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* fix: rewrite relative URLs when syncing to GitHub discussion Relative URLs back to supabse.com won't work in GitHub discussions, so rewrite them back to absolute URLs starting with https://supabase.com * fix: replace all supabase urls with relative urls * chore: add linting for relative urls * chore: bump linter version * Prettier --------- Co-authored-by: Chris Chinchilla <chris.ward@supabase.io>
131 lines
3.7 KiB
Plaintext
131 lines
3.7 KiB
Plaintext
---
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id: 'examples-postgres-on-the-edge'
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title: 'Integrating with Supabase Database (Postgres)'
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description: 'Connecting to Postgres from Edge Functions.'
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subtitle: 'Connect to your Postgres database from Edge Functions.'
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tocVideo: 'cl7EuF1-RsY'
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---
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Connect to your Postgres database from an Edge Function by using the `supabase-js` client.
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You can also use other Postgres clients like [Deno Postgres](https://deno.land/x/postgres)
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---
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## Using supabase-js
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The `supabase-js` client handles authorization with Row Level Security and automatically formats responses as JSON. This is the recommended approach for most applications:
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```ts index.ts
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import { createClient } from 'npm:@supabase/supabase-js@2'
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Deno.serve(async (req) => {
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try {
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const supabase = createClient(
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Deno.env.get('SUPABASE_URL') ?? '',
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Deno.env.get('SUPABASE_PUBLISHABLE_KEY') ?? '',
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{ global: { headers: { Authorization: req.headers.get('Authorization')! } } }
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)
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const { data, error } = await supabase.from('countries').select('*')
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if (error) {
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throw error
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}
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return new Response(JSON.stringify({ data }), {
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headers: { 'Content-Type': 'application/json' },
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status: 200,
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})
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} catch (err) {
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return new Response(String(err?.message ?? err), { status: 500 })
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}
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})
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```
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This enables:
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- Automatic Row Level Security enforcement
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- Built-in JSON serialization
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- Consistent error handling
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- TypeScript support for database schema
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---
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## Using a Postgres client
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Because Edge Functions are a server-side technology, it's safe to connect directly to your database using any popular Postgres client. This means you can run raw SQL from your Edge Functions.
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Here is how you can connect to the database using Deno Postgres driver and run raw SQL. Check out the [full example](https://github.com/supabase/supabase/tree/master/examples/edge-functions/supabase/functions/postgres-on-the-edge).
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<$CodeSample
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path="/edge-functions/supabase/functions/postgres-on-the-edge/index.ts"
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title="Select from table with auth RLS"
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language="typescript"
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/>
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---
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## Using Drizzle
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You can use Drizzle together with [Postgres.js](https://github.com/porsager/postgres). Both can be loaded directly from npm:
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**Set up dependencies in `import_map.json`**:
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```json supabase/functions/import_map.json
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{
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"imports": {
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"drizzle-orm": "npm:drizzle-orm@0.29.1",
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"drizzle-orm/": "npm:/drizzle-orm@0.29.1/",
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"postgres": "npm:postgres@3.4.3"
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}
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}
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```
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**Use in your function**:
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```ts supabase/functions/drizzle/index.ts
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import { drizzle } from 'drizzle-orm/postgres-js'
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import postgres from 'postgres'
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import { countries } from '../_shared/schema.ts'
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const connectionString = Deno.env.get('SUPABASE_DB_URL')!
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Deno.serve(async (_req) => {
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// Disable prefetch as it is not supported for "Transaction" pool mode
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const client = postgres(connectionString, { prepare: false })
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const db = drizzle(client)
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const allCountries = await db.select().from(countries)
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return Response.json(allCountries)
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})
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```
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You can find the full example on [GitHub](https://github.com/thorwebdev/edgy-drizzle).
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---
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## SSL connections
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### Production
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Deployed edge functions are pre-configured to use SSL for connections to the Supabase database. You don't need to add any extra configurations.
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### Local development
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If you want to use SSL connections during local development, follow these steps:
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1. Download the SSL certificate from [Database Settings](/dashboard/project/_/database/settings)
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2. Add to your [local .env file](/docs/guides/functions/secrets), add these two variables:
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```bash
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SSL_CERT_FILE=/path/to/cert.crt # set the path to the downloaded cert
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DENO_TLS_CA_STORE=mozilla,system
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```
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Then, restart your local development server:
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```bash
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supabase functions serve your-function
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```
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