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testing a theory on constraint issues

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This commit is contained in:
Josh Burman
2021-12-17 22:00:38 +00:00
parent ae8f303269
commit da5e06cb59
1 changed files with 11 additions and 7 deletions
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18
app/services/loft_service.py
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@ -63,6 +63,9 @@ class LoftService(Base):
# create problem # create problem
problem = LpProblem("ata-form-generate", LpMinimize) problem = LpProblem("ata-form-generate", LpMinimize)
problem += lpSum([items[item.id]
for item in self.solver_run.items])
# constraints # constraints
problem += lpSum([items[item.id] problem += lpSum([items[item.id]
for item in self.solver_run.items]) == self.solver_run.total_form_items, 'Total form items' for item in self.solver_run.items]) == self.solver_run.total_form_items, 'Total form items'
@ -72,21 +75,22 @@ class LoftService(Base):
# multi-objective functions and constraints # multi-objective functions and constraints
for target in self.solver_run.objective_function.tif_targets: for target in self.solver_run.objective_function.tif_targets:
tif = lpSum([item.iif(self.solver_run, target.theta)*items[item.id] # tif = lpSum([item.iif(self.solver_run, target.theta)*items[item.id]
for item in self.solver_run.items]) # for item in self.solver_run.items])
problem += lpSum([item.iif(self.solver_run, target.theta)*items[item.id] problem += lpSum([item.iif(self.solver_run, target.theta)*items[item.id]
for item in self.solver_run.items]) <= target.value, f'min tif theta ({target.theta}) target value {target.value}' for item in self.solver_run.items]) <= target.value, f'min tif theta ({target.theta}) target value {target.value}'
problem_objection_functions.append(tif) # problem_objection_functions.append(tif)
for target in self.solver_run.objective_function.tcc_targets: for target in self.solver_run.objective_function.tcc_targets:
tcc = lpSum([item.irf(self.solver_run, target.theta)*items[item.id] # tcc = lpSum([item.irf(self.solver_run, target.theta)*items[item.id]
for item in self.solver_run.items]) # for item in self.solver_run.items])
problem += lpSum([item.irf(self.solver_run, target.theta)*items[item.id] problem += lpSum([item.irf(self.solver_run, target.theta)*items[item.id]
for item in self.solver_run.items]) <= target.value, f'min tcc theta ({target.theta}) target value {target.value}' for item in self.solver_run.items]) <= target.value, f'min tcc theta ({target.theta}) target value {target.value}'
problem_objection_functions.append(tcc) # problem_objection_functions.append(tcc)
# solve problem # solve problem
problem.sequentialSolve(problem_objection_functions) # problem.sequentialSolve(problem_objection_functions)
problem.solve()
# add return items and create as a form # add return items and create as a form
form_items = service_helper.solution_items(problem.variables(), self.solver_run) form_items = service_helper.solution_items(problem.variables(), self.solver_run)