chore: make comfy workflow can generate image with a random seed (#10462)

api/core/tools/provider/builtin/comfyui/tools/comfyui_client.py

@@ -48,7 +48,6 @@ class ComfyUiClient:
         prompt = origin_prompt.copy()
         id_to_class_type = {id: details["class_type"] for id, details in prompt.items()}
         k_sampler = [key for key, value in id_to_class_type.items() if value == "KSampler"][0]
-        prompt.get(k_sampler)["inputs"]["seed"] = random.randint(10**14, 10**15 - 1)
         positive_input_id = prompt.get(k_sampler)["inputs"]["positive"][0]
         prompt.get(positive_input_id)["inputs"]["text"] = positive_prompt
 
@@ -72,6 +71,18 @@ class ComfyUiClient:
             prompt.get(load_image)["inputs"]["image"] = image_name
         return prompt
 
+    def set_prompt_seed_by_id(self, origin_prompt: dict, seed_id: str) -> dict:
+        prompt = origin_prompt.copy()
+        if seed_id not in prompt:
+            raise Exception("Not a valid seed node")
+        if "seed" in prompt[seed_id]["inputs"]:
+            prompt[seed_id]["inputs"]["seed"] = random.randint(10**14, 10**15 - 1)
+        elif "noise_seed" in prompt[seed_id]["inputs"]:
+            prompt[seed_id]["inputs"]["noise_seed"] = random.randint(10**14, 10**15 - 1)
+        else:
+            raise Exception("Not a valid seed node")
+        return prompt
+
     def track_progress(self, prompt: dict, ws: WebSocket, prompt_id: str):
         node_ids = list(prompt.keys())
         finished_nodes = []

api/core/tools/provider/builtin/comfyui/tools/comfyui_workflow.py

@@ -70,6 +70,9 @@ class ComfyUIWorkflowTool(BuiltinTool):
             else:
                 prompt = comfyui.set_prompt_images_by_default(prompt, image_names)
 
+        if seed_id := tool_parameters.get("seed_id"):
+            prompt = comfyui.set_prompt_seed_by_id(prompt, seed_id)
+
         images = comfyui.generate_image_by_prompt(prompt)
         result = []
         for img in images:

api/core/tools/provider/builtin/comfyui/tools/comfyui_workflow.yaml

@@ -52,3 +52,12 @@ parameters:
       en_US: When the workflow has multiple image nodes, enter the ID list of these nodes, and the images will be passed to ComfyUI in the order of the list.
       zh_Hans: 当工作流有多个图片节点时，输入这些节点的ID列表，图片将按列表顺序传给ComfyUI
     form: form
+  - name: seed_id
+    type: string
+    label:
+      en_US: Seed Node Id
+      zh_Hans: 种子节点ID
+    human_description:
+      en_US: If you need to generate different images each time, you need to enter the ID of the seed node.
+      zh_Hans: 如果需要每次生成时使用不同的种子，需要输入包含种子的节点的ID
+    form: form