feat: add typed table access with PostgrestTable and TableColumn by spydon · Pull Request #1634 · supabase/supabase-flutter

spydon · 2026-07-22T16:02:43Z

What kind of change does this PR introduce?

Feature (draft for design discussion). This is layer 1 of a plan to make query results type-safe so users never have to handle Map<String, dynamic>. It adds the runtime primitives to postgrest and supabase; a schema code generator that emits row extension types, table definitions and column tokens is a possible follow-up (layer 2), but everything here is also usable hand-written.

What is the current behavior?

Every query resolves to PostgrestList/PostgrestMap (raw Map<String, dynamic> shapes). The only typing affordance is withConverter, which can only be applied at the end of a chain, and filters, stream(), and mutations are stringly typed throughout.

What is the new behavior?

A typed, opt-in parallel surface next to the existing string-based API (which is unchanged):

extension type Book(Map<String, dynamic> json) {
  int get id => json['id'] as int;
  String get title => json['title'] as String;
}

class Books {
  static const table = PostgrestTable('books', Book.new);
  static const id = TableColumn<int>('id');
  static const title = TableColumn<String>('title');
}

final List<Book> books = await supabase
    .table(Books.table)
    .select()
    .where(Books.id.gt(10))
    .where(Books.title.like('%Dart%'))
    .order(Books.title, ascending: true);

final Book book =
    await supabase.table(Books.table).insert({'title': 'foo'}).select().single();

supabase
    .table(Books.table)
    .stream(primaryKey: [Books.id])
    .filter(Books.status.eq(true))
    .listen((List<Book> books) { /* ... */ });

PostgrestTable<Row> describes a table plus its row converter; client.table(...) (on PostgrestClient, SupabaseClient and SupabaseQuerySchema) is the typed counterpart of from(...).
TableColumn<Value> carries the column name and value type. Filter methods live on the column (Books.id.eq(5)), because that is the only shape where Dart inference actually rejects a wrong value type; builder.eq(column, value) style would silently infer the common supertype. Text-only filters (like, textSearch, regex) are an extension on TableColumn<String>.
where(...) applies a ColumnFilter (chain for AND), whereAny([...]) builds an or=(...) group with proper quoting, and .not() negates a filter. ColumnFilter is a sealed hierarchy with one class per operator (EqFilter, InListFilter, LikeFilter, RangeLtFilter, ..., grouped under sealed parents like ComparisonFilter), so consumers switch on the filter type itself exhaustively; operator strings only appear at the URL boundary.
The typed builders (PostgrestTypedQueryBuilder → PostgrestTypedFilterBuilder → PostgrestTypedTransformBuilder) are thin wrappers around the untyped ones, so all request building, retry, isolate decoding and error handling stays in one place. single(), maybeSingle() and count() keep the row type (Row, Row?, PostgrestResponse<List<Row>>).
stream() gets a typed counterpart emitting List<Row> with typed primary keys and filters (named filter because Stream.where already exists).

Extension types over the decoded JSON map are the recommended row representation: conversion is a cast (no per-row parse cost), partial selects and embedded relations work naturally, and unknown columns are ignored. Regular data classes with fromJson work as well.

Deliberately not included yet, to keep the surface reviewable: typed csv/geojson/explain/head/dryRun passthroughs, typed rpc, typed Insert/Update value types (planned as generated companion types in layer 2), and typed OR composition beyond whereAny. Dropping to from() covers all of these today.

Additional context

All new symbols are registered in sdk-compliance.yaml; the symbol, drift and schema checks from supabase/sdk pass locally.
New unit tests run fully mocked (no PostgREST/realtime infra needed): packages/postgrest/test/typed_query_test.dart verifies each ColumnFilter builds the same URL as its untyped counterpart, and packages/supabase/test/mock_test.dart covers typed select and typed streams.

Linear: SDK-1361

Summary by CodeRabbit

New Features
- Added experimental typed table access for PostgREST and Supabase.
- Added compile-time checked column filters for comparisons, ranges, containment, text search, and null handling.
- Added typed query operations including selection, mutations, counts, ordering, pagination, and single-row retrieval.
- Added typed realtime streams with ordering, limits, and filtering.
- Added typed row conversion for query and stream results.
Tests
- Added comprehensive coverage for typed queries, filters, mutations, counts, streams, and realtime behavior.

coderabbitai · 2026-07-22T16:02:51Z

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Reviewing files that changed from the base of the PR and between 2769e6c and 7c729d1.

📒 Files selected for processing (5)

packages/postgrest/lib/src/postgrest_table.dart
packages/postgrest/lib/src/postgrest_typed_transform_builder.dart
packages/postgrest/test/typed_query_test.dart
packages/supabase/lib/src/supabase_typed_stream_builder.dart
packages/supabase/test/mock_test.dart

🚧 Files skipped from review as they are similar to previous changes (4)

packages/supabase/test/mock_test.dart
packages/postgrest/lib/src/postgrest_typed_transform_builder.dart
packages/postgrest/lib/src/postgrest_table.dart
packages/supabase/lib/src/supabase_typed_stream_builder.dart

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📝 Walkthrough

Walkthrough

The PR adds experimental typed table APIs for PostgREST and Supabase. It provides typed queries, filters, mutations, transformations, realtime streams, row conversion, public exports, tests, and SDK compliance entries.

Changes

Typed PostgREST and Supabase APIs

Layer / File(s)	Summary
Typed table and filter contracts `packages/postgrest/lib/src/postgrest_table.dart`	Defines typed tables, columns, filter constructors, filter hierarchies, range and text filters, containment filters, and negation.
PostgREST typed builder execution `packages/postgrest/lib/src/postgrest_typed_*.dart`	Adds typed response conversion, future behavior, query operations, transformations, mutations, counts, and typed filter application.
PostgREST typed entrypoint and coverage `packages/postgrest/lib/postgrest.dart`, `packages/postgrest/lib/src/postgrest.dart`, `packages/postgrest/test/typed_query_test.dart`	Exports the typed builder API, adds `PostgrestClient.table`, and tests typed queries, filters, transforms, mutations, streams, and counts.
Supabase typed query and realtime builders `packages/supabase/lib/src/supabase_client.dart`, `packages/supabase/lib/src/supabase_query_schema.dart`, `packages/supabase/lib/src/supabase_typed_*.dart`, `packages/supabase/lib/supabase.dart`	Adds typed table access, typed query and stream builders, row conversion, supported realtime filters, and public exports.
Supabase validation and SDK registration `packages/supabase/test/mock_test.dart`, `packages/supabase/test/stream_filter_test.dart`, `sdk-compliance.yaml`	Tests typed table access and realtime filters and registers typed symbols in the SDK compliance matrix.

Estimated code review effort: 4 (Complex) | ~60 minutes

Merge Risk: 🔵 Low · up to 7c729

The PR adds typed table queries and mutations, but typed mutation calls do not provide the same cancellation and retry controls available through the existing API. This may leave an in-flight mutation active when callers need to stop it or adjust recovery behavior, so the change is mergeable with explicit owner awareness or follow-up.

Sequence Diagram(s)

sequenceDiagram
  participant SupabaseClient
  participant SupabaseTypedQueryBuilder
  participant SupabaseTypedStreamFilterBuilder
  participant SupabaseStreamBuilder
  participant Realtime
  SupabaseClient->>SupabaseTypedQueryBuilder: table(PostgrestTable)
  SupabaseTypedQueryBuilder->>SupabaseTypedStreamFilterBuilder: stream(primaryKey)
  SupabaseTypedStreamFilterBuilder->>SupabaseStreamBuilder: apply typed filters
  SupabaseStreamBuilder->>Realtime: subscribe to changes
  Realtime-->>SupabaseTypedStreamFilterBuilder: receive JSON rows
  SupabaseTypedStreamFilterBuilder-->>SupabaseClient: deliver converted rows

Suggested reviewers: dshukertjr

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly and concisely describes the main change: adding typed table access through PostgrestTable and TableColumn. It matches the pull request objectives and changeset.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check. Docstring coverage is scoped to functions touched by this diff. Analyzed 0 functions across 0…
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

Full details: Docstring Coverage

Explanation

No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check. Docstring coverage is scoped to functions touched by this diff. Analyzed 0 functions across 0 files. (5 skipped: 5 unsupported.)

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Commit unit tests in branch feat/typed-table-access

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# Conflicts: # sdk-compliance.yaml

# Conflicts: # packages/supabase/lib/src/supabase_client.dart # packages/supabase/test/mock_test.dart # sdk-compliance.yaml

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Actionable comments posted: 2

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Inline comments:
In `@packages/postgrest/lib/src/postgrest_table.dart`:
- Around line 198-203: Update the doc comment for NegatedFilter.not() to
explicitly state that calling it on an already negated filter throws StateError,
while preserving the existing usage example.

In `@packages/supabase/lib/src/supabase_typed_stream_builder.dart`:
- Line 28: Change the default value of the ascending parameter in the typed
order builder to true so typed .order(column) calls match the string API’s
ascending default, and add a regression test covering the typed default-order
behavior.

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📒 Files selected for processing (16)

packages/postgrest/lib/postgrest.dart
packages/postgrest/lib/src/postgrest.dart
packages/postgrest/lib/src/postgrest_table.dart
packages/postgrest/lib/src/postgrest_typed_builder.dart
packages/postgrest/lib/src/postgrest_typed_filter_builder.dart
packages/postgrest/lib/src/postgrest_typed_query_builder.dart
packages/postgrest/lib/src/postgrest_typed_transform_builder.dart
packages/postgrest/test/typed_query_test.dart
packages/supabase/lib/src/supabase_client.dart
packages/supabase/lib/src/supabase_query_schema.dart
packages/supabase/lib/src/supabase_typed_query_builder.dart
packages/supabase/lib/src/supabase_typed_stream_builder.dart
packages/supabase/lib/supabase.dart
packages/supabase/test/mock_test.dart
packages/supabase/test/stream_filter_test.dart
sdk-compliance.yaml

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…n already negated

…#1635) ## What kind of change does this PR introduce? Feature (draft, layer 2 of the typed table access work, stacked on #1634). Adds a new `supabase_typegen` package: a standalone code generator that turns a database schema into the typed table definitions introduced in #1634, so users get the fully typed surface without writing any of it by hand. Linear: SDK-1362 ## What is the new behavior? ```sh supabase gen types --lang dart --local > lib/supabase_schema.g.dart ``` The CLI runs postgrest-typegen's introspection in-process against the database and hands the language-neutral `GeneratorMetadata` document, the intermediate representation of [`@supabase/postgrest-typegen`](https://github.com/supabase/sdk/tree/main/packages/postgrest-typegen) that its TypeScript, Go, Swift, and Python generators also consume, to this tool over stdin. The tool emits one Dart file containing, per table: - a zero-cost row extension type over the decoded JSON map with typed getters (`DateTime` parsing, `double`/`num` coercion, `List` casts, Postgres enum mapping), - `Insert` and `Update` value extension types that implement `Map<String, dynamic>`, with required parameters derived from `NOT NULL`-without-default columns and null-aware omission for everything else; explicit SQL NULL writes go through generated `set…ToNull` copy methods that only exist for nullable, writable columns, - a `PostgrestTable` definition plus `TableColumn` tokens for compile-time checked filters, - Dart enums for Postgres enums with wire-name mapping (`toString` returns the wire name so enum values work directly in filters). See `packages/supabase_typegen/test/goldens/supabase_schema.dart` for what the output looks like for the fixture schema. Design choices worth reviewing: - **Introspection source**: the `GeneratorMetadata` contract of `@supabase/postgrest-typegen` (version 1, as shipped in the released 0.2.0 and embedded in postgres-meta v0.99.0). The CLI produces the document by running the package's `introspect()` in-process against the local database; there is no postgres-meta dependency. The document comes straight from the database catalog, so the output is exact where API-derived descriptions are lossy: `NOT NULL` columns with a database default read as non-nullable but stay optional on insert, identity columns are recognized, and `GENERATED ALWAYS` columns appear in the row type but are excluded from the insert and update types. Structural validation rejects non-matching documents. - **Relation and column writability**: tables and foreign tables emit the full surface; views gate `Insert` and `Update` independently on `is_insert_enabled` and `is_update_enabled` (falling back to `is_updatable` for documents predating the flags), so a view writable only through an INSTEAD OF INSERT trigger gets exactly an insert type; materialized views are read-only; non-updatable view columns read but are excluded from writes. This mirrors the TypeScript generator's semantics. - **Exact enum resolution**: a column's enum type resolves by its `type_schema` plus type name, so same-named enums in different schemas cannot be confused. - **Canonical ordering**: columns are emitted in the order `sortGeneratorMetadata` produces (name order within a table), matching every other postgrest-typegen generator and keeping output insensitive to column declaration order. - **Naming**: `books` emits `BooksRow`/`BooksInsert`/`BooksUpdate` plus a `Books` namespace class (no English singularization, so names stay predictable). Identifiers are sanitized against Dart reserved words and `Map` member names with a `$` suffix, and collisions are deduplicated. - **Lint-clean output**: the emitted code (checked in as a golden) passes `supabase_lints` and DCM with zero issues, including the strict extension type rules. ## Additional context - The metadata fixture is regenerated from a real introspection and stays reproducible: `test/fixtures/seed.sql` applied to a disposable Postgres container, introspected with the released `@supabase/postgrest-typegen@0.2.0` via `tool/regenerate_fixture.ts`. - CLI exposure as `supabase gen types --lang dart` is a small follow-up on supabase/cli#6404, which already runs postgrest-typegen's `introspect()` in-process: the CLI serializes the sorted document and pipes it to `dart run supabase_typegen` over stdin, the tool's only input channel. No pg-meta container, no metadata file on disk, and no user-facing json output language are involved (the earlier container-based supabase/cli#6230 is closed as superseded). - The package is excluded from the SDK compliance scan via `.sdk-parse-ignore` since it is a development-time tool, not SDK client surface; the symbol, drift and schema checks pass locally against the base branch. - `supabase_typegen` is added to the CI dart test matrix; tests are fully mocked/fixture-based (introspection unit tests over the checked-in metadata fixture, a whitespace-insensitive golden comparison with a `tool/regenerate_goldens.dart` refresh script, and behavior tests that run the generated golden code against a mock HTTP client to verify wire formats end to end). - `publish_to: none` until the API settles.  ## Summary by CodeRabbit * **New Features** * Added a Dart generator for strongly typed Supabase tables, rows, inserts, updates, columns, relationships, views, and Postgres enums. * Added the `supabase_typegen` command-line tool, accepting metadata through standard input and writing generated code to the terminal or a file. * Added safe handling for dates, timestamps, enums, arrays, comments, and reserved identifiers. * **Documentation** * Updated usage guidance, schema-target behavior, generated-code examples, options, and limitations. * **Tests** * Added comprehensive coverage for generation, parsing, serialization, views, relationships, enums, and typed data access.

This was referenced Jul 23, 2026

Generate Dart Types from Database Schema #139

Open

feat: add supabase_typegen package generating typed table definitions #1635

Merged

spydon added 6 commits July 23, 2026 13:48

feat: add typed table access with PostgrestTable and TableColumn

8939c92

chore: address DCM lint warnings

2cac6e2

refactor: make ColumnFilter a sealed hierarchy with operator enums

9b4170e

refactor: one sealed ColumnFilter class per operator

03af7a3

fix(postgrest): review fixes for typed filters and asStream

9fdbc8e

feat: mark the typed table access API as experimental

6a64143

spydon force-pushed the feat/typed-table-access branch from 17d12c1 to 6a64143 Compare July 23, 2026 11:48

spydon added 4 commits August 5, 2026 09:55

Merge remote-tracking branch 'origin/main' into feat/typed-table-access

967a276

# Conflicts: # sdk-compliance.yaml

test(supabase): match the extension type style of the other typed tests

abd8e1f

Merge remote-tracking branch 'origin/main' into feat/typed-table-access

d7f1bd4

# Conflicts: # packages/supabase/lib/src/supabase_client.dart # packages/supabase/test/mock_test.dart # sdk-compliance.yaml

Merge remote-tracking branch 'origin/main' into feat/typed-table-access

f399590

spydon marked this pull request as ready for review September 1, 2026 08:04

spydon requested a review from a team as a code owner September 1, 2026 08:05

Merge branch 'main' into feat/typed-table-access

2769e6c

coderabbitai Bot reviewed Sep 1, 2026

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Comment thread packages/postgrest/lib/src/postgrest_table.dart

Comment thread packages/supabase/lib/src/supabase_typed_stream_builder.dart Outdated

grdsdev approved these changes Sep 1, 2026

View reviewed changes

fix: default typed order to ascending and document not() throwing whe…

7c729d1

…n already negated

spydon enabled auto-merge (squash) September 1, 2026 09:05

spydon merged commit f0b9366 into main Sep 1, 2026
42 of 43 checks passed

spydon deleted the feat/typed-table-access branch September 1, 2026 09:09

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feat: add typed table access with PostgrestTable and TableColumn - #1634

feat: add typed table access with PostgrestTable and TableColumn#1634
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What kind of change does this PR introduce?

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