protoc-gen-sqlmodel

A protoc plugin for producing sqlmodel classes. Meant to manage multi-language projects with a single source of truth called protobuf. Generate SQLModel from your schema and manage your DB with alembic.

Install

Add to your project:

uv add protoc-gen-sqlmodel

Then configure like a regular buf plugin in a bug.gen.yaml file:

version: v2
inputs:
  - directory: proto
plugins:
  - local: protoc-gen-sqlmodel
    out: gen

Usage

Run with protoc or (preferred) with uv run buf-generate.

Features

To mark a model as a table, include the following extension in your proto files:

syntax = "proto3";

package example.sqlmodel;

import "google/protobuf/descriptor.proto";

// Marks a protobuf message as a SQLModel table.
extend google.protobuf.MessageOptions {
  bool table = 50001;
}

And mark the message schema as:

syntax = "proto3";

package example.models;

import "sqlmodel_extensions.proto";

message Entity {
  option (example.sqlmodel.table) = true;
}

The generated SQLModel will be marked as a table and you can use it directly with alembic for DB management.

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