关联关系

model/DanmakuClip.py

@@ -1,6 +1,9 @@
 import os
+from typing import TYPE_CHECKING
 
 from . import db
+if TYPE_CHECKING:
+    from .Workflow import Workflow
 
 
 class DanmakuClip(db.Model):
@@ -9,7 +12,7 @@ class DanmakuClip(db.Model):
     file = db.Column(db.String(255))
     offset = db.Column(db.Float, nullable=False, default=0)
     workflow_id = db.Column(db.Integer, db.ForeignKey('workflow.id'))
-    workflow = db.relationship("Workflow", backref=db.backref("danmaku_clips", lazy="dynamic"))
+    workflow: "Workflow" = db.relationship("Workflow", uselist=False, backref=db.backref("danmaku_clips"))
 
     @property
     def full_path(self):