Fix/rpc no params react native

.husky/commit-msg

@@ -1,4 +1,4 @@
-npx --no-install commitlint --edit $1 || {
+./node_modules/.bin/commitlint --edit "$1" || {
   echo ""
   echo "💡 Tip: Use 'npm run commit' for guided commits!"
   echo ""

.husky/pre-push

@@ -1,6 +1,6 @@
 # Check code formatting
 echo "🔍 Checking code formatting..."
-npx nx format:check --verbose
+./node_modules/.bin/nx format:check --verbose
 
 echo "✅ Code formatting check passed"
 

packages/core/postgrest-js/src/PostgrestBuilder.ts

@@ -119,10 +119,27 @@ export default abstract class PostgrestBuilder<
     // NOTE: Invoke w/o `this` to avoid illegal invocation error.
     // https://github.com/supabase/postgrest-js/pull/247
     const _fetch = this.fetch
+
+    const headers: Record<string, string> = {}
+    this.headers.forEach((value, key) => {
+      headers[key] = value
+    })
+
+    let body
+    if (
+      (this.body === undefined || this.body === null) &&
+      this.method !== 'GET' &&
+      this.method !== 'HEAD'
+    ) {
+      body = '{}'
+    } else {
+      body = JSON.stringify(this.body)
+    }
+
     let res = _fetch(this.url.toString(), {
       method: this.method,
-      headers: this.headers,
-      body: JSON.stringify(this.body),
+      headers,
+      body,
       signal: this.signal,
     }).then(async (res) => {
       let error = null

packages/core/postgrest-js/test/headers_serialization.test.ts

@@ -0,0 +1,52 @@
+import { PostgrestClient } from '../src/index'
+
+const REST_URL = 'http://localhost:3000'
+
+test('fetch receives headers as plain object', async () => {
+  const mockFetch = jest.fn().mockResolvedValue({
+    ok: true,
+    status: 200,
+    statusText: 'OK',
+    text: async () => '{}',
+    headers: new Headers(),
+  })
+
+  const client = new PostgrestClient(REST_URL, {
+    fetch: mockFetch as any,
+    headers: { 'X-Custom-Header': 'CustomValue' },
+  })
+
+  await client.rpc('test_func')
+
+  expect(mockFetch).toHaveBeenCalledTimes(1)
+  const args = mockFetch.mock.calls[0]
+  const options = args[1]
+
+  // Verify headers is a plain object and contains expected values
+  expect(options.headers).not.toBeInstanceOf(Headers)
+  expect(Object.getPrototypeOf(options.headers)).toBe(Object.prototype)
+  expect(options.headers['x-custom-header']).toBe('CustomValue')
+  expect(options.headers['content-type']).toBe('application/json')
+})
+
+test('rpc without params sends empty json body', async () => {
+  const mockFetch = jest.fn().mockResolvedValue({
+    ok: true,
+    status: 200,
+    statusText: 'OK',
+    text: async () => '{}',
+    headers: new Headers(),
+  })
+
+  const client = new PostgrestClient(REST_URL, {
+    fetch: mockFetch as any,
+  })
+
+  await client.rpc('test_func')
+
+  expect(mockFetch).toHaveBeenCalledTimes(1)
+  const args = mockFetch.mock.calls[0]
+  const options = args[1]
+
+  expect(options.body).toBe('{}')
+})