supabase-schemas

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Per-tenant PostgreSQL schema manager for Supabase.

Run 80+ isolated app schemas inside a single Supabase instance. Each tenant gets its own app_<id> schema with migration tracking and an auth.users view - without paying for multiple Supabase projects.

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Quick start

# Clone and install
git clone https://github.com/nometria/supabase-schemas
cd supabase-schemas
pip install -e .

# Set your database URL
export DATABASE_URL=postgresql://postgres.your-ref:password@aws-0-us-east-1.pooler.supabase.com:5432/postgres

# Create a tenant schema
supabase-schemas create acme-corp

# List all tenant schemas
supabase-schemas list

# Run migrations for a tenant
supabase-schemas migrate acme-corp --migrations-dir ./migrations

# Clone schema structure to a new tenant (no data)
supabase-schemas clone acme-corp acme-staging

# Export a tenant's data to JSON
supabase-schemas export acme-corp --output acme.json

# Drop a tenant schema
supabase-schemas drop acme-corp --force

# Run tests
pytest tests/ -v

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Why

Supabase multi-tenancy via schema-per-tenant is the most cost-effective pattern for building multi-tenant SaaS. But there's no official CLI for it. This fills that gap.

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Install

pip install supabase-schemas

# or from source:
git clone https://github.com/nometria/supabase-schemas
cd supabase-schemas
pip install -e .

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Setup

Set DATABASE_URL to your Supabase direct PostgreSQL connection:

# .env
DATABASE_URL=postgresql://postgres.your-ref:password@aws-0-us-east-1.pooler.supabase.com:5432/postgres

You also need this function in your Supabase SQL:

create or replace function public.ensure_schema_exposed(schema_name text)
returns void language plpgsql security definer as $$
begin
  execute format('create schema if not exists %I', schema_name);
  execute format('grant usage on schema %I to anon, authenticated, service_role', schema_name);
  execute format('alter default privileges in schema %I grant all on tables to anon, authenticated, service_role', schema_name);
end $$;

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Commands

# Create a new tenant schema
supabase-schemas create my-tenant

# Create and run migrations immediately
supabase-schemas create my-tenant --migrations-dir ./migrations

# List all tenant schemas
supabase-schemas list
supabase-schemas list --details   # also shows tables

# Run migrations for an existing schema
supabase-schemas migrate my-tenant --migrations-dir ./migrations

# Clone schema structure from one tenant to another (no data)
supabase-schemas clone acme-prod acme-staging

# Export a tenant's data to JSON
supabase-schemas export my-tenant                    # prints to stdout
supabase-schemas export my-tenant --output dump.json # writes to file

# Drop a schema (DESTRUCTIVE - asks for confirmation)
supabase-schemas drop my-tenant
supabase-schemas drop my-tenant --force   # skip confirmation

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How it works

1. create → calls public.ensure_schema_exposed(schema_name), creates _migrations tracking table, injects auth.users view
2. migrate → reads .sql files sorted alphabetically, skips already-applied, records each in _migrations
3. list → queries information_schema.schemata for all app_* schemas
4. drop → DROP SCHEMA CASCADE (with confirmation prompt)
5. clone → creates target schema, then copies tables (CREATE TABLE ... (LIKE source INCLUDING ALL)), views (rewrites definitions to reference target), and functions (replaces schema qualifiers). No data is copied.
6. export → reads every table in the schema and serializes all rows to JSON with a _manifest header containing schema name, timestamp, per-table row counts, and total rows

Each schema gets: app_<sanitized-id> (lowercase, underscores, app_ prefix).

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Clone details

clone copies the full schema structure without any row data:

• Tables -- uses CREATE TABLE ... (LIKE source INCLUDING ALL) to preserve indexes, constraints, defaults, and sequences
• Views -- reads information_schema.views and rewrites the definition to reference the target schema
• Functions -- reads pg_proc / pg_get_functiondef and replaces the schema qualifier

# Clone production structure into a staging schema
supabase-schemas clone acme-prod acme-staging

# Output:
#   Cloned table: orders
#   Cloned table: products
#   Cloned view: order_summary
#   Cloned function: calculate_total
#   Cloned schema 'app_acme_prod' -> 'app_acme_staging' (2 tables, 1 views, 1 functions, structure only)

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Export details

export dumps all table data to JSON with a manifest:

# Print to stdout
supabase-schemas export acme-prod

# Write to file
supabase-schemas export acme-prod --output acme-backup.json

Output format:

{
  "_manifest": {
    "schema": "app_acme_prod",
    "exported_at": "2025-06-15T12:00:00+00:00",
    "tables": {
      "orders": 42,
      "products": 15
    },
    "total_rows": 57
  },
  "orders": [
    {"id": 1, "total": 99.50, "created_at": "2025-01-01"}
  ],
  "products": [
    {"id": 1, "name": "Widget", "price": 9.99}
  ]
}

Non-JSON-serializable values (bytes, datetime, UUID, Decimal) are automatically converted to strings.

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Immediate next steps

1. Publish to PyPI as supabase-schemas
2. Write blog post: "How to run 80+ isolated Postgres schemas in one Supabase project" - drives SEO + inbound

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Commercial viability

• Low standalone (open source is the right play)
• High as a content marketing asset - "Supabase multi-tenant" is a top-10 searched pattern
• Drives inbound to core platform: "now that you have your schemas sorted, let's self-host the whole thing"

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Example output

Running pytest tests/ -v:

============================= test session starts ==============================
platform darwin -- Python 3.13.9, pytest-9.0.2, pluggy-1.5.0
cachedir: .pytest_cache
rootdir: /tmp/ownmy-releases/supabase-schemas
configfile: pyproject.toml
plugins: anyio-4.12.1, cov-7.1.0
collecting ... collected 4 items

tests/test_schema_manager.py::test_schema_name_format PASSED             [ 25%]
tests/test_schema_manager.py::test_schema_name_sanitizes_special_chars PASSED [ 50%]
tests/test_schema_manager.py::test_import_succeeds_without_psycopg2 PASSED [ 75%]
tests/test_schema_manager.py::test_tenant_id_validation PASSED           [100%]

============================== 4 passed in 0.02s ===============================

See examples/sample-schema-list.txt for what supabase-schemas list output looks like.