prompt: We are currently solving the following issue within our repository. Here is the issue text:
  --- BEGIN ISSUE ---
  Docstrings - `haystack.components.caching`
  
  
  --- END ISSUE ---
  
  Below are some code segments, each from a relevant file. One or more of these files may contain bugs.
  --- BEGIN FILES ---
  Path: `haystack/components/caching/cache_checker.py`
  Content:
  ```
  1 from typing import List, Dict, Any
  2 
  3 import importlib
  4 
  5 import logging
  6 
  7 from haystack import component, Document, default_from_dict, default_to_dict, DeserializationError
  8 from haystack.document_stores.types import DocumentStore
  9 
  10 
  11 logger = logging.getLogger(__name__)
  12 
  13 
  14 @component
  15 class CacheChecker:
  16     """
  17     CacheChecker is a component that checks for the presence of documents in a Document Store based on a specified
  18     cache field.
  19     """
  20 
  21     def __init__(self, document_store: DocumentStore, cache_field: str):
  22         """
  23         Create a UrlCacheChecker component.
  24         """
  25         self.document_store = document_store
  26         self.cache_field = cache_field
  27 
  28     def to_dict(self) -> Dict[str, Any]:
  29         """
  30         Serialize this component to a dictionary.
  31         """
  32         return default_to_dict(self, document_store=self.document_store.to_dict(), cache_field=self.cache_field)
  33 
  34     @classmethod
  35     def from_dict(cls, data: Dict[str, Any]) -> "CacheChecker":
  36         """
  37         Deserialize this component from a dictionary.
  38         """
  39         init_params = data.get("init_parameters", {})
  40         if "document_store" not in init_params:
  41             raise DeserializationError("Missing 'document_store' in serialization data")
  42         if "type" not in init_params["document_store"]:
  43             raise DeserializationError("Missing 'type' in document store's serialization data")
  44 
  45         try:
  46             module_name, type_ = init_params["document_store"]["type"].rsplit(".", 1)
  47             logger.debug("Trying to import %s", module_name)
  48             module = importlib.import_module(module_name)
  49         except (ImportError, DeserializationError) as e:
  50             raise DeserializationError(
  51                 f"DocumentStore of type '{init_params['document_store']['type']}' not correctly imported"
  52             ) from e
  53 
  54         docstore_class = getattr(module, type_)
  55         docstore = docstore_class.from_dict(init_params["document_store"])
  56 
  57         data["init_parameters"]["document_store"] = docstore
  58         return default_from_dict(cls, data)
  59 
  60     @component.output_types(hits=List[Document], misses=List)
  61     def run(self, items: List[Any]):
  62         """
  63         Checks if any document associated with the specified field is already present in the store. If matching documents
  64         are found, they are returned as hits. If not, the items are returned as misses, indicating they are not in the cache.
  65 
  66         :param items: A list of values associated with the cache_field to be checked against the cache.
  67         :return: A dictionary with two keys: "hits" and "misses". The values are lists of documents that were found in
  68         the cache and items that were not, respectively.
  69         """
  70         found_documents = []
  71         misses = []
  72 
  73         for item in items:
  74             filters = {self.cache_field: item}
  75             found = self.document_store.filter_documents(filters=filters)
  76             if found:
  77                 found_documents.extend(found)
  78             else:
  79                 misses.append(item)
  80         return {"hits": found_documents, "misses": misses}
  81
  ```
  --- END FILES ---
  
  Please first localize the bug based on the issue statement, and then generate a patch according to the `git diff` format fenced by three backticks.
  
  Here is an example:
  
  ```diff
  diff --git a/examples/server_async.py b/examples/server_async.py
  --- a/examples/server_async.py
  +++ b/examples/server_async.py
  @@ -313,4 +313,4 @@
   
   
   if __name__ == "__main__":
  -    asyncio.run(run_async_server("."), debug=True)
  +    asyncio.run(run_async_server(), debug=True)
  diff --git a/examples/server_sync.py b/examples/server_sync.py
  --- a/examples/server_sync.py
  +++ b/examples/server_sync.py
  @@ -313,5 +313,5 @@
   
   
   if __name__ == "__main__":
  -    server = run_sync_server(".")
  +    server = run_sync_server()
       server.shutdown()
  
  ```
  
golden_diff: diff --git a/haystack/components/caching/cache_checker.py b/haystack/components/caching/cache_checker.py
  --- a/haystack/components/caching/cache_checker.py
  +++ b/haystack/components/caching/cache_checker.py
  @@ -14,27 +14,63 @@
   @component
   class CacheChecker:
       """
  -    CacheChecker is a component that checks for the presence of documents in a Document Store based on a specified
  -    cache field.
  +    Checks for the presence of documents in a Document Store based on a specified
  +    field in each document's metadata.
  +
  +    If matching documents are found, they are returned as hits. If not, the items
  +    are returned as misses, indicating they are not in the cache.
  +
  +    Usage example:
  +    ```python
  +    from haystack import Document
  +    from haystack.document_stores.in_memory import InMemoryDocumentStore
  +    from haystack.components.caching.cache_checker import CacheChecker
  +
  +    docstore = InMemoryDocumentStore()
  +    documents = [
  +        Document(content="doc1", meta={"url": "https://example.com/1"}),
  +        Document(content="doc2", meta={"url": "https://example.com/2"}),
  +        Document(content="doc3", meta={"url": "https://example.com/1"}),
  +        Document(content="doc4", meta={"url": "https://example.com/2"}),
  +    ]
  +    docstore.write_documents(documents)
  +    checker = CacheChecker(docstore, cache_field="url")
  +    results = checker.run(items=["https://example.com/1", "https://example.com/5"])
  +    assert results == {"hits": [documents[0], documents[2]], "misses": ["https://example.com/5"]}
  +    ```
       """
   
       def __init__(self, document_store: DocumentStore, cache_field: str):
           """
  -        Create a UrlCacheChecker component.
  +        Create a CacheChecker component.
  +
  +        :param document_store:
  +            Document store to check.
  +        :param cache_field:
  +            Name of the Document metadata field
  +            to check for cache hits.
           """
           self.document_store = document_store
           self.cache_field = cache_field
   
       def to_dict(self) -> Dict[str, Any]:
           """
  -        Serialize this component to a dictionary.
  +        Serializes the component to a dictionary.
  +
  +        :returns:
  +            Dictionary with serialized data.
           """
           return default_to_dict(self, document_store=self.document_store.to_dict(), cache_field=self.cache_field)
   
       @classmethod
       def from_dict(cls, data: Dict[str, Any]) -> "CacheChecker":
           """
  -        Deserialize this component from a dictionary.
  +        Deserializes the component from a dictionary.
  +
  +        :param data:
  +            Dictionary to deserialize from.
  +        :returns:
  +            Deserialized component.
           """
           init_params = data.get("init_parameters", {})
           if "document_store" not in init_params:
  @@ -60,12 +96,15 @@
       @component.output_types(hits=List[Document], misses=List)
       def run(self, items: List[Any]):
           """
  -        Checks if any document associated with the specified field is already present in the store. If matching documents
  -        are found, they are returned as hits. If not, the items are returned as misses, indicating they are not in the cache.
  -
  -        :param items: A list of values associated with the cache_field to be checked against the cache.
  -        :return: A dictionary with two keys: "hits" and "misses". The values are lists of documents that were found in
  -        the cache and items that were not, respectively.
  +        Checks if any document associated with the specified cache field
  +        is already present in the store.
  +
  +        :param items:
  +            Values to be checked against the cache field.
  +        :return:
  +            A dictionary with two keys:
  +            - `hits` - Documents that matched with any of the items.
  +            - `misses` - Items that were not present in any documents.
           """
           found_documents = []
           misses = []
  
verification_info: {"golden_diff": "diff --git a/haystack/components/caching/cache_checker.py b/haystack/components/caching/cache_checker.py\n--- a/haystack/components/caching/cache_checker.py\n+++ b/haystack/components/caching/cache_checker.py\n@@ -14,27 +14,63 @@\n @component\n class CacheChecker:\n     \"\"\"\n-    CacheChecker is a component that checks for the presence of documents in a Document Store based on a specified\n-    cache field.\n+    Checks for the presence of documents in a Document Store based on a specified\n+    field in each document's metadata.\n+\n+    If matching documents are found, they are returned as hits. If not, the items\n+    are returned as misses, indicating they are not in the cache.\n+\n+    Usage example:\n+    ```python\n+    from haystack import Document\n+    from haystack.document_stores.in_memory import InMemoryDocumentStore\n+    from haystack.components.caching.cache_checker import CacheChecker\n+\n+    docstore = InMemoryDocumentStore()\n+    documents = [\n+        Document(content=\"doc1\", meta={\"url\": \"https://example.com/1\"}),\n+        Document(content=\"doc2\", meta={\"url\": \"https://example.com/2\"}),\n+        Document(content=\"doc3\", meta={\"url\": \"https://example.com/1\"}),\n+        Document(content=\"doc4\", meta={\"url\": \"https://example.com/2\"}),\n+    ]\n+    docstore.write_documents(documents)\n+    checker = CacheChecker(docstore, cache_field=\"url\")\n+    results = checker.run(items=[\"https://example.com/1\", \"https://example.com/5\"])\n+    assert results == {\"hits\": [documents[0], documents[2]], \"misses\": [\"https://example.com/5\"]}\n+    ```\n     \"\"\"\n \n     def __init__(self, document_store: DocumentStore, cache_field: str):\n         \"\"\"\n-        Create a UrlCacheChecker component.\n+        Create a CacheChecker component.\n+\n+        :param document_store:\n+            Document store to check.\n+        :param cache_field:\n+            Name of the Document metadata field\n+            to check for cache hits.\n         \"\"\"\n         self.document_store = document_store\n         self.cache_field = cache_field\n \n     def to_dict(self) -> Dict[str, Any]:\n         \"\"\"\n-        Serialize this component to a dictionary.\n+        Serializes the component to a dictionary.\n+\n+        :returns:\n+            Dictionary with serialized data.\n         \"\"\"\n         return default_to_dict(self, document_store=self.document_store.to_dict(), cache_field=self.cache_field)\n \n     @classmethod\n     def from_dict(cls, data: Dict[str, Any]) -> \"CacheChecker\":\n         \"\"\"\n-        Deserialize this component from a dictionary.\n+        Deserializes the component from a dictionary.\n+\n+        :param data:\n+            Dictionary to deserialize from.\n+        :returns:\n+            Deserialized component.\n         \"\"\"\n         init_params = data.get(\"init_parameters\", {})\n         if \"document_store\" not in init_params:\n@@ -60,12 +96,15 @@\n     @component.output_types(hits=List[Document], misses=List)\n     def run(self, items: List[Any]):\n         \"\"\"\n-        Checks if any document associated with the specified field is already present in the store. If matching documents\n-        are found, they are returned as hits. If not, the items are returned as misses, indicating they are not in the cache.\n-\n-        :param items: A list of values associated with the cache_field to be checked against the cache.\n-        :return: A dictionary with two keys: \"hits\" and \"misses\". The values are lists of documents that were found in\n-        the cache and items that were not, respectively.\n+        Checks if any document associated with the specified cache field\n+        is already present in the store.\n+\n+        :param items:\n+            Values to be checked against the cache field.\n+        :return:\n+            A dictionary with two keys:\n+            - `hits` - Documents that matched with any of the items.\n+            - `misses` - Items that were not present in any documents.\n         \"\"\"\n         found_documents = []\n         misses = []\n", "issue": "Docstrings - `haystack.components.caching`\n\n", "before_files": [{"content": "from typing import List, Dict, Any\n\nimport importlib\n\nimport logging\n\nfrom haystack import component, Document, default_from_dict, default_to_dict, DeserializationError\nfrom haystack.document_stores.types import DocumentStore\n\n\nlogger = logging.getLogger(__name__)\n\n\n@component\nclass CacheChecker:\n    \"\"\"\n    CacheChecker is a component that checks for the presence of documents in a Document Store based on a specified\n    cache field.\n    \"\"\"\n\n    def __init__(self, document_store: DocumentStore, cache_field: str):\n        \"\"\"\n        Create a UrlCacheChecker component.\n        \"\"\"\n        self.document_store = document_store\n        self.cache_field = cache_field\n\n    def to_dict(self) -> Dict[str, Any]:\n        \"\"\"\n        Serialize this component to a dictionary.\n        \"\"\"\n        return default_to_dict(self, document_store=self.document_store.to_dict(), cache_field=self.cache_field)\n\n    @classmethod\n    def from_dict(cls, data: Dict[str, Any]) -> \"CacheChecker\":\n        \"\"\"\n        Deserialize this component from a dictionary.\n        \"\"\"\n        init_params = data.get(\"init_parameters\", {})\n        if \"document_store\" not in init_params:\n            raise DeserializationError(\"Missing 'document_store' in serialization data\")\n        if \"type\" not in init_params[\"document_store\"]:\n            raise DeserializationError(\"Missing 'type' in document store's serialization data\")\n\n        try:\n            module_name, type_ = init_params[\"document_store\"][\"type\"].rsplit(\".\", 1)\n            logger.debug(\"Trying to import %s\", module_name)\n            module = importlib.import_module(module_name)\n        except (ImportError, DeserializationError) as e:\n            raise DeserializationError(\n                f\"DocumentStore of type '{init_params['document_store']['type']}' not correctly imported\"\n            ) from e\n\n        docstore_class = getattr(module, type_)\n        docstore = docstore_class.from_dict(init_params[\"document_store\"])\n\n        data[\"init_parameters\"][\"document_store\"] = docstore\n        return default_from_dict(cls, data)\n\n    @component.output_types(hits=List[Document], misses=List)\n    def run(self, items: List[Any]):\n        \"\"\"\n        Checks if any document associated with the specified field is already present in the store. If matching documents\n        are found, they are returned as hits. If not, the items are returned as misses, indicating they are not in the cache.\n\n        :param items: A list of values associated with the cache_field to be checked against the cache.\n        :return: A dictionary with two keys: \"hits\" and \"misses\". The values are lists of documents that were found in\n        the cache and items that were not, respectively.\n        \"\"\"\n        found_documents = []\n        misses = []\n\n        for item in items:\n            filters = {self.cache_field: item}\n            found = self.document_store.filter_documents(filters=filters)\n            if found:\n                found_documents.extend(found)\n            else:\n                misses.append(item)\n        return {\"hits\": found_documents, \"misses\": misses}\n", "path": "haystack/components/caching/cache_checker.py"}], "after_files": [{"content": "from typing import List, Dict, Any\n\nimport importlib\n\nimport logging\n\nfrom haystack import component, Document, default_from_dict, default_to_dict, DeserializationError\nfrom haystack.document_stores.types import DocumentStore\n\n\nlogger = logging.getLogger(__name__)\n\n\n@component\nclass CacheChecker:\n    \"\"\"\n    Checks for the presence of documents in a Document Store based on a specified\n    field in each document's metadata.\n\n    If matching documents are found, they are returned as hits. If not, the items\n    are returned as misses, indicating they are not in the cache.\n\n    Usage example:\n    ```python\n    from haystack import Document\n    from haystack.document_stores.in_memory import InMemoryDocumentStore\n    from haystack.components.caching.cache_checker import CacheChecker\n\n    docstore = InMemoryDocumentStore()\n    documents = [\n        Document(content=\"doc1\", meta={\"url\": \"https://example.com/1\"}),\n        Document(content=\"doc2\", meta={\"url\": \"https://example.com/2\"}),\n        Document(content=\"doc3\", meta={\"url\": \"https://example.com/1\"}),\n        Document(content=\"doc4\", meta={\"url\": \"https://example.com/2\"}),\n    ]\n    docstore.write_documents(documents)\n    checker = CacheChecker(docstore, cache_field=\"url\")\n    results = checker.run(items=[\"https://example.com/1\", \"https://example.com/5\"])\n    assert results == {\"hits\": [documents[0], documents[2]], \"misses\": [\"https://example.com/5\"]}\n    ```\n    \"\"\"\n\n    def __init__(self, document_store: DocumentStore, cache_field: str):\n        \"\"\"\n        Create a CacheChecker component.\n\n        :param document_store:\n            Document store to check.\n        :param cache_field:\n            Name of the Document metadata field\n            to check for cache hits.\n        \"\"\"\n        self.document_store = document_store\n        self.cache_field = cache_field\n\n    def to_dict(self) -> Dict[str, Any]:\n        \"\"\"\n        Serializes the component to a dictionary.\n\n        :returns:\n            Dictionary with serialized data.\n        \"\"\"\n        return default_to_dict(self, document_store=self.document_store.to_dict(), cache_field=self.cache_field)\n\n    @classmethod\n    def from_dict(cls, data: Dict[str, Any]) -> \"CacheChecker\":\n        \"\"\"\n        Deserializes the component from a dictionary.\n\n        :param data:\n            Dictionary to deserialize from.\n        :returns:\n            Deserialized component.\n        \"\"\"\n        init_params = data.get(\"init_parameters\", {})\n        if \"document_store\" not in init_params:\n            raise DeserializationError(\"Missing 'document_store' in serialization data\")\n        if \"type\" not in init_params[\"document_store\"]:\n            raise DeserializationError(\"Missing 'type' in document store's serialization data\")\n\n        try:\n            module_name, type_ = init_params[\"document_store\"][\"type\"].rsplit(\".\", 1)\n            logger.debug(\"Trying to import %s\", module_name)\n            module = importlib.import_module(module_name)\n        except (ImportError, DeserializationError) as e:\n            raise DeserializationError(\n                f\"DocumentStore of type '{init_params['document_store']['type']}' not correctly imported\"\n            ) from e\n\n        docstore_class = getattr(module, type_)\n        docstore = docstore_class.from_dict(init_params[\"document_store\"])\n\n        data[\"init_parameters\"][\"document_store\"] = docstore\n        return default_from_dict(cls, data)\n\n    @component.output_types(hits=List[Document], misses=List)\n    def run(self, items: List[Any]):\n        \"\"\"\n        Checks if any document associated with the specified cache field\n        is already present in the store.\n\n        :param items:\n            Values to be checked against the cache field.\n        :return:\n            A dictionary with two keys:\n            - `hits` - Documents that matched with any of the items.\n            - `misses` - Items that were not present in any documents.\n        \"\"\"\n        found_documents = []\n        misses = []\n\n        for item in items:\n            filters = {self.cache_field: item}\n            found = self.document_store.filter_documents(filters=filters)\n            if found:\n                found_documents.extend(found)\n            else:\n                misses.append(item)\n        return {\"hits\": found_documents, \"misses\": misses}\n", "path": "haystack/components/caching/cache_checker.py"}]}