Address PR review: Add constants, IPv4 validation, error handling, and expanded tests

Co-Authored-By: Joe Moura <joao@crewai.com>

src/crewai/agent.py

@@ -142,8 +142,13 @@ class Agent(BaseAgent):
                 self.embedder = crew_embedder
 
             if self.knowledge_sources:
-                from crewai.utilities import sanitize_collection_name
-                knowledge_agent_name = sanitize_collection_name(self.role)
+                try:
+                    from crewai.utilities import sanitize_collection_name
+                    knowledge_agent_name = sanitize_collection_name(self.role)
+                except Exception as e:
+                    self._logger.warning(f"Error sanitizing collection name: {e}")
+                    knowledge_agent_name = "default_agent"
+                    
                 if isinstance(self.knowledge_sources, list) and all(
                     isinstance(k, BaseKnowledgeSource) for k in self.knowledge_sources
                 ):

src/crewai/utilities/__init__.py

@@ -7,7 +7,7 @@ from .parser import YamlParser
 from .printer import Printer
 from .prompts import Prompts
 from .rpm_controller import RPMController
-from .string_utils import sanitize_collection_name
+from .string_utils import sanitize_collection_name, is_ipv4_pattern
 from .exceptions.context_window_exceeding_exception import (
     LLMContextLengthExceededException,
 )
@@ -27,4 +27,5 @@ __all__ = [
     "LLMContextLengthExceededException",
     "EmbeddingConfigurator",
     "sanitize_collection_name",
+    "is_ipv4_pattern",
 ]

src/crewai/utilities/string_utils.py

@@ -84,6 +84,28 @@ def interpolate_only(
 
 from typing import Optional
 
+# Constants for ChromaDB collection name requirements
+MIN_LENGTH = 3
+MAX_LENGTH = 63
+DEFAULT_COLLECTION = "default_collection"
+
+# Compiled regex patterns for better performance
+INVALID_CHARS_PATTERN = re.compile(r"[^a-zA-Z0-9_-]")
+IPV4_PATTERN = re.compile(r"^(\d{1,3}\.){3}\d{1,3}$")
+
+
+def is_ipv4_pattern(name: str) -> bool:
+    """
+    Check if a string matches an IPv4 address pattern.
+
+    Args:
+        name: The string to check
+
+    Returns:
+        True if the string matches an IPv4 pattern, False otherwise
+    """
+    return bool(IPV4_PATTERN.match(name))
+
 
 def sanitize_collection_name(name: Optional[str]) -> str:
     """
@@ -101,10 +123,14 @@ def sanitize_collection_name(name: Optional[str]) -> str:
         A sanitized collection name that meets ChromaDB requirements
     """
     if not name:
-        return "default_collection"
+        return DEFAULT_COLLECTION
+
+    # Handle IPv4 pattern
+    if is_ipv4_pattern(name):
+        name = f"ip_{name}"
 
     # Replace spaces and invalid characters with underscores
-    sanitized = re.sub(r"[^a-zA-Z0-9_-]", "_", name)
+    sanitized = INVALID_CHARS_PATTERN.sub("_", name)
 
     # Ensure it starts with alphanumeric
     if not sanitized[0].isalnum():
@@ -114,12 +140,12 @@ def sanitize_collection_name(name: Optional[str]) -> str:
     if not sanitized[-1].isalnum():
         sanitized = sanitized[:-1] + "z"
 
-    # Ensure length is between 3-63 characters
-    if len(sanitized) < 3:
+    # Ensure length is between MIN_LENGTH-MAX_LENGTH characters
+    if len(sanitized) < MIN_LENGTH:
         # Add padding with alphanumeric character at the end
-        sanitized = sanitized + "x" * (3 - len(sanitized))
-    if len(sanitized) > 63:
-        sanitized = sanitized[:63]
+        sanitized = sanitized + "x" * (MIN_LENGTH - len(sanitized))
+    if len(sanitized) > MAX_LENGTH:
+        sanitized = sanitized[:MAX_LENGTH]
         # Ensure it still ends with alphanumeric after truncation
         if not sanitized[-1].isalnum():
             sanitized = sanitized[:-1] + "z"

tests/utilities/test_string_utils.py

@@ -3,7 +3,12 @@ from typing import Any, Dict, List, Union
 
 import pytest
 
-from crewai.utilities.string_utils import interpolate_only, sanitize_collection_name
+from crewai.utilities import is_ipv4_pattern, sanitize_collection_name
+from crewai.utilities.string_utils import (
+    MAX_LENGTH,
+    MIN_LENGTH,
+    interpolate_only,
+)
 
 
 class TestInterpolateOnly:
@@ -193,7 +198,7 @@ class TestStringUtils(unittest.TestCase):
         """Test sanitizing a very long collection name."""
         long_name = "This is an extremely long role name that will definitely exceed the ChromaDB collection name limit of 63 characters and cause an error when used as a collection name"
         sanitized = sanitize_collection_name(long_name)
-        self.assertLessEqual(len(sanitized), 63)
+        self.assertLessEqual(len(sanitized), MAX_LENGTH)
         self.assertTrue(sanitized[0].isalnum())
         self.assertTrue(sanitized[-1].isalnum())
         self.assertTrue(all(c.isalnum() or c in ["_", "-"] for c in sanitized))
@@ -210,7 +215,7 @@ class TestStringUtils(unittest.TestCase):
         """Test sanitizing a very short name."""
         short_name = "A"
         sanitized = sanitize_collection_name(short_name)
-        self.assertGreaterEqual(len(sanitized), 3)
+        self.assertGreaterEqual(len(sanitized), MIN_LENGTH)
         self.assertTrue(sanitized[0].isalnum())
         self.assertTrue(sanitized[-1].isalnum())
 
@@ -226,6 +231,37 @@ class TestStringUtils(unittest.TestCase):
         sanitized = sanitize_collection_name(None)
         self.assertEqual(sanitized, "default_collection")
 
+    def test_sanitize_collection_name_ipv4_pattern(self):
+        """Test sanitizing an IPv4 address."""
+        ipv4 = "192.168.1.1"
+        sanitized = sanitize_collection_name(ipv4)
+        self.assertTrue(sanitized.startswith("ip_"))
+        self.assertTrue(sanitized[0].isalnum())
+        self.assertTrue(sanitized[-1].isalnum())
+        self.assertTrue(all(c.isalnum() or c in ["_", "-"] for c in sanitized))
+
+    def test_is_ipv4_pattern(self):
+        """Test IPv4 pattern detection."""
+        self.assertTrue(is_ipv4_pattern("192.168.1.1"))
+        self.assertFalse(is_ipv4_pattern("not.an.ip.address"))
+
+    def test_sanitize_collection_name_properties(self):
+        """Test that sanitized collection names always meet ChromaDB requirements."""
+        test_cases = [
+            "A" * 100,  # Very long name
+            "_start_with_underscore",
+            "end_with_underscore_",
+            "contains@special#characters",
+            "192.168.1.1",  # IPv4 address
+            "a" * 2,  # Too short
+        ]
+        for test_case in test_cases:
+            sanitized = sanitize_collection_name(test_case)
+            self.assertGreaterEqual(len(sanitized), MIN_LENGTH)
+            self.assertLessEqual(len(sanitized), MAX_LENGTH)
+            self.assertTrue(sanitized[0].isalnum())
+            self.assertTrue(sanitized[-1].isalnum())
+
 
 if __name__ == "__main__":
     unittest.main()