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1
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from contextlib import contextmanager |
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2
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from typing import Iterator |
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3
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4
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from fastapi import FastAPI, Request |
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5
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6
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from lagom import Container, dependency_definition |
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7
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from lagom.integrations.fast_api import FastApiIntegration |
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8
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9
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10
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class Inner: |
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11
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def __init__(self, msg=None): |
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12
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self.msg = msg |
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13
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14
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15
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class RequestInjectedSingleton: |
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16
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def __init__(self, request: Request) -> None: |
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17
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self.request = request |
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18
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19
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20
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class Outer: |
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21
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def __init__(self, inner: Inner): |
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22
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self.inner = inner |
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23
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24
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25
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class ContextLoaded: |
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26
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cleaned_up = False |
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27
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28
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def __str__(self): |
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29
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return f"{self.cleaned_up}" |
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30
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31
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32
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class UnusedDepOne: |
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33
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pass |
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34
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35
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36
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class UnusedDepTwo: |
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37
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pass |
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38
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39
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40
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app = FastAPI() |
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41
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container = Container() |
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42
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deps = FastApiIntegration( |
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43
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container, |
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44
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request_singletons=[UnusedDepOne, Inner, RequestInjectedSingleton, UnusedDepTwo], |
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45
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request_context_singletons=[ContextLoaded], |
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46
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) |
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47
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48
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49
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@dependency_definition(container) |
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50
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@contextmanager |
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51
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def _load_then_clean() -> Iterator[ContextLoaded]: |
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52
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try: |
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53
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yield ContextLoaded() |
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54
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finally: |
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55
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ContextLoaded.cleaned_up = True |
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56
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57
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58
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@app.get("/") |
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59
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async def read_main(outer_one=deps.depends(Outer), outer_two=deps.depends(Outer)): |
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60
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return {"outer_one": hash(outer_one.inner), "outer_two": hash(outer_two.inner)} |
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61
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62
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63
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@app.get("/inner") |
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64
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async def another_route(dep_one=deps.depends(Inner)): |
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65
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return {"data": dep_one.msg} |
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66
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67
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68
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@app.get("/request_injected_request_singleton") |
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69
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async def request_injected_request_singleton( |
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70
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dep_one=deps.depends(RequestInjectedSingleton), |
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71
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): |
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72
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return {"data": dep_one.request.url.path} |
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73
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74
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75
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@app.get("/with_some_context") |
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76
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async def a_route_with_context(dep_one=deps.depends(ContextLoaded)): |
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77
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return {"cleaned_up": str(dep_one)} |
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78
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meadsteve /
lagom
