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Added support for dependency injection #88

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Added support for dependency injection #88

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15 changes: 10 additions & 5 deletions flask_classy.py
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Original file line number Diff line number Diff line change
Expand Up @@ -52,7 +52,7 @@ class FlaskView(object):

@classmethod
def register(cls, app, route_base=None, subdomain=None, route_prefix=None,
trailing_slash=None):
trailing_slash=None, instance=None):
"""Registers a FlaskView class for use with a specific instance of a
Flask app. Any methods not prefixes with an underscore are candidates
to be routed and will have routes registered when this method is
Expand All @@ -70,6 +70,8 @@ def register(cls, app, route_base=None, subdomain=None, route_prefix=None,
:param route_prefix: A prefix to be applied to all routes registered
for this class. Precedes route_base. Overrides
the class' route_prefix if it has been set.

:param instance: a previous instance of the class
"""

if cls is FlaskView:
Expand Down Expand Up @@ -98,7 +100,7 @@ def register(cls, app, route_base=None, subdomain=None, route_prefix=None,
special_methods = ["get", "put", "patch", "post", "delete", "index"]

for name, value in members:
proxy = cls.make_proxy_method(name)
proxy = cls.make_proxy_method(name, instance)
route_name = cls.build_route_name(name)
try:
if hasattr(value, "_rule_cache") and name in value._rule_cache:
Expand Down Expand Up @@ -163,15 +165,18 @@ def parse_options(cls, options):


@classmethod
def make_proxy_method(cls, name):
def make_proxy_method(cls, name, instance=None):
"""Creates a proxy function that can be used by Flasks routing. The
proxy instantiates the FlaskView subclass and calls the appropriate
method.

:param name: the name of the method to create a proxy for
:param instance: a previous instance of the class
"""

i = cls()
if instance is None:
i = cls()
else:
i = instance
view = getattr(i, name)

if cls.decorators:
Expand Down