e18448e27d
https://docs.djangoproject.com/en/1.11/releases/1.10/#using-user-is-authenticated-and-user-is-anonymous-as-methods
39 lines
1.6 KiB
Python
39 lines
1.6 KiB
Python
"""
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This is the shoppingcart context_processor module.
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Currently the only context_processor detects whether request.user has a cart that should be displayed in the
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navigation. We want to do this in the context_processor to
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1) keep database accesses out of templates (this led to a transaction bug with user email changes)
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2) because navigation.html is "called" by being included in other templates, there's no "views.py" to put this.
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"""
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from .models import CourseRegCodeItem, Order, PaidCourseRegistration
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from .utils import is_shopping_cart_enabled
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def user_has_cart_context_processor(request):
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"""
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Checks if request has an authenticated user. If so, checks if request.user has a cart that should
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be displayed. Anonymous users don't.
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Adds `display_shopping_cart` to the context
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"""
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def should_display_shopping_cart():
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"""
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Returns a boolean if the user has an items in a cart whereby the shopping cart should be
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displayed to the logged in user
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"""
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return (
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# user is logged in and
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request.user.is_authenticated and
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# do we have the feature turned on
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is_shopping_cart_enabled() and
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# does the user actually have a cart (optimized query to prevent creation of a cart when not needed)
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Order.does_user_have_cart(request.user) and
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# user's cart has PaidCourseRegistrations or CourseRegCodeItem
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Order.user_cart_has_items(
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request.user,
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[PaidCourseRegistration, CourseRegCodeItem]
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)
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)
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return {'should_display_shopping_cart_func': should_display_shopping_cart}
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