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Herculino Trotta
00d37d8c81
Account.displayed_exchange_currency holds the account/currency precedence for transactions, and shown_exchange_currency() expresses the same rule as a query expression for the insights and account totals, replacing the per-module checks.
14 lines
430 B
Python
14 lines
430 B
Python
from django.db.models import Case, F, When
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def shown_exchange_currency(path):
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"""Query expression for the exchange currency id at ``path`` (an account or a
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currency lookup, such as ``"account__currency__"``), or NULL when that object
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hides its exchanged amounts."""
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return Case(
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When(
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**{f"{path}show_exchanged_amounts": True},
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then=F(f"{path}exchange_currency"),
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)
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)
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