Merge pull request #40 from ZeroIntensity/type-validation

Type Validation

Author: ZeroIntensity

CHANGELOG.md

@@ -5,6 +5,14 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [1.0.0-alpha4] - 2023-09-10
+- Added type validation (without support for `__view_body__`)
+- Patched query strings on app testing
+- Added tests for query and body parameters
+- Patched body parameters
+- Documented type validation
+- Patched bodies with testing
+
 ## [1.0.0-alpha3] - 2023-09-9
 - Patched header responses
 - Added tests for headers

docs/parameters.md

@@ -19,13 +19,9 @@ app.run()
 
 The first argument is the name of the parameter in the query string, **not the argument name**, and the second argument is the type that it should take.
 
-!!! danger
-
-    view.py has not yet implemented type checking on parameters
-
 ## Body
 
-Bodies work the exact same way, but with the `body` decorator instead:
+Bodies work the exact same way as queries, but with the `body` decorator instead:
 
 ```py
 @app.get("/goodbye")
@@ -62,3 +58,51 @@ async def token(user_id: str, token: str):
 !!! danger
 
     This is extremely buggy and not yet recommended for general use.
+
+## Type Validation
+
+view.py will ensure that the type sent to the server is compatible with what you passed to the decorator. For example:
+
+```py
+@app.get("/")
+@query("number", int)
+async def index(number: int):
+    # number will always be an int.
+    # if it isn't, an error 400 is sent back to the user automatically
+    return "..."
+```
+
+The following types are supported:
+
+- `typing.Any`
+- `str`
+- `int`
+- `bool`
+- `float`
+- `dict` (or `typing.Dict`)
+- `None`
+
+You can allow unions by just passing more parameters:
+
+```py
+@app.get('/hello')
+@query("name", str, None)
+async def hello(name: str | None):
+    if not name:
+        return "hello world"
+
+    return f"hello {name}"
+```
+
+You can pass type arguments to a `dict`, which are also validated by the server:
+
+```py
+@app.get("/something")
+@body("data", dict[str, int])  # typing.Dict on 3.8 and 3.9
+async def something(data: dict[str, int]):
+    # data will always be a dictionary of strings and integers
+    return "..."
+```
+
+The key in a dictionary must always be `str` (i.e. `dict[int, str]` is not allowed), but the value can be any supported type (including other dictionaries!)
+

setup.py

@@ -11,7 +11,7 @@
         data = toml.load(f)
     setup(
         name="view.py",
-        version="1.0.0-alpha3",
+        version="1.0.0-alpha4",
         packages=["view"],
         project_urls=data["project"]["urls"],
         package_dir={"": "src"},