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make sure remaining items added to form after bundles are added, are not part of a bundle

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Josh Burman 2021-12-17 03:42:58 +00:00
parent 9870bad1ea
commit b7ba14bd43
1 changed files with 13 additions and 0 deletions
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13
app/helpers/solver_helper.py
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@ -28,6 +28,7 @@ def build_constraints(solver_run, problem, items):
# # 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) total_bundles = randint(constraint.minimum, constraint.maximum)
selected_bundles = sample(solver_run.bundles, total_bundles) selected_bundles = sample(solver_run.bundles, total_bundles)
total_bundle_items = 0
for bundle in selected_bundles: for bundle in selected_bundles:
con = dict(zip([item.id for item in solver_run.items], con = dict(zip([item.id for item in solver_run.items],
@ -36,6 +37,18 @@ def build_constraints(solver_run, problem, items):
problem += lpSum([con[item.id] problem += lpSum([con[item.id]
* items[item.id] * items[item.id]
for item in solver_run.items]) == bundle.count, f'Bundle constraint for {bundle.type} ({bundle.id})' for item in solver_run.items]) == bundle.count, f'Bundle constraint for {bundle.type} ({bundle.id})'
total_bundle_items += bundle.count
# make sure all other items added to the form
# are not a part of any bundle
# currently only supports single bundle constrains, will need refactoring for multiple bundle constraints
con = dict(zip([item.id for item in solver_run.items],
[(getattr(item, attribute.id, None) == None)
for item in solver_run.items]))
problem += lpSum([con[item.id]
* items[item.id]
for item in solver_run.items]) == solver_run.total_form_items - total_bundle_items, f'Remaining items are not of a bundle type'
return problem return problem
except ValueError as error: except ValueError as error: