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better bundle constraint

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This commit is contained in:
Josh Burman
2021-12-17 02:25:03 +00:00
parent 95aad63db6
commit 9870bad1ea
1 changed files with 7 additions and 3 deletions
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10
app/helpers/solver_helper.py
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@ -25,13 +25,17 @@ def build_constraints(solver_run, problem, items):
* items[item.id]
for item in solver_run.items]) <= round(total_form_items * (max / 100)), f'{attribute.id} - {attribute.value} - max'
elif attribute.type == 'bundle':
# TODO: account for many different bundle types, since the id condition in L33 could yield duplicates
# # TODO: account for many different bundle types, since the id condition in L33 could yield duplicates
total_bundles = randint(constraint.minimum, constraint.maximum)
selected_bundles = sample(solver_run.bundles, total_bundles)
for bundle in selected_bundles:
problem += lpSum([items[item.id] for item in solver_run.items if getattr(item, bundle.type, None) == bundle.id]) == bundle.count, f'Bundle constraint for {bundle.type} ({bundle.id})'
con = dict(zip([item.id for item in solver_run.items],
[(getattr(item, bundle.type, False) == bundle.id)
for item in solver_run.items]))
problem += lpSum([con[item.id]
* items[item.id]
for item in solver_run.items]) == bundle.count, f'Bundle constraint for {bundle.type} ({bundle.id})'
return problem
except ValueError as error: