Make the optional AUTOMATIC1111 values nullable

This commit makes the optional AUTOMATIC1111 options default to None, and if the value is removed, it resets to None.

Signed-off-by: Balazs Toldi <balazs@toldi.eu>

backend/open_webui/apps/images/main.py

@@ -111,9 +111,9 @@ class OpenAIConfigForm(BaseModel):
 class Automatic1111ConfigForm(BaseModel):
     AUTOMATIC1111_BASE_URL: str
     AUTOMATIC1111_API_AUTH: str
-    AUTOMATIC1111_CFG_SCALE: float
-    AUTOMATIC1111_SAMPLER: str
-    AUTOMATIC1111_SCHEDULER: str
+    AUTOMATIC1111_CFG_SCALE: Optional[str]
+    AUTOMATIC1111_SAMPLER: Optional[str]
+    AUTOMATIC1111_SCHEDULER: Optional[str]
 
 
 class ComfyUIConfigForm(BaseModel):
@@ -144,12 +144,10 @@ async def update_config(form_data: ConfigForm, user=Depends(get_admin_user)):
     app.state.config.AUTOMATIC1111_API_AUTH = (
         form_data.automatic1111.AUTOMATIC1111_API_AUTH
     )
-    app.state.config.AUTOMATIC1111_CFG_SCALE = form_data.automatic1111.AUTOMATIC1111_CFG_SCALE
-    app.state.config.AUTOMATIC1111_SAMPLER = form_data.automatic1111.AUTOMATIC1111_SAMPLER
-    app.state.config.AUTOMATIC1111_SCHEDULER = (
-        form_data.automatic1111.AUTOMATIC1111_SCHEDULER
-    )
     
+    app.state.config.AUTOMATIC1111_CFG_SCALE = float(form_data.automatic1111.AUTOMATIC1111_CFG_SCALE) if form_data.automatic1111.AUTOMATIC1111_CFG_SCALE != "" else None
+    app.state.config.AUTOMATIC1111_SAMPLER = form_data.automatic1111.AUTOMATIC1111_SAMPLER if form_data.automatic1111.AUTOMATIC1111_SAMPLER != "" else None
+    app.state.config.AUTOMATIC1111_SCHEDULER = form_data.automatic1111.AUTOMATIC1111_SCHEDULER if form_data.automatic1111.AUTOMATIC1111_SCHEDULER != "" else None
 
     app.state.config.COMFYUI_BASE_URL = form_data.comfyui.COMFYUI_BASE_URL.strip("/")
     app.state.config.COMFYUI_WORKFLOW = form_data.comfyui.COMFYUI_WORKFLOW

backend/open_webui/config.py

@@ -1270,19 +1270,33 @@ AUTOMATIC1111_API_AUTH = PersistentConfig(
 AUTOMATIC1111_CFG_SCALE = PersistentConfig(
     "AUTOMATIC1111_CFG_SCALE",
     "image_generation.automatic1111.cfg_scale",
-    float(os.getenv("AUTOMATIC1111_CFG_SCALE", 7.0)),
+    (
+        float(os.environ.get("AUTOMATIC1111_CFG_SCALE"))
+        if os.environ.get("AUTOMATIC1111_CFG_SCALE")
+        else None
+    ),
 )
 
+
 AUTOMATIC1111_SAMPLER = PersistentConfig(
     "AUTOMATIC1111_SAMPLERE",
     "image_generation.automatic1111.sampler",
-    os.getenv("AUTOMATIC1111_SAMPLER", "Euler"),
+    (
+        os.environ.get("AUTOMATIC1111_SAMPLER")
+        if os.environ.get("AUTOMATIC1111_SAMPLER")
+        else None
+    )
+   
 )
 
 AUTOMATIC1111_SCHEDULER = PersistentConfig(
     "AUTOMATIC1111_SCHEDULER",
     "image_generation.automatic1111.scheduler",
-    os.getenv("AUTOMATIC1111_SCHEDULER", "Automatic"),
+    (
+        os.environ.get("AUTOMATIC1111_SCHEDULER")
+        if os.environ.get("AUTOMATIC1111_SCHEDULER")
+        else None
+    )
 )
 
 COMFYUI_BASE_URL = PersistentConfig(