id),
likedById: integer('liked_by_id')
.notNull()
.references(() => users.id)
},
(likes) => ({
pk: primaryKey(likes.likedById, likes.likedTweetId)
})
);
export const likesRelations = relations(likes, ({ one }) => ({
likedTweet: one(tweets, {
fields: [likes.likedTweetId],
references: [tweets.id]
}),
likedBy: one(users, {
fields: [likes.likedById],
references: [users.id]
})
}));
```
**dbml.ts**
```ts
import * as schema from './schema';
import { pgGenerate } from 'drizzle-dbml-generator'; // Using Postgres for this example
const out = './schema.dbml';
const relational = true;
pgGenerate({ schema, out, relational });
```
Running the following command will generate the file with the DBML:
```bash
# You can add this as a package.json script
tsx dbml.ts
```
**schema.dbml**
```dbml
table users {
id serial [pk, not null, increment]
registered_at timestamp [not null, default: `now()`]
username varchar(16) [not null, unique]
bio text
has_blue boolean [not null, default: false]
}
table followers {
user_id integer [not null]
follows_user_id integer [not null]
indexes {
(user_id, follows_user_id) [pk]
}
}
table tweets {
id serial [pk, not null, increment]
posted_at timestamp [not null, default: `now()`]
content text [not null]
posted_by_id integer [not null]
}
table likes {
liked_tweet_id integer [not null]
liked_by_id integer [not null]
indexes {
(liked_by_id, liked_tweet_id) [pk]
}
}
ref followers_user_id_users_id_fk: followers.user_id > users.id [delete: no action, update: no action]
ref followers_follows_user_id_users_id_fk: followers.follows_user_id > users.id [delete: no action, update: no action]
ref tweets_posted_by_id_users_id_fk: tweets.posted_by_id > users.id [delete: no action, update: no action]
ref likes_liked_tweet_id_tweets_id_fk: likes.liked_tweet_id > tweets.id [delete: no action, update: no action]
ref likes_liked_by_id_users_id_fk: likes.liked_by_id > users.id [delete: no action, update: no action]
```
## Options
**pgGenerate**
| Option | Type | Description |
| ---------- | -------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| schema | PgSchema | An object containing Postgres dialect tables, enums and relations |
| out? | string | The output directory and file name. Uses the current working directory as the root. If not set, it will not write the DBML file. |
| relational | boolean? | If set to true, it will create references based on the relations generated with the `relations` function instead of foreign keys. Useful for databases that don't support foreign keys. Default: `false`. |
**mysqlGenerate**
| Option | Type | Description |
| ---------- | ----------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| schema | MySqlSchema | An object containing MySQL dialect tables and relations |
| out? | string | The output directory and file name. Uses the current working directory as the root. If not set, it will not write the DBML file. |
| relational | boolean? | If set to true, it will create references based on the relations generated with the `relations` function instead of foreign keys. Useful for databases that don't support foreign keys. Default: `false`. |
**sqliteGenerate**
| Option | Type | Description |
| ---------- | ------------ | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| schema | SQLiteSchema | An object containing SQLite dialect tables and relations |
| out? | string | The output directory and file name. Uses the current working directory as the root. If not set, it will not write the DBML file. |
| relational | boolean? | If set to true, it will create references based on the relations generated with the `relations` function instead of foreign keys. Useful for databases that don't support foreign keys. Default: `false`. |
All generate functions return the DBML as a string regardless if a file is written or not, in case you want to do something with the generated DBML.