docarray · samsja · Mar 23, 2023 · Mar 23, 2023 · Mar 23, 2023 · Mar 23, 2023
diff --git a/docarray/documents/helper.py b/docarray/documents/helper.py
@@ -73,7 +73,7 @@ def create_doc(
     return doc
 
 
-def create_from_typeddict(
+def create_doc_from_typeddict(
     typeddict_cls: Type['TypedDict'],  # type: ignore
     **kwargs: Any,
 ):
@@ -91,7 +91,7 @@ def create_from_typeddict(
 
         from docarray import BaseDocument
         from docarray.documents import Audio
-        from docarray.documents.helper import create_from_typeddict
+        from docarray.documents.helper import create_doc_from_typeddict
         from docarray.typing.tensor.audio import AudioNdArray
 
 
@@ -100,7 +100,7 @@ class MyAudio(TypedDict):
             tensor: AudioNdArray
 
 
-        Doc = create_from_typeddict(MyAudio, __base__=Audio)
+        Doc = create_doc_from_typeddict(MyAudio, __base__=Audio)
 
         assert issubclass(Doc, BaseDocument)
         assert issubclass(Doc, Audio)
@@ -118,3 +118,39 @@ class MyAudio(TypedDict):
     doc = create_model_from_typeddict(typeddict_cls, **kwargs)
 
     return doc
+
+
+def create_doc_from_dict(model_name: str, data_dict: Dict[str, Any]) -> Type['T_doc']:
+    """
+    Create a subclass of BaseDocument based on example data given as a dictionary.
+
+    In case the example contains None as a value,
+    corresponding field will be viewed as the type Any.
+
+    :param model_name: Name of the new Document class
+    :param data_dict: Dictionary of field types to their corresponding values.
+    :return: the new Document class
+
+    EXAMPLE USAGE
+
+    .. code-block:: python
+
+        import numpy as np
+        from docarray.documents import ImageDoc
+        from docarray.documents.helper import create_doc_from_dict
+
+        data_dict = {'image': ImageDoc(tensor=np.random.rand(3, 224, 224)), 'author': 'me'}
+
+        MyDoc = create_doc_from_dict(model_name='MyDoc', data_dict=data_dict)
+
+        assert issubclass(MyDoc, BaseDocument)
+
+    """
+    if not data_dict:
+        raise ValueError('`data_dict` should contain at least one item')
+
+    field_types = {
+        field: (type(value) if value else Any, ...)
+        for field, value in data_dict.items()
+    }
+    return create_doc(__model_name=model_name, **field_types)  # type: ignore
diff --git a/tests/integrations/document/test_document.py b/tests/integrations/document/test_document.py
@@ -2,12 +2,16 @@
 
 import numpy as np
 import pytest
-from pydantic import BaseModel
+from pydantic import BaseModel, ValidationError
 from typing_extensions import TypedDict
 
 from docarray import BaseDocument, DocumentArray
 from docarray.documents import AudioDoc, ImageDoc, TextDoc
-from docarray.documents.helper import create_doc, create_from_typeddict
+from docarray.documents.helper import (
+    create_doc,
+    create_doc_from_typeddict,
+    create_doc_from_dict,
+)
 from docarray.typing import AudioNdArray
 
 
@@ -78,23 +82,69 @@ def test_create_doc():
     assert issubclass(MyAudio, AudioDoc)
 
 
-def test_create_from_typeddict():
+def test_create_doc_from_typeddict():
     class MyMultiModalDoc(TypedDict):
         image: ImageDoc
         text: TextDoc
 
     with pytest.raises(ValueError):
-        _ = create_from_typeddict(MyMultiModalDoc, __base__=BaseModel)
+        _ = create_doc_from_typeddict(MyMultiModalDoc, __base__=BaseModel)
 
-    Doc = create_from_typeddict(MyMultiModalDoc)
+    Doc = create_doc_from_typeddict(MyMultiModalDoc)
 
     assert issubclass(Doc, BaseDocument)
 
     class MyAudio(TypedDict):
         title: str
         tensor: Optional[AudioNdArray]
 
-    Doc = create_from_typeddict(MyAudio, __base__=AudioDoc)
+    Doc = create_doc_from_typeddict(MyAudio, __base__=AudioDoc)
 
     assert issubclass(Doc, BaseDocument)
     assert issubclass(Doc, AudioDoc)
+
+
+def test_create_doc_from_dict():
+    data_dict = {
+        'image': ImageDoc(tensor=np.random.rand(3, 224, 224)),
+        'text': TextDoc(text='hello'),
+        'id': 123,
+    }
+
+    MyDoc = create_doc_from_dict(model_name='MyDoc', data_dict=data_dict)
+
+    assert issubclass(MyDoc, BaseDocument)
+
+    doc = MyDoc(
+        image=ImageDoc(tensor=np.random.rand(3, 224, 224)),
+        text=TextDoc(text='hey'),
+        id=111,
+    )
+
+    assert isinstance(doc, BaseDocument)
+    assert isinstance(doc.text, TextDoc)
+    assert isinstance(doc.image, ImageDoc)
+    assert isinstance(doc.id, int)
+
+    # Create a doc with an incorrect type
+    with pytest.raises(ValidationError):
+        doc = MyDoc(
+            image=ImageDoc(tensor=np.random.rand(3, 224, 224)),
+            text=['some', 'text'],  # should be TextDoc
+            id=111,
+        )
+
+    # Handle empty data_dict
+    with pytest.raises(ValueError):
+        MyDoc = create_doc_from_dict(model_name='MyDoc', data_dict={})
+
+    # Data with a None value
+    data_dict = {'text': 'some text', 'other': None}
+    MyDoc = create_doc_from_dict(model_name='MyDoc', data_dict=data_dict)
+
+    assert issubclass(MyDoc, BaseDocument)
+
+    doc1 = MyDoc(text='txt', other=10)
+    doc2 = MyDoc(text='txt', other='also text')
+
+    assert isinstance(doc1, BaseDocument) and isinstance(doc2, BaseDocument)