add simple_app.py

Author: copdips

Makefile

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+SHELL=/bin/bash
+API_FOLDER=app
+VENV_NAME := $(shell [ -d venv ] && echo venv || echo .venv)
+VENV_DIR=${VENV_NAME}
+PYTHON=$(shell if [ -d $(VENV_DIR) ]; then echo $(VENV_DIR)/bin/python; else echo python; fi)
+
+ifneq (,$(findstring xterm,${TERM}))
+	BOLD	:= $(shell tput -Txterm bold)
+	RED	:= $(shell tput -Txterm setaf 1)
+	GREEN	:= $(shell tput -Txterm setaf 2)
+	YELLOW	:= $(shell tput -Txterm setaf 3)
+	NORMAL	:= $(shell tput -Txterm sgr0)
+endif
+
+install:
+	$(PYTHON) -m pip install -U pip
+	$(PYTHON) -m pip install -U -r requirements.txt
+
+run_simple_app:
+	uvicorn simple_app:app --reload
+
+run:
+	uvicorn main:app --reload

README.md

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+# FastAPI with GraphQL
+
+- <https://fastapi.tiangolo.com/how-to/graphql/>
+- <https://strawberry.rocks/docs/integrations/fastapi>
+- <https://www.geeksforgeeks.org/fastapi-using-graphql/>
+
+## Test simple_app.py
+
+1. run: `make run_simple_app`
+1. open requests file: `test_simple_app.http`

requirements.txt

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+fastapi[uvicorn]
+strawberry-graphql

simple_app.py

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+import strawberry
+from fastapi import FastAPI
+from strawberry.asgi import GraphQL
+from strawberry.fastapi import GraphQLRouter
+
+
+@strawberry.type
+class User:
+    name: str
+    age: int
+
+
+@strawberry.type
+class Query:
+    @strawberry.field
+    def user(self) -> User:
+        return User(name="Patrick", age=100)
+
+
+schema = strawberry.Schema(query=Query)
+
+app = FastAPI()
+
+"""
+old version from fastapi:
+https://fastapi.tiangolo.com/how-to/graphql/
+graphql_app = GraphQL(schema)
+app.add_route("/graphql", graphql_app)
+app.add_websocket_route("/graphql", graphql_app)
+"""
+
+# latest version from strawberry:
+# https://strawberry.rocks/docs/integrations/fastapi
+graphql_app = GraphQLRouter(schema)
+app.include_router(graphql_app, prefix="/graphql")

test_simple_app.http

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+### only age field
+curl -X POST http://127.0.0.1:8000/graphql -H "Content-Type: application/json" -d '{
+  "query": "{ user { age } }"
+}'
+
+### both age and name field
+
+curl -X POST http://127.0.0.1:8000/graphql -H "Content-Type: application/json" -d '{
+  "query": "{ user { age name} }"
+}'
+
+
+### graphql syntax
+# https://notes.dt.in.th/20220907T163410Z4258
+POST http://127.0.0.1:8000/graphql
+Content-Type: application/json
+X-REQUEST-TYPE: GraphQL
+
+query  {
+  user { age name}
+}