22 lines
792 B
ReStructuredText
22 lines
792 B
ReStructuredText
Subclassing Flask
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=================
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The :class:`~flask.Flask` class is designed for subclassing.
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One reason to subclass would be customizing the Jinja2 :class:`~jinja2.Environment`. For example, to add a new global template variable::
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from flask import Flask
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from datetime import datetime
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class MyFlask(Flask):
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""" Flask with more global template vars """
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def create_jinja_environment(self):
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""" Initialize my custom Jinja environment. """
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jinja_env = super(MyFlask, self).create_jinja_environment(self)
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jinja_env.globals.update(
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current_time = datetime.datetime.now()
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)
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return jinja_env
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This is the recommended approach for overriding or augmenting Flask's internal functionality.
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