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""" |
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Extra pieces for the flask integration that aren't quite stable. |
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For the stable code for flask see lagom.integrations.flask |
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""" |
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6
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from typing import List, Type, Optional, Callable, Dict |
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8
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from flask.blueprints import Blueprint |
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from lagom.integrations.flask import FlaskIntegration |
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from lagom.interfaces import ExtendableContainer |
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class FlaskBlueprintIntegration(FlaskIntegration): |
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""" |
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Wraps a flask blueprint and a container so that dependencies are provided to |
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flask routes |
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""" |
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blueprint: Blueprint |
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_injection_map: Dict[Callable, Callable] |
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def __init__( |
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self, |
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blueprint: Blueprint, |
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container: ExtendableContainer, |
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request_singletons: Optional[List[Type]] = None, |
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): |
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""" |
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:param blueprint: The flask blueprint to provide dependency injection for |
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:param request_singletons: A list of types that should be singletons for a request |
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:param container: an existing container to provide dependencies |
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""" |
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# A blueprint is not actually a flask app but we can pretend it is for this |
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# integration. |
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# TODO: Refactor this properly when moving out of experimental |
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super().__init__(blueprint, container, request_singletons) # type: ignore |
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self.blueprint = blueprint |
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def route(self, rule, **options): |
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"""Equivalent to the flask @route decorator |
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Injectable arguments should be set by making the default value |
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lagom.injectable |
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""" |
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46
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def _decorator(f): |
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endpoint = options.pop("endpoint", f.__name__) |
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if f not in self._injection_map: |
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self._injection_map[f] = self._container.partial( |
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50
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f, shared=self._request_singletons |
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) |
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self.blueprint.add_url_rule( |
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rule, endpoint, self._injection_map[f], **options |
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) |
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return f |
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return _decorator |
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View Code Duplication |
def magic_route(self, rule, **options): |
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60
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"""Equivalent to the flask @route decorator |
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61
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The injection container will try and bind all arguments |
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""" |
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63
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64
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def _decorator(f): |
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endpoint = options.pop("endpoint", f.__name__) |
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if f not in self._injection_map: |
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self._injection_map[f] = self._container.magic_partial( |
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f, shared=self._request_singletons |
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) |
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self.blueprint.add_url_rule( |
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rule, endpoint, self._injection_map[f], **options |
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) |
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return f |
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return _decorator |
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meadsteve /
lagom
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