Bug fix to Metadata To Model & Metadata To SDXL Model for when no metadata found.

- Added `Metadata to Loras`, `Metadata To SDXL LoRAs`.
- Added unet, clip and vae outputs to `Metadata To Model` & `Metadata To SDXL Model`
- Added default vae as an input to `Metadata to VAE`

invokeai/app/invocations/adapters_linked.py

@@ -0,0 +1,131 @@
+from typing import Optional, Union
+
+from invokeai.app.invocations.baseinvocation import (
+    BaseInvocationOutput,
+    Input,
+    InputField,
+    InvocationContext,
+    OutputField,
+    invocation,
+    invocation_output,
+)
+from invokeai.app.invocations.controlnet_image_processors import ControlField, ControlNetInvocation
+from invokeai.app.invocations.ip_adapter import IPAdapterField, IPAdapterInvocation
+from invokeai.app.invocations.t2i_adapter import T2IAdapterField, T2IAdapterInvocation
+from invokeai.app.shared.fields import FieldDescriptions
+
+
+def append_list(new_item, items, item_cls):
+    """Add an item to an exiting item or list of items then output as a list of items."""
+
+    result = []
+    if items is None or (isinstance(items, list) and len(items) == 0):
+        pass
+    elif isinstance(items, item_cls):
+        result.append(items)
+    elif isinstance(items, list) and all(isinstance(i, item_cls) for i in items):
+        result.extend(items)
+    else:
+        raise ValueError(f"Invalid adapter list format: {items}")
+
+    result.append(new_item)
+    return result
+
+
+@invocation_output("control_list_output")
+class ControlListOutput(BaseInvocationOutput):
+    # Outputs
+    control_list: list[ControlField] = OutputField(description=FieldDescriptions.control)
+
+
+@invocation(
+    "controlnet-linked",
+    title="ControlNet-Linked",
+    tags=["controlnet"],
+    category="controlnet",
+    version="1.1.0",
+)
+class ControlNetLinkedInvocation(ControlNetInvocation):
+    """Collects ControlNet info to pass to other nodes."""
+
+    control_list: Optional[Union[ControlField, list[ControlField]]] = InputField(
+        default=None,
+        title="ControlNet-List",
+        input=Input.Connection,
+        ui_order=0,
+    )
+
+    def invoke(self, context: InvocationContext) -> ControlListOutput:
+        # Call parent
+        output = super().invoke(context).control
+        # Append the control output to the input list
+        control_list = append_list(output, self.control_list, ControlField)
+        return ControlListOutput(control_list=control_list)
+
+
+@invocation_output("ip_adapter_list_output")
+class IPAdapterListOutput(BaseInvocationOutput):
+    # Outputs
+    ip_adapter_list: list[IPAdapterField] = OutputField(
+        description=FieldDescriptions.ip_adapter, title="IP-Adapter-List"
+    )
+
+
+@invocation(
+    "ip_adapter_linked",
+    title="IP-Adapter-Linked",
+    tags=["ip_adapter", "control"],
+    category="ip_adapter",
+    version="1.1.0",
+)
+class IPAdapterLinkedInvocation(IPAdapterInvocation):
+    """Collects IP-Adapter info to pass to other nodes."""
+
+    ip_adapter_list: Optional[Union[IPAdapterField, list[IPAdapterField]]] = InputField(
+        description=FieldDescriptions.ip_adapter,
+        title="IP-Adapter-List",
+        default=None,
+        input=Input.Connection,
+        ui_order=0,
+    )
+
+    def invoke(self, context: InvocationContext) -> IPAdapterListOutput:
+        # Call parent
+        output = super().invoke(context).ip_adapter
+        # Append the control output to the input list
+        result = append_list(output, self.ip_adapter_list, IPAdapterField)
+        return IPAdapterListOutput(ip_adapter_list=result)
+
+
+@invocation_output("ip_adapters_output")
+class T2IAdapterListOutput(BaseInvocationOutput):
+    # Outputs
+    t2i_adapter_list: list[T2IAdapterField] = OutputField(
+        description=FieldDescriptions.t2i_adapter, title="T2I Adapter-List"
+    )
+
+
+@invocation(
+    "t2i_adapter_linked",
+    title="T2I-Adapter-Linked",
+    tags=["t2i_adapter", "control"],
+    category="t2i_adapter",
+    version="1.0.0",
+)
+class T2IAdapterLinkedInvocation(T2IAdapterInvocation):
+    """Collects T2I-Adapter info to pass to other nodes."""
+
+    t2i_adapter_list: Optional[Union[T2IAdapterField, list[T2IAdapterField]]] = InputField(
+        description=FieldDescriptions.ip_adapter,
+        title="T2I-Adapter",
+        default=None,
+        input=Input.Connection,
+        ui_order=0,
+    )
+
+    def invoke(self, context: InvocationContext) -> T2IAdapterListOutput:
+        # Call parent
+        output = super().invoke(context).t2i_adapter
+        # Append the control output to the input list
+        t2i_adapter_list = append_list(output, self.t2i_adapter_list, T2IAdapterField)
+        return T2IAdapterListOutput(t2i_adapter_list=t2i_adapter_list)