📌 Make pymongo always required, as Motor deeply depends on it (e.g. f…

…or bulk writes)

odmantic/engine.py

@@ -21,22 +21,17 @@
 )
 
 from pydantic.utils import lenient_issubclass
+from pymongo import MongoClient
+from pymongo.client_session import ClientSession
+from pymongo.collection import Collection
+from pymongo.command_cursor import CommandCursor
+from pymongo.database import Database
 
 from odmantic.exceptions import DocumentNotFoundError
 from odmantic.field import FieldProxy, ODMReference
 from odmantic.model import Model
 from odmantic.query import QueryExpression, SortExpression, and_
 
-try:
-    import pymongo
-    from pymongo import MongoClient
-    from pymongo.client_session import ClientSession
-    from pymongo.collection import Collection
-    from pymongo.command_cursor import CommandCursor
-    from pymongo.database import Database
-except ImportError:  # pragma: no cover
-    pymongo = None
-
 try:
     import motor
     from motor.motor_asyncio import (
@@ -546,16 +541,7 @@ def __init__(
             client: instance of a PyMongo client. If None, a default one
                     will be created
             database: name of the database to use
-
-        <!---
-        #noqa: DAR401 RuntimeError
-        -->
         """
-        if not pymongo:
-            raise RuntimeError(
-                "pymongo is required to use SyncEngine, install it with:\n\n"
-                + 'pip install "odmantic[pymongo]"'
-            )
         if client is None:
             client = MongoClient()
         super().__init__(client=client, database=database)

pyproject.toml

@@ -38,6 +38,7 @@ dependencies = [
     "pydantic >=1.6.2,!=1.7,!=1.7.1,!=1.7.2,!=1.7.3,!=1.8,!=1.8.1,<1.10.0",
     "importlib-metadata >=1,<5; python_version<'3.8'",
     "typing-extensions >= 3.7.4.3; python_version<'3.8'",
+    "pymongo >=3.11.0,<5.0.0",
 ]
 [project.optional-dependencies]
 fastapi = ["fastapi >=0.61.1,<0.69.0"]
@@ -70,7 +71,6 @@ doc = [
 ]
 dev = ["ipython ~= 7.16.1"]
 motor = ["motor >=2.1.0,<3.1.0"]
-pymongo = ["pymongo >=3.11.0,<5.0.0"]
 
 [project.urls]
 Documentation = "https://art049.github.io/odmantic"