✨ Add string trimming validator

Author: pcrespov

packages/models-library/src/models_library/utils/common_validators.py

@@ -1,4 +1,4 @@
-""" Reusable validators
+"""Reusable validators
 
     Example:
 
@@ -22,10 +22,19 @@ class MyModel(BaseModel):
 
 from common_library.json_serialization import json_loads
 from orjson import JSONDecodeError
-from pydantic import BaseModel
+from pydantic import BaseModel, BeforeValidator
 from pydantic.alias_generators import to_camel
 
 
+def trim_string_before(max_length: int) -> BeforeValidator:
+    def _trim(value: str):
+        if isinstance(value, str):
+            return value[:max_length]
+        return value
+
+    return BeforeValidator(_trim)
+
+
 def empty_str_to_none_pre_validator(value: Any):
     if isinstance(value, str) and value.strip() == "":
         return None

services/api-server/src/simcore_service_api_server/models/schemas/_base.py

@@ -3,6 +3,7 @@
 
 import packaging.version
 from models_library.utils.change_case import camel_to_snake
+from models_library.utils.common_validators import trim_string_before
 from pydantic import BaseModel, ConfigDict, Field, HttpUrl, StringConstraints
 
 from ...models._utils_pydantic import UriSchema
@@ -28,22 +29,31 @@ class ApiServerInputSchema(BaseModel):
 
 
 class BaseService(BaseModel):
-    id: Annotated[str, Field(..., description="Resource identifier")]
+    id: Annotated[
+        str,
+        Field(description="Resource identifier"),
+    ]
     version: Annotated[
-        VersionStr, Field(..., description="Semantic version number of the resource")
+        VersionStr,
+        Field(description="Semantic version number of the resource"),
     ]
     title: Annotated[
         str,
+        trim_string_before(max_length=100),
         StringConstraints(max_length=100),
-        Field(..., description="Human readable name"),
+        Field(description="Human readable name"),
     ]
     description: Annotated[
         str | None,
-        StringConstraints(max_length=500),
+        trim_string_before(max_length=1000),
+        StringConstraints(max_length=1000),
         Field(default=None, description="Description of the resource"),
     ]
+
     url: Annotated[
-        HttpUrl | None, UriSchema(), Field(..., description="Link to get this resource")
+        HttpUrl | None,
+        UriSchema(),
+        Field(description="Link to get this resource"),
     ]
 
     @property