Add support for namespaces

* Add namespaces support for existing endpoints and implement new ListNamespaces and RemoveNamespace methods.

* update documentations.

README.md

@@ -1,28 +1,42 @@
 # Upstash Vector Go Client
 
+[![Go Reference](https://pkg.go.dev/badge/github.com/upstash/vector-go.svg)](https://pkg.go.dev/github.com/upstash/vector-go)
+
 > [!NOTE]  
 > **This project is in GA Stage.**
 >
-> The Upstash Professional Support fully covers this project. It receives regular updates, and bug fixes. The Upstash team is committed to maintaining and improving its functionality.
+> The Upstash Professional Support fully covers this project. It receives regular updates, and bug fixes. 
+> The Upstash team is committed to maintaining and improving its functionality.
+
+[Upstash](https://upstash.com/) Vector is a serverless vector database designed for working with vector embeddings.
 
-This is the Go client for [Upstash](https://upstash.com/) Vector.
+This is the HTTP-based Go client for [Upstash](https://upstash.com/) Vector.
 
 ## Documentation
 
 - [**Reference Documentation**](https://upstash.com/docs/vector/overall/getstarted)
 
 ## Installation
 
+Use `go get` to install the Upstash Vector package:
 ```bash
 go get github.com/upstash/vector-go
 ```
 
+Import the Upstash Vector package in your project:
+
+```go
+import "github.com/upstash/vector-go"
+```
+
 ## Usage
 
+In order to use this client, head out to [Upstash Console](https://console.upstash.com) and create a vector database.
+
 ### Initializing the client
 
-There are two pieces of configuration required to use the Upstash Vector index client: an REST token and REST URL. 
-Find your configuration values in the console dashboard at [https://console.upstash.com/](https://console.upstash.com/).
+The REST token and REST URL configurations are required to initialize an Upstash Vector index client.
+Find your configuration values in the console dashboard at [Upstash Console](https://console.upstash.com/).
 
 ```go
 import (
@@ -80,14 +94,43 @@ func main() {
 
 Upstash vector indexes support operations for working with vector data using operations such as upsert, query, fetch, and delete.
 
+```go
+import (
+	"github.com/upstash/vector-go"
+)
+
+func main() {
+	index := vector.NewIndex("<UPSTASH_VECTOR_REST_URL>", "<UPSTASH_VECTOR_REST_TOKEN>")
+}
+```
+
+Upstash Vector allows you to partition a single index into multiple isolated namespaces.
+
+You can specify a namespace for an index client with `Namespace(ns string)` function.
+When you create a `Namespace` client, all index operations executed through this client become associated with the specified namespace.
+
+By default, the `Index` client is associated with the default namespace.
+
+```go
+import (
+	"github.com/upstash/vector-go"
+)
+
+func main() {
+	index := vector.NewIndex("<UPSTASH_VECTOR_REST_URL>", "<UPSTASH_VECTOR_REST_TOKEN>")
+
+	// Returns a new Namespace client associated with the given namespace
+	ns := index.Namespace("<NAMESPACE>")
+```
+
 ### Upserting Vectors
 
 All vectors upserted to index must have the same dimensions.
 
 Upsert can be used to insert new vectors into index or to update
 existing vectors.
 
-#### Upsert many
+#### Upsert Many
 
 ```go
 upserts := []vector.Upsert{
@@ -287,3 +330,23 @@ err := index.Reset()
 ```go
 info, err := index.Info()
 ```
+
+### List Namespaces
+
+All the names of active namespaces can be listed.
+
+```go
+namespaces, err := index.ListNamespaces()
+for _, ns : range namespaces {
+	fmt.Println(ns)
+}
+```
+
+### Delete Namespaces
+
+A namespace can be deleted entirely if it exists.
+The default namespaces cannot be deleted.
+
+```go
+err := index.Namespace("ns").DeleteNamespace()
+```

delete.go

@@ -2,11 +2,19 @@ package vector
 
 const deletePath = "/delete"
 
-// Delete deletes the vector with the given id and reports
-// whether the vector is deleted. If a vector with the given
-// id is not found, Delete returns false.
+// Delete deletes the vector with the given id in the default namespace and reports whether the vector is deleted.
+// If a vector with the given id is not found, Delete returns false.
 func (ix *Index) Delete(id string) (ok bool, err error) {
-	data, err := ix.sendBytes(deletePath, []byte(id))
+	return ix.deleteInternal(id, defaultNamespace)
+}
+
+// DeleteMany deletes the vectors with the given ids in the default namespace and reports how many of them are deleted.
+func (ix *Index) DeleteMany(ids []string) (count int, err error) {
+	return ix.deleteManyInternal(ids, defaultNamespace)
+}
+
+func (ix *Index) deleteInternal(id string, ns string) (ok bool, err error) {
+	data, err := ix.sendBytes(buildPath(deletePath, ns), []byte(id))
 	if err != nil {
 		return
 	}
@@ -16,10 +24,8 @@ func (ix *Index) Delete(id string) (ok bool, err error) {
 	return
 }
 
-// DeleteMany deletes the vectors with the given ids and reports
-// how many of them are deleted.
-func (ix *Index) DeleteMany(ids []string) (count int, err error) {
-	data, err := ix.sendJson(deletePath, ids)
+func (ix *Index) deleteManyInternal(ids []string, ns string) (count int, err error) {
+	data, err := ix.sendJson(buildPath(deletePath, ns), ids)
 	if err != nil {
 		return
 	}

delete_test.go

@@ -15,49 +15,56 @@ func randomString() string {
 }
 
 func TestDelete(t *testing.T) {
-	client, err := newTestClient()
-	require.NoError(t, err)
-
-	id := randomString()
-	err = client.Upsert(Upsert{
-		Id:     id,
-		Vector: []float32{0, 1},
-	})
-	require.NoError(t, err)
-
-	t.Run("existing id", func(t *testing.T) {
-		ok, err := client.Delete(id)
-		require.NoError(t, err)
-		require.True(t, ok)
-	})
-
-	t.Run("non existing id", func(t *testing.T) {
-		ok, err := client.Delete(randomString())
-		require.NoError(t, err)
-		require.False(t, ok)
-	})
+	for _, ns := range namespaces {
+		t.Run("namespace_"+ns, func(t *testing.T) {
+			client, err := newTestClientWithNamespace(ns)
+			require.NoError(t, err)
+			id := randomString()
+			err = client.Upsert(Upsert{
+				Id:     id,
+				Vector: []float32{0, 1},
+			})
+			require.NoError(t, err)
+
+			t.Run("existing id", func(t *testing.T) {
+				ok, err := client.Delete(id)
+				require.NoError(t, err)
+				require.True(t, ok)
+			})
+
+			t.Run("non existing id", func(t *testing.T) {
+				ok, err := client.Delete(randomString())
+				require.NoError(t, err)
+				require.False(t, ok)
+			})
+		})
+	}
 }
 
 func TestDeleteMany(t *testing.T) {
-	client, err := newTestClient()
-	require.NoError(t, err)
-
-	id0 := randomString()
-	id1 := randomString()
-	id2 := randomString()
-	err = client.UpsertMany([]Upsert{
-		{
-			Id:     id0,
-			Vector: []float32{0, 1},
-		},
-		{
-			Id:     id1,
-			Vector: []float32{5, 10},
-		},
-	})
-	require.NoError(t, err)
-
-	count, err := client.DeleteMany([]string{id0, id1, id2})
-	require.NoError(t, err)
-	require.Equal(t, 2, count)
+	for _, ns := range namespaces {
+		t.Run("namespace "+ns, func(t *testing.T) {
+			client, err := newTestClientWithNamespace(ns)
+			require.NoError(t, err)
+
+			id0 := randomString()
+			id1 := randomString()
+			id2 := randomString()
+			err = client.UpsertMany([]Upsert{
+				{
+					Id:     id0,
+					Vector: []float32{0, 1},
+				},
+				{
+					Id:     id1,
+					Vector: []float32{5, 10},
+				},
+			})
+			require.NoError(t, err)
+
+			count, err := client.DeleteMany([]string{id0, id1, id2})
+			require.NoError(t, err)
+			require.Equal(t, 2, count)
+		})
+	}
 }