Improve typing

.github/workflows/tests.yml

@@ -3,6 +3,34 @@ name: Tests
 on: [push, pull_request]
 
 jobs:
+  lint:
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        tool:
+          - flake8
+          - mypy
+          - black --diff --check
+
+    steps:
+    - uses: actions/checkout@v3
+    - name: Set up Python 3.7
+      uses: actions/setup-python@v4
+      with:
+        python-version: "3.7"
+        cache: pip
+        cache-dependency-path: |
+          requirements/base.pip
+          requirements/test.pip
+    - name: Install dependencies
+      run: |
+        python -m pip install --upgrade pip
+        pip install -r requirements/test.pip
+    - name: Run ${{ matrix.tool }} static check
+      run: |
+        python3 -m ${{ matrix.tool }} flask_pydantic/ tests/
+
   build:
     runs-on: ${{ matrix.os }}
     strategy:
@@ -12,19 +40,19 @@ jobs:
         os: [ubuntu-latest, macOS-latest]
 
     steps:
-    - uses: actions/checkout@v1
+    - uses: actions/checkout@v3
     - name: Set up Python ${{ matrix.python-version }}
-      uses: actions/setup-python@v1
+      uses: actions/setup-python@v4
       with:
         python-version: ${{ matrix.python-version }}
+        cache: pip
+        cache-dependency-path: |
+          requirements/base.pip
+          requirements/test.pip
     - name: Install dependencies
-      if: steps.cache-pip.outputs.cache-hit != 'true'
       run: |
         python -m pip install --upgrade pip
         pip install -r requirements/test.pip
     - name: Test with pytest
       run: |
         python3 -m pytest
-    - name: Lint with flake8
-      run: |
-        flake8 .

flask_pydantic/converters.py

@@ -1,12 +1,12 @@
-from typing import Type
+from typing import Dict, List, Type, Union
 
 from pydantic import BaseModel
-from werkzeug.datastructures import ImmutableMultiDict
+from werkzeug.datastructures import MultiDict
 
 
 def convert_query_params(
-    query_params: ImmutableMultiDict, model: Type[BaseModel]
-) -> dict:
+    query_params: "MultiDict[str, str]", model: Type[BaseModel]
+) -> Dict[str, Union[str, List[str]]]:
     """
     group query parameters into lists if model defines them