1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
|
from contextlib import asynccontextmanager
from typing import List, Optional
import databases
import ormar
import sqlalchemy
import uvicorn
from fastapi import FastAPI
DATABASE_URL = "sqlite:///test.db"
ormar_base_config = ormar.OrmarConfig(
database=databases.Database(DATABASE_URL), metadata=sqlalchemy.MetaData()
)
@asynccontextmanager
async def lifespan(app: FastAPI):
database_ = app.state.database
if not database_.is_connected:
await database_.connect()
yield
database_ = app.state.database
if database_.is_connected:
await database_.disconnect()
app = FastAPI(lifespan=lifespan)
metadata = sqlalchemy.MetaData()
database = databases.Database("sqlite:///test.db")
app.state.database = database
class Category(ormar.Model):
ormar_config = ormar_base_config.copy(tablename="categories")
id: int = ormar.Integer(primary_key=True)
name: str = ormar.String(max_length=100)
class Item(ormar.Model):
ormar_config = ormar_base_config.copy(tablename="items")
id: int = ormar.Integer(primary_key=True)
name: str = ormar.String(max_length=100)
category: Optional[Category] = ormar.ForeignKey(Category, nullable=True)
@app.get("/items/", response_model=List[Item])
async def get_items():
items = await Item.objects.select_related("category").all()
return items
@app.post("/items/", response_model=Item)
async def create_item(item: Item):
await item.save()
return item
@app.post("/categories/", response_model=Category)
async def create_category(category: Category):
await category.save()
return category
@app.put("/items/{item_id}")
async def get_item(item_id: int, item: Item):
item_db = await Item.objects.get(pk=item_id)
return await item_db.update(**item.model_dump())
@app.delete("/items/{item_id}")
async def delete_item(item_id: int, item: Item = None):
if item:
return {"deleted_rows": await item.delete()}
item_db = await Item.objects.get(pk=item_id)
return {"deleted_rows": await item_db.delete()}
if __name__ == "__main__":
# to play with API run the script and visit http://127.0.0.1:8000/docs
uvicorn.run(app, host="127.0.0.1", port=8000)
|
