Add Rest() and RestError() methods - Fixes #29

README.md

@@ -71,6 +71,18 @@ client, err := supabase.NewClient(url, key, options)
 
 For more see [postgrest-go Query Builder documentation](https://pkg.go.dev/github.com/supabase-community/postgrest-go#QueryBuilder)
 
+### Accessing the PostgREST Client
+
+```go
+restClient := client.Rest()
+restClient.ChangeSchema("custom_schema")
+
+// Access PostgREST client errors
+if err := client.RestError(); err != nil {
+    log.Printf("PostgREST error: %v", err)
+}
+```
+
 ### Authentication
 
 The client provides comprehensive authentication features through the integrated GoTrue client.

client.go

@@ -80,6 +80,20 @@ func NewClient(url, key string, options *ClientOptions) (*Client, error) {
 	return client, nil
 }
 
+// Returns the underlying PostgREST client used by this Supabase Client
+func (c *Client) Rest() *postgrest.Client {
+	return c.rest
+}
+
+// Returns last recorded error by the underlying PostgREST client
+// Returns nil if the REST client is uninitialized or no error has occurred
+func (c *Client) RestError() error {
+	if c.rest == nil {
+		return nil
+	}
+	return c.rest.ClientError
+}
+
 // Wrap postgrest From method
 // From returns a QueryBuilder for the specified table.
 func (c *Client) From(table string) *postgrest.QueryBuilder {

client_test.go

@@ -63,3 +63,31 @@ func TestFunctions(t *testing.T) {
 	}
 	t.Logf("function invokation result: %v", result)
 }
+
+func TestRest(t *testing.T) {
+	client, err := supabase.NewClient(API_URL, API_KEY, nil)
+	if err != nil {
+		t.Errorf("cannot initialize client: %v", err)
+	}
+
+	restClient := client.Rest()
+	if restClient == nil {
+		t.Error("Rest() returned nil, expected non-nil postgrest.Client")
+	}
+	t.Logf("Rest() returned: %v", restClient)
+}
+
+func TestRestError(t *testing.T) {
+	client, err := supabase.NewClient(API_URL, API_KEY, nil)
+	if err != nil {
+		t.Errorf("cannot initialize client: %v", err)
+	}
+
+	// Test that RestError returns nil when no error has occurred
+	restErr := client.RestError()
+	if restErr != nil {
+		t.Errorf("RestError() returned error when none expected: %v", restErr)
+	}
+
+	t.Logf("RestError() returned: %v", restErr)
+}