basic funcionality improvements, as well as bundle refactor prep

app/helpers/service_helper.py

@@ -1,6 +1,7 @@
 import csv
 import io
 import re
+from tokenize import String
 
 def items_csv_to_dict(items_csv_reader, solver_run):
   items = []
@@ -14,10 +15,11 @@ def items_csv_to_dict(items_csv_reader, solver_run):
       item = { 'attributes': [] }
 
       # ensure that the b param is formatted correctly
-      if len(re.findall(".", row[len(headers) - 1])) >= 3:
+      if row[len(headers) - 1] != '' and is_float(row[len(headers) - 1]):
         for key, col in enumerate(headers):
           if solver_run.irt_model.formatted_b_param() == col:
-            item['b_param'] = row[key]
+            value = float(row[key])
+            item['b_param'] = value
           elif solver_run.get_constraint(col) and solver_run.get_constraint(col).reference_attribute.type == 'bundle':
             if row[key]:
               item[solver_run.get_constraint(col).reference_attribute.id] = row[key]
@@ -81,10 +83,18 @@ def solution_items(variables, solver_run):
   form_items = []
 
   for v in variables:
-    if v.varValue is not None and v.varValue > 0:
+    if v.varValue > 0 and 'Item_' in v.name:
       item_id = v.name.replace('Item_', '')
       item = solver_run.get_item(item_id)
       # add item to list and then remove from master item list
       form_items.append(item)
 
   return form_items
+
+# probably a better place for this...
+def is_float(element: String) -> bool:
+  try:
+    float(element)
+    return True
+  except ValueError:
+    return False

app/helpers/solver_helper.py

@@ -4,7 +4,7 @@ import logging
 
 from lib.errors.item_generation_error import ItemGenerationError
 
-def build_constraints(solver_run, problem, items):
+def build_constraints(solver_run, problem, items, bundles):
   try:
     total_form_items = solver_run.total_form_items
     constraints = solver_run.constraints