fix tests and precommit

Author: raguiar2

README.md

@@ -39,13 +39,15 @@ This will automatically add fields for the model's columns, relationships, assoc
 and hybrid properties. For example:
 
 ```python
-# in another file
+# elsewhere
 strawberry_sqlalchemy_mapper = StrawberrySQLAlchemyMapper()
 @strawberry_sqlalchemy_mapper.type(models.Employee)
 class Employee:
     pass
 ```
 
+Several examples to help you get started are provided in the `examples` directory.
+
 ## Limitations
 
 Natively supports the following SQLAlchemy types:
@@ -76,7 +78,6 @@ although support for `TypeDecorator` types is untested.
 Association proxies are expected to be of the form `association_proxy('relationship1', 'relationship2')`,
 i.e., both properties are expected to be relationships.
 
-
 ## Contributing
 
 We encourage you to contribute to strawberry-sqlalchemy-mapper! Any contributions you make are greatly appreciated.

examples/flask/app.py

@@ -0,0 +1,43 @@
+# Small self-contained Flask app to demonstrate basic strawberry-sqlalchemy-mapper use
+import strawberry
+from flask import Flask
+from sqlalchemy import Column, Integer, String
+from sqlalchemy.ext.declarative import declarative_base
+from strawberry.flask.views import GraphQLView
+
+from strawberry_sqlalchemy_mapper import StrawberrySQLAlchemyMapper
+
+Base = declarative_base()
+
+
+class Employee(Base):
+    __tablename__ = "employee"
+    id = Column(Integer, autoincrement=True, primary_key=True)
+    name = Column(String, nullable=False)
+
+
+strawberry_sqlalchemy_mapper = StrawberrySQLAlchemyMapper()
+
+
+@strawberry_sqlalchemy_mapper.type(Employee)
+class Employee:
+    pass
+
+
+@strawberry.type
+class EmployeeQuery:
+    @strawberry.field
+    def employee(self, id: str):
+        return Employee(id=id, name="John Doe")
+
+
+app = Flask(__name__)
+
+schema = strawberry.Schema(
+    query=EmployeeQuery,
+)
+
+app.add_url_rule(
+    "/graphql",
+    view_func=GraphQLView.as_view("graphql_view", schema=schema),
+)