Update deprecated pydantic validator (#1960)

update deprecated pydantic validator

src/backend/base/langflow/services/database/models/api_key/model.py

@@ -2,7 +2,7 @@ from datetime import datetime, timezone
 from typing import TYPE_CHECKING, Optional
 from uuid import UUID, uuid4
 
-from pydantic import field_validator, validator
+from pydantic import field_validator
 from sqlmodel import Column, DateTime, Field, Relationship, SQLModel, func
 
 if TYPE_CHECKING:
@@ -40,6 +40,7 @@ class ApiKeyCreate(ApiKeyBase):
     created_at: Optional[datetime] = Field(default_factory=utc_now)
 
     @field_validator("created_at", mode="before")
+    @classmethod
     def set_created_at(cls, v):
         return v or utc_now()
 
@@ -52,10 +53,11 @@ class UnmaskedApiKeyRead(ApiKeyBase):
 
 class ApiKeyRead(ApiKeyBase):
     id: UUID
-    api_key: str = Field()
+    api_key: str = Field(schema_extra={"validate_default": True})
     user_id: UUID = Field()
 
-    @validator("api_key", always=True)
+    @field_validator("api_key")
+    @classmethod
     def mask_api_key(cls, v):
         # This validator will always run, and will mask the API key
         return f"{v[:8]}{'*' * (len(v) - 8)}"

src/backend/base/langflow/services/settings/auth.py

@@ -4,7 +4,7 @@ from typing import Literal
 
 from loguru import logger
 from passlib.context import CryptContext
-from pydantic import Field, SecretStr, validator
+from pydantic import Field, SecretStr, field_validator
 from pydantic_settings import BaseSettings
 
 from langflow.services.settings.constants import DEFAULT_SUPERUSER, DEFAULT_SUPERUSER_PASSWORD
@@ -62,23 +62,25 @@ class AuthSettings(BaseSettings):
     # the default values
     # so we need to validate the superuser and superuser_password
     # fields
-    @validator("SUPERUSER", "SUPERUSER_PASSWORD", pre=True)
-    def validate_superuser(cls, value, values):
-        if values.get("AUTO_LOGIN"):
+    @field_validator("SUPERUSER", "SUPERUSER_PASSWORD", mode="before")
+    @classmethod
+    def validate_superuser(cls, value, info):
+        if info.data.get("AUTO_LOGIN"):
             if value != DEFAULT_SUPERUSER:
                 value = DEFAULT_SUPERUSER
                 logger.debug("Resetting superuser to default value")
-            if values.get("SUPERUSER_PASSWORD") != DEFAULT_SUPERUSER_PASSWORD:
-                values["SUPERUSER_PASSWORD"] = DEFAULT_SUPERUSER_PASSWORD
+            if info.data.get("SUPERUSER_PASSWORD") != DEFAULT_SUPERUSER_PASSWORD:
+                info.data["SUPERUSER_PASSWORD"] = DEFAULT_SUPERUSER_PASSWORD
                 logger.debug("Resetting superuser password to default value")
 
             return value
 
         return value
 
-    @validator("SECRET_KEY", pre=True)
-    def get_secret_key(cls, value, values):
-        config_dir = values.get("CONFIG_DIR")
+    @field_validator("SECRET_KEY", mode="before")
+    @classmethod
+    def get_secret_key(cls, value, info):
+        config_dir = info.data.get("CONFIG_DIR")
 
         if not config_dir:
             logger.debug("No CONFIG_DIR provided, not saving secret key")

src/backend/base/langflow/services/store/schema.py

@@ -1,7 +1,7 @@
 from typing import List, Optional
 from uuid import UUID
 
-from pydantic import BaseModel, validator
+from pydantic import BaseModel, field_validator
 
 
 class TagResponse(BaseModel):
@@ -37,7 +37,8 @@ class ListComponentResponse(BaseModel):
     private: Optional[bool] = None
 
     # tags comes as a TagsIdResponse but we want to return a list of TagResponse
-    @validator("tags", pre=True)
+    @field_validator("tags", mode="before")
+    @classmethod
     def tags_to_list(cls, v):
         # Check if all values are have id and name
         # if so, return v else transform to TagResponse