If you open in your browser a URL like:
```
-http://127.0.0.1:8000/users/2/items/foo-item
+http://127.0.0.1:8000/items/foo-item
```
...without adding the required parameter `needy`, you will see an error like:
As `needy` is a required parameter, you would need to set it in the URL:
```
-http://127.0.0.1:8000/users/2/items/foo-item?needy=sooooneedy
+http://127.0.0.1:8000/items/foo-item?needy=sooooneedy
```
...this would work:
```JSON
{
"item_id": "foo-item",
- "owner_id": 2,
"needy": "sooooneedy"
}
-```
\ No newline at end of file
+```
+
+And of course, you can define some parameters as required, some as having a default value, and some entirely optional:
+
+```Python hl_lines="7"
+{!./tutorial/src/query_params/tutorial006.py!}
+```
+
+In this case, there are 3 query parameters:
+
+* `needy`, a required `str`.
+* `skip`, an `int` with a default value of `0`.
+* `limit`, an optional `int`.
app = FastAPI()
-@app.get("/users/{user_id}/items/{item_id}")
-async def read_user_item(user_id: int, item_id: str, needy: str):
- item = {"item_id": item_id, "owner_id": user_id, "needy": needy}
+@app.get("/items/{item_id}")
+async def read_user_item(item_id: str, needy: str):
+ item = {"item_id": item_id, "needy": needy}
return item
--- /dev/null
+from fastapi import FastAPI
+
+app = FastAPI()
+
+
+@app.get("/items/{item_id}")
+async def read_user_item(item_id: str, needy: str, skip: int = 0, limit: int = None):
+ item = {"item_id": item_id, "needy": needy, "skip": skip, "limit": limit}
+ return item
-import sys
-
import pytest
from starlette.testclient import TestClient
client = TestClient(app)
-
-print(sys.path)
-
openapi_schema = {
"openapi": "3.0.2",
"info": {"title": "Fast API", "version": "0.1.0"},
--- /dev/null
+import pytest
+from starlette.testclient import TestClient
+
+from query_params.tutorial005 import app
+
+client = TestClient(app)
+
+openapi_schema = {
+ "openapi": "3.0.2",
+ "info": {"title": "Fast API", "version": "0.1.0"},
+ "paths": {
+ "/items/{item_id}": {
+ "get": {
+ "responses": {
+ "200": {
+ "description": "Successful Response",
+ "content": {"application/json": {"schema": {}}},
+ },
+ "422": {
+ "description": "Validation Error",
+ "content": {
+ "application/json": {
+ "schema": {
+ "$ref": "#/components/schemas/HTTPValidationError"
+ }
+ }
+ },
+ },
+ },
+ "summary": "Read User Item Get",
+ "operationId": "read_user_item_items__item_id__get",
+ "parameters": [
+ {
+ "required": True,
+ "schema": {"title": "Item_Id", "type": "string"},
+ "name": "item_id",
+ "in": "path",
+ },
+ {
+ "required": True,
+ "schema": {"title": "Needy", "type": "string"},
+ "name": "needy",
+ "in": "query",
+ },
+ ],
+ }
+ }
+ },
+ "components": {
+ "schemas": {
+ "ValidationError": {
+ "title": "ValidationError",
+ "required": ["loc", "msg", "type"],
+ "type": "object",
+ "properties": {
+ "loc": {
+ "title": "Location",
+ "type": "array",
+ "items": {"type": "string"},
+ },
+ "msg": {"title": "Message", "type": "string"},
+ "type": {"title": "Error Type", "type": "string"},
+ },
+ },
+ "HTTPValidationError": {
+ "title": "HTTPValidationError",
+ "type": "object",
+ "properties": {
+ "detail": {
+ "title": "Detail",
+ "type": "array",
+ "items": {"$ref": "#/components/schemas/ValidationError"},
+ }
+ },
+ },
+ }
+ },
+}
+
+
+query_required = {
+ "detail": [
+ {
+ "loc": ["query", "needy"],
+ "msg": "field required",
+ "type": "value_error.missing",
+ }
+ ]
+}
+
+
+@pytest.mark.parametrize(
+ "path,expected_status,expected_response",
+ [
+ ("/openapi.json", 200, openapi_schema),
+ ("/items/foo?needy=very", 200, {"item_id": "foo", "needy": "very"}),
+ ("/items/foo", 422, query_required),
+ ("/items/foo", 422, query_required),
+ ],
+)
+def test(path, expected_status, expected_response):
+ response = client.get(path)
+ assert response.status_code == expected_status
+ assert response.json() == expected_response
--- /dev/null
+import pytest
+from starlette.testclient import TestClient
+
+from query_params.tutorial006 import app
+
+client = TestClient(app)
+
+openapi_schema = {
+ "openapi": "3.0.2",
+ "info": {"title": "Fast API", "version": "0.1.0"},
+ "paths": {
+ "/items/{item_id}": {
+ "get": {
+ "responses": {
+ "200": {
+ "description": "Successful Response",
+ "content": {"application/json": {"schema": {}}},
+ },
+ "422": {
+ "description": "Validation Error",
+ "content": {
+ "application/json": {
+ "schema": {
+ "$ref": "#/components/schemas/HTTPValidationError"
+ }
+ }
+ },
+ },
+ },
+ "summary": "Read User Item Get",
+ "operationId": "read_user_item_items__item_id__get",
+ "parameters": [
+ {
+ "required": True,
+ "schema": {"title": "Item_Id", "type": "string"},
+ "name": "item_id",
+ "in": "path",
+ },
+ {
+ "required": True,
+ "schema": {"title": "Needy", "type": "string"},
+ "name": "needy",
+ "in": "query",
+ },
+ {
+ "required": False,
+ "schema": {"title": "Skip", "type": "integer", "default": 0},
+ "name": "skip",
+ "in": "query",
+ },
+ {
+ "required": False,
+ "schema": {"title": "Limit", "type": "integer"},
+ "name": "limit",
+ "in": "query",
+ },
+ ],
+ }
+ }
+ },
+ "components": {
+ "schemas": {
+ "ValidationError": {
+ "title": "ValidationError",
+ "required": ["loc", "msg", "type"],
+ "type": "object",
+ "properties": {
+ "loc": {
+ "title": "Location",
+ "type": "array",
+ "items": {"type": "string"},
+ },
+ "msg": {"title": "Message", "type": "string"},
+ "type": {"title": "Error Type", "type": "string"},
+ },
+ },
+ "HTTPValidationError": {
+ "title": "HTTPValidationError",
+ "type": "object",
+ "properties": {
+ "detail": {
+ "title": "Detail",
+ "type": "array",
+ "items": {"$ref": "#/components/schemas/ValidationError"},
+ }
+ },
+ },
+ }
+ },
+}
+
+
+query_required = {
+ "detail": [
+ {
+ "loc": ["query", "needy"],
+ "msg": "field required",
+ "type": "value_error.missing",
+ }
+ ]
+}
+
+
+@pytest.mark.parametrize(
+ "path,expected_status,expected_response",
+ [
+ ("/openapi.json", 200, openapi_schema),
+ (
+ "/items/foo?needy=very",
+ 200,
+ {"item_id": "foo", "needy": "very", "skip": 0, "limit": None},
+ ),
+ (
+ "/items/foo?skip=a&limit=b",
+ 422,
+ {
+ "detail": [
+ {
+ "loc": ["query", "needy"],
+ "msg": "field required",
+ "type": "value_error.missing",
+ },
+ {
+ "loc": ["query", "skip"],
+ "msg": "value is not a valid integer",
+ "type": "type_error.integer",
+ },
+ {
+ "loc": ["query", "limit"],
+ "msg": "value is not a valid integer",
+ "type": "type_error.integer",
+ },
+ ]
+ },
+ ),
+ ],
+)
+def test(path, expected_status, expected_response):
+ response = client.get(path)
+ assert response.status_code == expected_status
+ assert response.json() == expected_response