Make sure to bind extension objects as singletons.# here FlaskInjector ( app = app, modules = ) app. update ( EXT_CONFIG_VAR = 'some_value', ) # attach your views etc. from injector import Module class MyModule ( Module ): def provide_ext ( self, app : Flask ) -> ExtClass : return ExtClass ( app ) def main (): app = Flask ( _name_ ) app. Of injector.Module or a callable taking an injector.Binder instance. ) def view (): # Use ext object here.Īs we don’t have these globals with Flask-Injector we have to configure theĮxtension the Injector way - through modules. app = Flask ( _name_ ) ext = ExtClass ( app ). Typically, Flask extensions are initialized at the global scope using a See example.py for a more complete example, including Flask-SQLAlchemy andįlask-Cache integration. FlaskInjector ( app = app, modules = ) # All that remains is to run the application app. This needs to be run *after* you attached all # views, handlers, context processors and template globals. Connection ( ':memory:' ), scope = request, ) # Initialize Flask-Injector. Note that in this example we also use the # Injector to gain access to the `flask.Config`: def configure ( binder ): binder. # Accordingly, the next step is to create modules for any objects we want made # available to the application. You can see some examples of configuring # Flask extensions through modules below. as_view ( 'waz' )) # In the Injector world, all dependency configuration and initialization is # performed in modules (). add_url_rule ( '/waz/', view_func = Waz. execute ( 'SELECT * FROM users WHERE name=?', ( key ,)). db = db def dispatch_request ( self, key ): users = self. all () return render ( "foo.html" ) # Class-based view with injected constructor class Waz ( View ): def _init_ ( self, db : sqlite3. route ( "/bar" ) def bar (): return render ( "bar.html" ) # Route with injection. Need to do it in one of the modules passed to the FlaskInjector constructor):įlask.Flask is bound to the Flask application in the (scope: singleton)įlask.Config is bound to the configuration of the Flask applicationįlask.Request is bound to the current Flask request object, equivalent to the thread-localĮxample application using Flask-Injector import sqlite3 from flask import Flask, Config from flask.views import View from flask_injector import FlaskInjector from injector import inject app = Flask ( _name_ ) # Configure your application by attaching views, handlers, context processors etc. The following bindings are applied (if you want to modify them you Request object – to be used as a class decorator or in explicitĬreating an instance of FlaskInjector performs side-effectful configuration of the FlaskĪpplication passed to it. Subclass to be used for storing and reusing request-scoped dependencies Subclass – the scope to be used instead of RequestScope. – an instance of Injector to be used if, for some reason, it’s not desirableįor FlaskInjector to create a new one. The Flask-Injector public API consists of the following:įlaskInjector class with the constructor taking the following parameters:Īpp, an instance of`flask.Flask` – the Flask application to be used Provides a tutorial-level introduction to using Injector. Jinja environment globals (functions in app.jinja_env.globals)įlask-Injector supports defining types using function annotations (Python 3),Īs Flask-Injector uses Injector under the hood you should find the from flask import Blueprint, Response from dependencyinjector.wiring import inject, Provide from container import Container from controllers import ServiceController bp Blueprint ('event', name) bp.route ('/event', methods 'GET') inject def handleevent (servicecontroller: ServiceController Provide rvicecontroller. Youįlask-Injector is compatible with CPython 3.7+.Īs of version 0.15.0 it requires Injector version 0.20.0 or greater and Flaskįlask-Injector lets you inject dependencies into: Injector is a dependency-injection framework for Python, inspired by Guice. This way there’s no need to use global Flask objects, which makes testing simpler.
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