feat: Add multi2multivec-weaviate vectorizer support (#199)

src/Weaviate.Client.Tests/Unit/TestVectorizers.cs

@@ -197,4 +197,38 @@ public void Test_NamedVectorConfig_Has_Properties()
         // Assert
         Assert.Contains("\"properties\":[\"name\"]", json);
     }
+
+    /// <summary>
+    /// Tests that Multi2MultiVecWeaviate serializes imageFields correctly
+    /// </summary>
+    [Fact]
+    [System.Diagnostics.CodeAnalysis.SuppressMessage(
+        "Performance",
+        "CA1869:Cache and reuse 'JsonSerializerOptions' instances",
+        Justification = "<Pending>"
+    )]
+    public void Test_Multi2MultiVecWeaviate_Serializes_ImageFields()
+    {
+        // Arrange
+        var vc = Configure.MultiVector(
+            "default",
+            v => v.Multi2MultiVecWeaviate(imageFields: new[] { "image" }, model: "my-model")
+        );
+
+        // Act
+        var dto = vc.Vectorizer?.ToDto() ?? default;
+        var json = JsonSerializer.Serialize(
+            dto,
+            new JsonSerializerOptions
+            {
+                PropertyNamingPolicy = JsonNamingPolicy.CamelCase,
+                WriteIndented = false,
+            }
+        );
+
+        // Assert
+        Assert.Contains("\"imageFields\"", json);
+        Assert.Contains("\"image\"", json);
+        Assert.Contains("\"my-model\"", json);
+    }
 }

src/Weaviate.Client/Configure/VectorizerFactoryMulti.cs

@@ -95,5 +95,24 @@ public VectorizerConfig Multi2MultiVecJinaAI(
             VectorizeCollectionName = vectorizeCollectionName,
             Weights = VectorizerWeights.FromWeightedFields(imageFields, textFields),
         };
+
+    /// <summary>
+    /// Creates a multi2multivec-weaviate vectorizer configuration
+    /// </summary>
+    /// <param name="imageFields">The image fields to vectorize</param>
+    /// <param name="baseURL">The base url</param>
+    /// <param name="model">The model</param>
+    /// <returns>The vectorizer config</returns>
+    public VectorizerConfig Multi2MultiVecWeaviate(
+        string[]? imageFields = null,
+        string? baseURL = null,
+        string? model = null
+    ) =>
+        new Multi2MultiVecWeaviate
+        {
+            BaseURL = baseURL,
+            Model = model,
+            ImageFields = imageFields,
+        };
 #pragma warning restore CA1822 // Mark members as static
 }

src/Weaviate.Client/Models/Vectorizer.cs

@@ -499,6 +499,36 @@ internal Multi2MultiVecJinaAI() { }
         public bool? VectorizeCollectionName { get; set; } = null;
     }
 
+    /// <summary>
+    /// The configuration for multi-media multi-vector vectorization using the Weaviate module.
+    /// Accepts only image fields. See the documentation for detailed usage.
+    /// </summary>
+    [Vectorizer("multi2multivec-weaviate", VectorType.MultiVector)]
+    public record Multi2MultiVecWeaviate : VectorizerConfig
+    {
+        /// <summary>
+        /// Initializes a new instance of the <see cref="Multi2MultiVecWeaviate"/> class
+        /// </summary>
+        [JsonConstructor]
+        internal Multi2MultiVecWeaviate() { }
+
+        /// <summary>
+        /// Gets or sets the value of the base url
+        /// </summary>
+        [JsonPropertyName("baseUrl")]
+        public string? BaseURL { get; set; } = null;
+
+        /// <summary>
+        /// Gets or sets the value of the model
+        /// </summary>
+        public string? Model { get; set; } = null;
+
+        /// <summary>
+        /// Gets or sets the image fields for vectorization
+        /// </summary>
+        public string[]? ImageFields { get; set; } = null;
+    }
+
     /// <summary>
     /// The configuration for multi-media vectorization using the VoyageAI module.
     /// See the documentation for detailed usage.

src/Weaviate.Client/PublicAPI.Unshipped.txt

@@ -6595,6 +6595,25 @@ Weaviate.Client.WeaviateUnprocessableEntityException.WeaviateUnprocessableEntity
 ~Weaviate.Client.Models.Typed.WeaviateGroup<T, TObject>.WeaviateGroup(Weaviate.Client.Models.Typed.WeaviateGroup<T, TObject>! original) -> void
 ~Weaviate.Client.Models.Typed.WeaviateGroup<T>.WeaviateGroup(Weaviate.Client.Models.Typed.WeaviateGroup<T>! original) -> void
 ~Weaviate.Client.Models.Typed.WeaviateObject<T>.WeaviateObject(Weaviate.Client.Models.Typed.WeaviateObject<T>! original) -> void
+override sealed Weaviate.Client.Models.Vectorizer.Multi2MultiVecWeaviate.Equals(Weaviate.Client.Models.VectorizerConfig? other) -> bool
+override Weaviate.Client.Models.Vectorizer.Multi2MultiVecWeaviate.<Clone>$() -> Weaviate.Client.Models.Vectorizer.Multi2MultiVecWeaviate!
+override Weaviate.Client.Models.Vectorizer.Multi2MultiVecWeaviate.EqualityContract.get -> System.Type!
+override Weaviate.Client.Models.Vectorizer.Multi2MultiVecWeaviate.Equals(object? obj) -> bool
+override Weaviate.Client.Models.Vectorizer.Multi2MultiVecWeaviate.GetHashCode() -> int
+override Weaviate.Client.Models.Vectorizer.Multi2MultiVecWeaviate.PrintMembers(System.Text.StringBuilder! builder) -> bool
+override Weaviate.Client.Models.Vectorizer.Multi2MultiVecWeaviate.ToString() -> string!
+static Weaviate.Client.Models.Vectorizer.Multi2MultiVecWeaviate.operator !=(Weaviate.Client.Models.Vectorizer.Multi2MultiVecWeaviate? left, Weaviate.Client.Models.Vectorizer.Multi2MultiVecWeaviate? right) -> bool
+static Weaviate.Client.Models.Vectorizer.Multi2MultiVecWeaviate.operator ==(Weaviate.Client.Models.Vectorizer.Multi2MultiVecWeaviate? left, Weaviate.Client.Models.Vectorizer.Multi2MultiVecWeaviate? right) -> bool
+virtual Weaviate.Client.Models.Vectorizer.Multi2MultiVecWeaviate.Equals(Weaviate.Client.Models.Vectorizer.Multi2MultiVecWeaviate? other) -> bool
+Weaviate.Client.Models.Vectorizer.Multi2MultiVecWeaviate
+Weaviate.Client.Models.Vectorizer.Multi2MultiVecWeaviate.BaseURL.get -> string?
+Weaviate.Client.Models.Vectorizer.Multi2MultiVecWeaviate.BaseURL.set -> void
+Weaviate.Client.Models.Vectorizer.Multi2MultiVecWeaviate.ImageFields.get -> string![]?
+Weaviate.Client.Models.Vectorizer.Multi2MultiVecWeaviate.ImageFields.set -> void
+Weaviate.Client.Models.Vectorizer.Multi2MultiVecWeaviate.Model.get -> string?
+Weaviate.Client.Models.Vectorizer.Multi2MultiVecWeaviate.Model.set -> void
+Weaviate.Client.Models.Vectorizer.Multi2MultiVecWeaviate.Multi2MultiVecWeaviate(Weaviate.Client.Models.Vectorizer.Multi2MultiVecWeaviate! original) -> void
+Weaviate.Client.VectorizerFactoryMulti.Multi2MultiVecWeaviate(string![]? imageFields = null, string? baseURL = null, string? model = null) -> Weaviate.Client.Models.VectorizerConfig!
 Weaviate.Client.RequiresWeaviateVersionAttribute
 Weaviate.Client.RequiresWeaviateVersionAttribute.MinimumVersion.get -> System.Version!
 Weaviate.Client.RequiresWeaviateVersionAttribute.RequiresWeaviateVersionAttribute(int major, int minor, int patch = 0) -> void