Update models/text_to_image.py

models/text_to_image.py

@@ -4,7 +4,7 @@ from typing import List, Optional
 
 class TextToImageRequest(BaseModel):
     prompt: str = Field(..., description="The prompt to generate an image from.")
-    negative_prompt: Optional[List[str]] = Field(None, description="One or several prompts to guide what NOT to include in image generation.")
+    negative_prompt: Optional[str] = Field(None, description="One or several prompts to guide what NOT to include in image generation.")
     height: Optional[int] = Field(None, description="The height in pixels of the image to generate.", ge=64, le=2048)
     width: Optional[int] = Field(None, description="The width in pixels of the image to generate.", ge=64, le=2048)
     num_inference_steps: Optional[int] = Field(None, description="The number of denoising steps. More denoising steps usually lead to a higher quality image at the expense of slower inference.", ge=1, le=500)