finsh async image generation

api/controllers/service_api_with_auth/app/image.py

@@ -1,5 +1,3 @@
-from datetime import datetime, timedelta
-
 from configs import dify_config
 from controllers.service_api_with_auth import api
 from controllers.service_api_with_auth.app.error import NotChatAppError, NotEnoughMessageCountError
@@ -48,7 +46,7 @@ class ImageGenerateApi(Resource):
                   example: success
                 image_id:
                   type: string
-                  description: ID of the generated image, futher to fetch the image details and status
+                  description: ID of the generated image (initially in pending state)
                   example: 123e4567-e89b-12d3-a456-426614174000
                 message:
                   type: string
@@ -75,15 +73,20 @@ class ImageGenerateApi(Resource):
             raise NotEnoughMessageCountError()
 
         try:
-            # Use the service to generate the image
+            # Create a pending image entity and start the generation task
             image_id = ImageGenerationService.generate_image(
                 end_user=end_user,
                 content_type=content_type,
             )
 
-            return {"result": "success", "message": "Image generated successfully.", "image_id": image_id}
+            # Return the image ID for status checking
-        except Exception:
+            return {
-            raise InternalServerError("Failed to generate image")
+                "result": "success",
+                "message": "Image generation started. Check status with the image ID.",
+                "image_id": image_id,
+            }
+        except Exception as e:
+            raise InternalServerError(f"Failed to generate image: {e}")
 
 
 class ImageListApi(Resource):

api/fields/end_user_fields.py

@@ -34,6 +34,7 @@ end_user_image_fields = {
     "image_url": fields.String,
     "content_type": fields.String,
     "text_content": fields.String,
+    "error_message": fields.String,
     "created_at": TimestampField,
 }
 

api/migrations/versions/2025_03_31_2112-329938947502_update_image_table.py

@@ -0,0 +1,39 @@
+"""update image table
+
+Revision ID: 329938947502
+Revises: a215b993fa58
+Create Date: 2025-03-31 21:12:55.412130
+
+"""
+from alembic import op
+import models as models
+import sqlalchemy as sa
+
+
+# revision identifiers, used by Alembic.
+revision = '329938947502'
+down_revision = 'a215b993fa58'
+branch_labels = None
+depends_on = None
+
+
+def upgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    with op.batch_alter_table('user_generated_images', schema=None) as batch_op:
+        batch_op.add_column(sa.Column('error_message', sa.Text(), nullable=True))
+        batch_op.alter_column('workflow_run_id',
+               existing_type=sa.UUID(),
+               nullable=True)
+
+    # ### end Alembic commands ###
+
+
+def downgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    with op.batch_alter_table('user_generated_images', schema=None) as batch_op:
+        batch_op.alter_column('workflow_run_id',
+               existing_type=sa.UUID(),
+               nullable=False)
+        batch_op.drop_column('error_message')
+
+    # ### end Alembic commands ###

api/migrations/versions/2025_03_31_2115-382f0cad6652_update_status.py

@@ -0,0 +1,33 @@
+"""update status
+
+Revision ID: 382f0cad6652
+Revises: 329938947502
+Create Date: 2025-03-31 21:15:32.929703
+
+"""
+from alembic import op
+import models as models
+import sqlalchemy as sa
+
+
+# revision identifiers, used by Alembic.
+revision = '382f0cad6652'
+down_revision = '329938947502'
+branch_labels = None
+depends_on = None
+
+
+def upgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    with op.batch_alter_table('user_generated_images', schema=None) as batch_op:
+        batch_op.add_column(sa.Column('status', sa.String(length=20), server_default='pending', nullable=False))
+
+    # ### end Alembic commands ###
+
+
+def downgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    with op.batch_alter_table('user_generated_images', schema=None) as batch_op:
+        batch_op.drop_column('status')
+
+    # ### end Alembic commands ###

api/models/model.py

@@ -1866,11 +1866,15 @@ class UserGeneratedImage(db.Model):  # type: ignore[name-defined]
     id = db.Column(StringUUID, server_default=db.text("uuid_generate_v4()"))
     app_id = db.Column(StringUUID, nullable=False)
     end_user_id = db.Column(StringUUID, nullable=False)
-    workflow_run_id = db.Column(StringUUID, nullable=False)  # related generation id
+    workflow_run_id = db.Column(StringUUID, nullable=True)  # related generation id (nullable for pending status)
     content_type = db.Column(db.String(255), nullable=False)  # 'self_message' or 'summary_advice'
     image_url = db.Column(db.Text, nullable=True)
     text_content = db.Column(db.Text, nullable=True)
     raw_content = db.Column(db.JSON, nullable=True)  # save raw llm outputs
+    status = db.Column(
+        db.String(20), nullable=False, server_default="pending"
+    )  # pending, processing, completed, failed
+    error_message = db.Column(db.Text, nullable=True)
     created_at = db.Column(db.DateTime, nullable=False, server_default=db.func.current_timestamp())
     updated_at = db.Column(
         db.DateTime, nullable=False, server_default=db.func.current_timestamp(), onupdate=db.func.current_timestamp()
@@ -1879,23 +1883,3 @@ class UserGeneratedImage(db.Model):  # type: ignore[name-defined]
     @property
     def end_user(self):
         return db.session.query(EndUser).filter(EndUser.id == self.end_user_id).first()
-
-    @property
-    def status(self):
-        workflow_run = db.session.query(WorkflowRun).filter(WorkflowRun.id == self.workflow_run_id).first()
-
-        if workflow_run is None:
-            return WorkflowRunStatus.FAILED.value
-
-        return workflow_run.status
-
-    def refresh_status(self):
-        workflow_run = db.session.query(WorkflowRun).filter(WorkflowRun.id == self.workflow_run_id).first()
-
-        if workflow_run is None:
-            return
-
-        if workflow_run.status == WorkflowRunStatus.SUCCEEDED and self.image_url is None:
-            self.image_url = workflow_run.outputs.get("image_url")
-            self.text_content = workflow_run.outputs.get("text_content")
-            db.session.commit()

api/services/image_generation_service.py

@@ -8,6 +8,7 @@ from libs.helper import RateLimiter
 from libs.infinite_scroll_pagination import MultiPagePagination
 from models.model import App, EndUser, Message, UserGeneratedImage
 from services.app_generate_service import AppGenerateService
+from tasks.image_generation_task import generate_image_task
 
 
 # define string enum for content_type
@@ -24,83 +25,39 @@ class ImageGenerationService:
 
     @staticmethod
     def generate_image(end_user: EndUser, content_type: ContentType) -> str:
+        """
+        Initiates asynchronous image generation process and creates a pending image record
 
+        Args:
+            end_user: End user object
+            content_type: Type of content to generate
+
+        Returns:
+            The ID of the created UserGeneratedImage entity that will be updated by the task
+        """
+        # Check if rate limited before submitting task
         if ImageGenerationService.generate_image_rate_limiter.is_rate_limited(end_user.id):
             raise Exception("Image generation rate limit exceeded")
 
-        if dify_config.IMAGE_GENERATION_APP_ID is None:
+        # Create a pending UserGeneratedImage entity
-            raise Exception("Image generation app id is not set")
-
-        image_generation_app_model = App.query.filter(App.id == dify_config.IMAGE_GENERATION_APP_ID).first()
-        if image_generation_app_model is None:
-            raise Exception("Image generation app model is not found")
-
-        user_profile = end_user.extra_profile
-        recent_messages = (
-            db.session.query(Message)
-            .filter(Message.app_id == end_user.app_id, Message.from_end_user_id == end_user.id)
-            .order_by(Message.created_at.desc())
-            .limit(10)
-            .all()
-        )
-
-        recent_messages = [f"user: {message.query}\n\nassistant: {message.answer}" for message in recent_messages]
-
-        args = {
-            "inputs": {
-                "user_profile": json.dumps(user_profile),
-                "recent_messages": "\n\n".join(recent_messages),
-                "image_type": content_type,
-            }
-        }
-
-        try:
-            response = AppGenerateService.generate(
-                app_model=image_generation_app_model,
-                user=end_user,
-                args=args,
-                invoke_from=InvokeFrom.SCHEDULER,
-                streaming=False,
-            )
-
-            if not isinstance(response, dict):
-                raise Exception("Failed to generate image")
-
-            # load workflow id and save it to db for futher fetch image status
-            workflow_run_id = response.get("workflow_run_id")
-
-            raw_content = response.get("data", {}).get("outputs", {})
-
-            # parse url from response.data.outputs
-            image_objs = raw_content.get("files")
-            url = None
-            for image_obj in image_objs:
-                if image_obj.get("type") == "image":
-                    url = image_obj.get("url")
-                    break
-
-            if url is None:
-                raise Exception("Failed to generate image")
-
-            text_content = raw_content.get("text")
-
         user_generated_image = UserGeneratedImage(
             app_id=end_user.app_id,
             end_user_id=end_user.id,
-                workflow_run_id=workflow_run_id,
             content_type=content_type,
-                image_url=url,
+            status="pending",  # Set initial status to pending
-                text_content=text_content,
-                raw_content=raw_content,
         )
 
         db.session.add(user_generated_image)
         db.session.commit()
 
-            return user_generated_image.id
+        # Get the generated ID for tracking
+        image_id = str(user_generated_image.id)
+
+        # Submit the task asynchronously with the image_id
+        generate_image_task.delay(end_user_id=str(end_user.id), content_type=content_type, image_id=image_id)
 
-        except Exception as e:
+        # Return the image ID as a reference for status checking
-            raise Exception(f"Failed to generate image: {e}")
+        return image_id
 
     @staticmethod
     def pagination_image_list(end_user: EndUser, limit: int, offset: int) -> MultiPagePagination:

api/tasks/image_generation_task.py

@@ -0,0 +1,152 @@
+import json
+import logging
+import time
+
+import click
+from celery import shared_task  # type: ignore
+from configs import dify_config
+from core.app.entities.app_invoke_entities import InvokeFrom
+from extensions.ext_database import db
+from models.model import App, EndUser, Message, UserGeneratedImage
+from services.app_generate_service import AppGenerateService
+
+
+@shared_task(queue="generation")
+def generate_image_task(
+    end_user_id: str,
+    content_type: str,
+    image_id: str,
+) -> str:
+    """
+    Asynchronously generate an image based on the end user's conversation data and update the existing UserGeneratedImage record
+
+    Args:
+        end_user_id: End user ID
+        content_type: Type of content to generate (self_message or summary_advice)
+        app_id: The app ID of the end user
+        image_id: ID of the existing pending UserGeneratedImage entity to update
+
+    Returns:
+        The ID of the updated image record
+
+    Usage: generate_image_task.delay(end_user_id, content_type, app_id, image_id)
+    """
+    logging.info(click.style(f"Starting image generation for user {end_user_id}, image_id: {image_id}", fg="green"))
+    start_at = time.perf_counter()
+
+    try:
+        # Retrieve models for processing
+        end_user = db.session.query(EndUser).filter(EndUser.id == end_user_id).first()
+        if not end_user:
+            raise Exception(f"End user {end_user_id} not found")
+
+        # Get the existing UserGeneratedImage entity
+        user_generated_image = db.session.query(UserGeneratedImage).filter(UserGeneratedImage.id == image_id).first()
+        if not user_generated_image:
+            raise Exception(f"UserGeneratedImage {image_id} not found")
+
+        # Update status to processing
+        user_generated_image.status = "processing"
+        db.session.commit()
+
+        # Get image generation app
+        if dify_config.IMAGE_GENERATION_APP_ID is None:
+            user_generated_image.status = "failed"
+            user_generated_image.error_message = "Image generation app id is not set"
+            db.session.commit()
+            raise Exception("Image generation app id is not set")
+
+        image_generation_app_model = App.query.filter(App.id == dify_config.IMAGE_GENERATION_APP_ID).first()
+        if image_generation_app_model is None:
+            user_generated_image.status = "failed"
+            user_generated_image.error_message = "Image generation app model is not found"
+            db.session.commit()
+            raise Exception("Image generation app model is not found")
+
+        # Get user profile and recent messages
+        user_profile = end_user.extra_profile
+        recent_messages = (
+            db.session.query(Message)
+            .filter(Message.app_id == end_user.app_id, Message.from_end_user_id == end_user.id)
+            .order_by(Message.created_at.desc())
+            .limit(10)
+            .all()
+        )
+
+        recent_messages = [f"user: {message.query}\n\nassistant: {message.answer}" for message in recent_messages]
+
+        # Prepare arguments for generation
+        args = {
+            "inputs": {
+                "user_profile": json.dumps(user_profile),
+                "recent_messages": "\n\n".join(recent_messages),
+                "image_type": content_type,
+            }
+        }
+
+        # Generate image through app service
+        response = AppGenerateService.generate(
+            app_model=image_generation_app_model,
+            user=end_user,
+            args=args,
+            invoke_from=InvokeFrom.SCHEDULER,
+            streaming=False,
+        )
+
+        if not isinstance(response, dict):
+            user_generated_image.status = "failed"
+            user_generated_image.error_message = "Failed to generate image"
+            db.session.commit()
+            raise Exception("Failed to generate image")
+
+        # Extract workflow run ID and content
+        workflow_run_id = response.get("workflow_run_id")
+        raw_content = response.get("data", {}).get("outputs", {})
+
+        # Parse URL from response
+        image_objs = raw_content.get("files")
+        url = None
+        for image_obj in image_objs:
+            if image_obj.get("type") == "image":
+                url = image_obj.get("url")
+                break
+
+        if url is None:
+            user_generated_image.status = "failed"
+            user_generated_image.error_message = "No image URL found in response"
+            db.session.commit()
+            raise Exception("Failed to generate image")
+
+        text_content = raw_content.get("text")
+
+        # Update the existing UserGeneratedImage with the generated content
+        user_generated_image.workflow_run_id = workflow_run_id
+        user_generated_image.image_url = url
+        user_generated_image.text_content = text_content
+        user_generated_image.raw_content = raw_content
+        user_generated_image.status = "completed"
+        db.session.commit()
+
+        end_at = time.perf_counter()
+        logging.info(
+            click.style(
+                f"Image generation completed for user {end_user_id}. Image ID: {image_id}. Latency: {end_at - start_at}",
+                fg="green",
+            )
+        )
+
+        return image_id
+    except Exception as e:
+        logging.exception(f"Failed to generate image: {str(e)}")
+        # Update status to failed if we have the entity
+        try:
+            user_generated_image = (
+                db.session.query(UserGeneratedImage).filter(UserGeneratedImage.id == image_id).first()
+            )
+            if user_generated_image:
+                user_generated_image.status = "failed"
+                user_generated_image.error_message = str(e)
+                db.session.commit()
+        except Exception:
+            logging.exception(f"Failed to update image status for {image_id}")
+        raise