refactor: improve Ollama embedder with validation and tests

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

src/crewai/utilities/embedding_configurator.py

@@ -1,11 +1,36 @@
+import logging
 import os
-from typing import Any, Dict, cast
+import urllib.parse
+from typing import Any, Dict, Optional, cast
 
 from chromadb import Documents, EmbeddingFunction, Embeddings
 from chromadb.api.types import validate_embedding_function
 
+logger = logging.getLogger(__name__)
+
 
 class EmbeddingConfigurator:
+    @staticmethod
+    def _validate_url(url: str) -> str:
+        """Validate URL format.
+        
+        Args:
+            url: URL to validate
+            
+        Returns:
+            str: The validated URL
+            
+        Raises:
+            ValueError: If URL is invalid
+        """
+        try:
+            result = urllib.parse.urlparse(url)
+            if all([result.scheme, result.netloc]):
+                return url
+            raise ValueError(f"Invalid URL format: {url}")
+        except Exception as e:
+            raise ValueError(f"Invalid URL: {str(e)}")
+
     def __init__(self):
         self.embedding_functions = {
             "openai": self._configure_openai,
@@ -81,24 +106,31 @@ class EmbeddingConfigurator:
         )
 
     @staticmethod
-    def _configure_ollama(config, model_name):
+    def _configure_ollama(config: Dict[str, Any], model_name: Optional[str]) -> EmbeddingFunction:
         """Configure Ollama embedder with flexible URL configuration.
         
         Args:
-            config: Configuration dictionary that supports multiple URL keys:
-                - url: Legacy key (default: http://localhost:11434/api/embeddings)
-                - api_url: Alternative key following HuggingFace pattern
-                - base_url: Alternative key
-                - api_base: Alternative key following Azure pattern
+            config: Configuration dictionary that supports multiple URL keys in priority order:
+                1. url: Legacy key (highest priority)
+                2. api_url: Alternative key following HuggingFace pattern
+                3. base_url: Alternative key
+                4. api_base: Alternative key following Azure pattern
+                Default: http://localhost:11434/api/embeddings
             model_name: Name of the Ollama model to use
             
         Returns:
             OllamaEmbeddingFunction: Configured embedder instance
+            
+        Raises:
+            ValueError: If URL is invalid or model name is missing
         """
         from chromadb.utils.embedding_functions.ollama_embedding_function import (
             OllamaEmbeddingFunction,
         )
 
+        if not model_name:
+            raise ValueError("Model name is required for Ollama embedder configuration")
+
         url = (
             config.get("url")
             or config.get("api_url")
@@ -106,9 +138,12 @@ class EmbeddingConfigurator:
             or config.get("api_base")
             or "http://localhost:11434/api/embeddings"
         )
+        
+        validated_url = EmbeddingConfigurator._validate_url(url)
+        logger.info(f"Configuring Ollama embedder with URL: {validated_url}")
 
         return OllamaEmbeddingFunction(
-            url=url,
+            url=validated_url,
             model_name=model_name,
         )
 

tests/embedder_test.py

@@ -2,55 +2,88 @@ import pytest
 from unittest.mock import patch
 from crewai.utilities.embedding_configurator import EmbeddingConfigurator
 
-def test_ollama_embedder_url_config():
-    configurator = EmbeddingConfigurator()
-    
-    test_cases = [
-        # Test default URL
-        {
-            "config": {"provider": "ollama", "config": {"model": "test-model"}},
-            "expected_url": "http://localhost:11434/api/embeddings"
-        },
-        # Test legacy url key
-        {
-            "config": {"provider": "ollama", "config": {"model": "test-model", "url": "http://custom:11434"}},
-            "expected_url": "http://custom:11434"
-        },
-        # Test api_url key
-        {
-            "config": {"provider": "ollama", "config": {"model": "test-model", "api_url": "http://api:11434"}},
-            "expected_url": "http://api:11434"
-        },
-        # Test base_url key
-        {
-            "config": {"provider": "ollama", "config": {"model": "test-model", "base_url": "http://base:11434"}},
-            "expected_url": "http://base:11434"
-        },
-        # Test api_base key
-        {
-            "config": {"provider": "ollama", "config": {"model": "test-model", "api_base": "http://base-api:11434"}},
-            "expected_url": "http://base-api:11434"
-        },
-        # Test URL precedence order
-        {
-            "config": {
-                "provider": "ollama",
-                "config": {
-                    "model": "test-model",
-                    "url": "http://url:11434",
-                    "api_url": "http://api:11434",
-                    "base_url": "http://base:11434",
-                    "api_base": "http://base-api:11434"
-                }
+@pytest.mark.parametrize(
+    "test_case",
+    [
+        pytest.param(
+            {
+                "config": {"provider": "ollama", "config": {"model": "test-model"}},
+                "expected_url": "http://localhost:11434/api/embeddings"
             },
-            "expected_url": "http://url:11434"  # url key should have highest precedence
-        }
+            id="default_url"
+        ),
+        pytest.param(
+            {
+                "config": {"provider": "ollama", "config": {"model": "test-model", "url": "http://custom:11434"}},
+                "expected_url": "http://custom:11434"
+            },
+            id="legacy_url"
+        ),
+        pytest.param(
+            {
+                "config": {"provider": "ollama", "config": {"model": "test-model", "api_url": "http://api:11434"}},
+                "expected_url": "http://api:11434"
+            },
+            id="api_url"
+        ),
+        pytest.param(
+            {
+                "config": {"provider": "ollama", "config": {"model": "test-model", "base_url": "http://base:11434"}},
+                "expected_url": "http://base:11434"
+            },
+            id="base_url"
+        ),
+        pytest.param(
+            {
+                "config": {"provider": "ollama", "config": {"model": "test-model", "api_base": "http://base-api:11434"}},
+                "expected_url": "http://base-api:11434"
+            },
+            id="api_base"
+        ),
+        pytest.param(
+            {
+                "config": {
+                    "provider": "ollama",
+                    "config": {
+                        "model": "test-model",
+                        "url": "http://url:11434",
+                        "api_url": "http://api:11434",
+                        "base_url": "http://base:11434",
+                        "api_base": "http://base-api:11434"
+                    }
+                },
+                "expected_url": "http://url:11434"
+            },
+            id="url_precedence"
+        ),
     ]
+)
+def test_ollama_embedder_url_config(test_case):
+    configurator = EmbeddingConfigurator()
+    with patch("chromadb.utils.embedding_functions.ollama_embedding_function.OllamaEmbeddingFunction") as mock_ollama:
+        configurator.configure_embedder(test_case["config"])
+        mock_ollama.assert_called_once()
+        _, kwargs = mock_ollama.call_args
+        assert kwargs["url"] == test_case["expected_url"]
+        mock_ollama.reset_mock()
 
-    for test_case in test_cases:
-        with patch("chromadb.utils.embedding_functions.ollama_embedding_function.OllamaEmbeddingFunction") as mock_ollama:
-            configurator.configure_embedder(test_case["config"])
-            mock_ollama.assert_called_once()
-            _, kwargs = mock_ollama.call_args
-            assert kwargs["url"] == test_case["expected_url"]
-            mock_ollama.reset_mock()
+def test_ollama_embedder_invalid_url():
+    configurator = EmbeddingConfigurator()
+    with pytest.raises(ValueError, match="Invalid URL format"):
+        configurator.configure_embedder({
+            "provider": "ollama",
+            "config": {
+                "model": "test-model",
+                "url": "invalid-url"
+            }
+        })
+
+def test_ollama_embedder_missing_model():
+    configurator = EmbeddingConfigurator()
+    with pytest.raises(ValueError, match="Model name is required"):
+        configurator.configure_embedder({
+            "provider": "ollama",
+            "config": {
+                "url": "http://valid:11434"
+            }
+        })