feat: Add native Cloudflare D1 database driver support

Cargo.toml

@@ -28,6 +28,7 @@ features = [
     "postgres-array",
     "postgres-vector",
     "sea-orm-internal",
+    "d1",
 ]
 rustdoc-args = ["--cfg", "docsrs"]
 
@@ -85,6 +86,7 @@ tracing = { version = "0.1", default-features = false, features = [
 ] }
 url = { version = "2.2", default-features = false }
 uuid = { version = "1", default-features = false, optional = true }
+worker = { version = "0.7", default-features = false, optional = true }
 
 [dev-dependencies]
 dotenv = "0.15"
@@ -105,6 +107,7 @@ tracing-subscriber = { version = "0.3.17", features = ["env-filter"] }
 uuid = { version = "1", features = ["v4"] }
 
 [features]
+d1 = ["worker/d1"]
 debug-print = []
 default = [
     "macros",

examples/d1_example/Cargo.toml

@@ -0,0 +1,32 @@
+[package]
+authors      = ["Sea ORM Contributors"]
+edition      = "2024"
+name         = "sea-orm-d1-example"
+publish      = false
+rust-version = "1.85.0"
+version      = "0.1.0"
+
+[workspace]
+
+[package.metadata.release]
+release = false
+
+# https://github.com/rustwasm/wasm-pack/issues/1247
+[package.metadata.wasm-pack.profile.release]
+wasm-opt = false
+
+[lib]
+crate-type = ["cdylib"]
+path       = "src/lib.rs"
+
+[dependencies]
+serde      = { version = "1", features = ["derive"] }
+serde_json = "1"
+
+worker = { version = "0.7", features = ["d1"] }
+
+sea-orm = { path = "../../", default-features = false, features = [
+    "d1",
+    "with-json",
+    "macros",
+] }

examples/d1_example/README.md

@@ -0,0 +1,97 @@
+# Sea-ORM D1 Example
+
+This example demonstrates how to use Sea-ORM with Cloudflare D1.
+
+## Prerequisites
+
+- [Rust](https://rustup.rs/) installed
+- [wasm-pack](https://rustwasm.github.io/wasm-pack/installer/) installed
+- [Wrangler](https://developers.cloudflare.com/workers/cli-wrangler/install-update/) CLI installed
+
+## Setup
+
+### 1. Create a D1 Database
+
+Create a D1 database in your Cloudflare Workers project:
+
+```bash
+wrangler d1 create sea-orm-d1-example
+```
+
+### 2. Configure wrangler.toml
+
+Add the D1 binding to your `wrangler.toml`:
+
+```toml
+name = "sea-orm-d1-example"
+compatibility_date = "2025-01-01"
+
+[[d1_databases]]
+binding = "DB"
+database_name = "sea-orm-d1-example"
+database_id = "your-database-id"
+```
+
+### 3. Create the Schema
+
+Create a `schema.sql` file:
+
+```sql
+CREATE TABLE IF NOT EXISTS cake (
+    id INTEGER PRIMARY KEY AUTOINCREMENT,
+    name TEXT NOT NULL
+);
+```
+
+### 4. Initialize the Database
+
+Run the migrations:
+
+```bash
+wrangler d1 execute sea-orm-d1-example --file=./schema.sql --remote
+```
+
+## Development
+
+### Build
+
+```bash
+wasm-pack build --target web --out-dir ./dist
+```
+
+### Deploy
+
+```bash
+wrangler deploy
+```
+
+## API Endpoints
+
+- `GET /cakes` - List all cakes
+- `POST /cakes` - Create a new cake (`{"name": "Chocolate"}`)
+- `GET /cakes/:id` - Get a cake by ID
+- `DELETE /cakes/:id` - Delete a cake
+
+## Example Usage
+
+```bash
+# List all cakes
+curl https://your-worker.dev/cakes
+
+# Create a cake
+curl -X POST https://your-worker.dev/cakes \
+  -H "Content-Type: application/json" \
+  -d '{"name": "Chocolate Cake"}'
+
+# Get a cake
+curl https://your-worker.dev/cakes/1
+
+# Delete a cake
+curl -X DELETE https://your-worker.dev/cakes/1
+```
+
+## Notes
+
+- D1 uses SQLite-compatible SQL syntax
+- D1 connections require direct access via `as_d1_connection()` because `wasm-bindgen` futures are not `Send`
+- Streaming is not supported for D1; use `query_all()` instead of `stream_raw()`

examples/d1_example/src/cake.rs

@@ -0,0 +1,21 @@
+//! Cake entity for D1 example
+
+use sea_orm::entity::prelude::*;
+
+#[derive(Clone, Debug, PartialEq, DeriveEntityModel)]
+#[sea_orm(table_name = "cake")]
+pub struct Model {
+    #[sea_orm(primary_key)]
+    pub id: i32,
+    #[sea_orm(column_name = "name")]
+    pub name: String,
+    #[sea_orm(column_name = "price")]
+    pub price: Option<f64>,
+    #[sea_orm(column_name = "category")]
+    pub category: Option<String>,
+}
+
+#[derive(Copy, Clone, Debug, EnumIter, DeriveRelation)]
+pub enum Relation {}
+
+impl ActiveModelBehavior for ActiveModel {}