fix: fix file number limit error (#17848)

api/models/model.py

@@ -23,6 +23,7 @@ from sqlalchemy import Float, Index, PrimaryKeyConstraint, func, text
 from sqlalchemy.orm import Mapped, Session, mapped_column
 
 from configs import dify_config
+from constants import DEFAULT_FILE_NUMBER_LIMITS
 from core.file import FILE_MODEL_IDENTITY, File, FileTransferMethod, FileType
 from core.file import helpers as file_helpers
 from core.file.tool_file_parser import ToolFileParser
@@ -442,7 +443,7 @@ class AppModelConfig(Base):
             else {
                 "image": {
                     "enabled": False,
-                    "number_limits": 3,
+                    "number_limits": DEFAULT_FILE_NUMBER_LIMITS,
                     "detail": "high",
                     "transfer_methods": ["remote_url", "local_file"],
                 }

api/models/workflow.py

@@ -15,7 +15,7 @@ from sqlalchemy import Index, PrimaryKeyConstraint, func
 from sqlalchemy.orm import Mapped, mapped_column
 
 import contexts
-from constants import HIDDEN_VALUE
+from constants import DEFAULT_FILE_NUMBER_LIMITS, HIDDEN_VALUE
 from core.helper import encrypter
 from core.variables import SecretVariable, Variable
 from factories import variable_factory
@@ -186,7 +186,7 @@ class Workflow(Base):
         features = json.loads(self._features)
         if features.get("file_upload", {}).get("image", {}).get("enabled", False):
             image_enabled = True
-            image_number_limits = int(features["file_upload"]["image"].get("number_limits", 1))
+            image_number_limits = int(features["file_upload"]["image"].get("number_limits", DEFAULT_FILE_NUMBER_LIMITS))
             image_transfer_methods = features["file_upload"]["image"].get(
                 "transfer_methods", ["remote_url", "local_file"]
             )