Skip functions with undefined types.

taskiq_dependencies/dependency.py

@@ -156,3 +156,15 @@ def __eq__(self, rhs: object) -> bool:
         if not isinstance(rhs, Dependency):
             return False
         return self._id == rhs._id
+
+    def __repr__(self) -> str:
+        func_name = str(self.dependency)
+        if self.dependency is not None and hasattr(self.dependency, "__name__"):
+            func_name = self.dependency.__name__
+        return (
+            f"Dependency({func_name}, "
+            f"use_cache={self.use_cache}, "
+            f"kwargs={self.kwargs}, "
+            f"parent={self.parent}"
+            ")"
+        )

taskiq_dependencies/graph.py

@@ -1,6 +1,8 @@
 import inspect
 import sys
+import warnings
 from collections import defaultdict, deque
+from pathlib import Path
 from typing import Any, Callable, Dict, List, Optional, TypeVar, get_type_hints
 
 from graphlib import TopologicalSorter
@@ -171,19 +173,64 @@ def _build_graph(self) -> None:  # noqa: C901
             if inspect.isclass(origin):
                 # If this is a class, we need to get signature of
                 # an __init__ method.
-                hints = get_type_hints(origin.__init__)
+                try:
+                    hints = get_type_hints(origin.__init__)
+                except NameError:
+                    _, src_lineno = inspect.getsourcelines(origin)
+                    src_file = Path(inspect.getfile(origin)).relative_to(
+                        Path.cwd(),
+                    )
+                    warnings.warn(
+                        "Cannot resolve type hints for "
+                        f"a class {origin.__name__} defined "
+                        f"at {src_file}:{src_lineno}.",
+                        RuntimeWarning,
+                        stacklevel=2,
+                    )
+                    continue
                 sign = inspect.signature(
                     origin.__init__,
                     **signature_kwargs,
                 )
             elif inspect.isfunction(dep.dependency):
                 # If this is function or an instance of a class, we get it's type hints.
-                hints = get_type_hints(dep.dependency)
+                try:
+                    hints = get_type_hints(dep.dependency)
+                except NameError:
+                    _, src_lineno = inspect.getsourcelines(dep.dependency)  # type: ignore
+                    src_file = Path(inspect.getfile(dep.dependency)).relative_to(
+                        Path.cwd(),
+                    )
+                    warnings.warn(
+                        "Cannot resolve type hints for "
+                        f"a function {dep.dependency.__name__} defined "
+                        f"at {src_file}:{src_lineno}.",
+                        RuntimeWarning,
+                        stacklevel=2,
+                    )
+                    continue
                 sign = inspect.signature(origin, **signature_kwargs)  # type: ignore
             else:
-                hints = get_type_hints(
-                    dep.dependency.__call__,  # type: ignore
-                )
+                try:
+                    hints = get_type_hints(
+                        dep.dependency.__call__,  # type: ignore
+                    )
+                except NameError:
+                    _, src_lineno = inspect.getsourcelines(dep.dependency.__class__)
+                    src_file = Path(
+                        inspect.getfile(dep.dependency.__class__),
+                    ).relative_to(
+                        Path.cwd(),
+                    )
+                    cls_name = dep.dependency.__class__.__name__
+                    warnings.warn(
+                        "Cannot resolve type hints for "
+                        f"an object of class {cls_name} defined "
+                        f"at {src_file}:{src_lineno}.",
+                        RuntimeWarning,
+                        stacklevel=2,
+                    )
+                    continue
                 sign = inspect.signature(origin, **signature_kwargs)  # type: ignore
 
             # Now we need to iterate over parameters, to

tests/test_graph.py

@@ -1,7 +1,15 @@
 import re
 import uuid
 from contextlib import asynccontextmanager, contextmanager
-from typing import Any, AsyncGenerator, Generator, Generic, Tuple, TypeVar
+from typing import (
+    TYPE_CHECKING,
+    Any,
+    AsyncGenerator,
+    Generator,
+    Generic,
+    Tuple,
+    TypeVar,
+)
 
 import pytest
 
@@ -891,3 +899,56 @@ def target(info: ParamInfo = Depends(inner_dep, use_cache=False)) -> None:
     assert info.name == ""
     assert info.definition is None
     assert info.graph == graph
+
+
+def test_skip_type_checking_function() -> None:
+    """Test if we can skip type only for type checking for the function."""
+    if TYPE_CHECKING:
+
+        class A:
+            pass
+
+    def target(unknown: "A") -> None:
+        pass
+
+    with pytest.warns(RuntimeWarning, match=r"Cannot resolve.*function target.*"):
+        graph = DependencyGraph(target=target)
+    with graph.sync_ctx() as ctx:
+        assert "unknown" not in ctx.resolve_kwargs()
+
+
+def test_skip_type_checking_class() -> None:
+    """Test if we can skip type only for type checking for the function."""
+    if TYPE_CHECKING:
+
+        class A:
+            pass
+
+    class Target:
+        def __init__(self, unknown: "A") -> None:
+            pass
+
+    with pytest.warns(RuntimeWarning, match=r"Cannot resolve.*class Target.*"):
+        graph = DependencyGraph(target=Target)
+    with graph.sync_ctx() as ctx:
+        assert "unknown" not in ctx.resolve_kwargs()
+
+
+def test_skip_type_checking_object() -> None:
+    """Test if we can skip type only for type checking for the function."""
+    if TYPE_CHECKING:
+
+        class A:
+            pass
+
+    class Target:
+        def __call__(self, unknown: "A") -> None:
+            pass
+
+    with pytest.warns(
+        RuntimeWarning,
+        match=r"Cannot resolve.*object of class Target.*",
+    ):
+        graph = DependencyGraph(target=Target())
+    with graph.sync_ctx() as ctx:
+        assert "unknown" not in ctx.resolve_kwargs()