Filtering Variables based on ForEach

[aputhuraya]

I am trying to render the target_table_row dynamically for each property_target_table, which in turn, renders for each value in the available_properties variable (see towards the end for definition of this part)

The problem is in rendering the python variable called budget_value (not a Reflex Var)
The statement which sets it's value:

TargetWizardState.budgets[property_id][metric_id]

returns an error:

Error loading ASGI app factory: Unsupported Operand type(s) for []: ObjectCastedVar, ObjectItemOperation

For context, below is how TargetWizardState.budgets is defined:

class TargetWizardState(AuthState):
    
    # Budget data from database
    budgets: Dict[int, Dict[int, float]] = {}

I am setting the value for this State variable already using a DB call.

My goal is simple:

For each of the rendered target_table_row, show the budget_value that corresponds to the property_id and metric_id coming into the target_table_row function

The problematic code:

def target_table_row(property_id: int, metric_id: int, row_index: int):
    """
    Renders a single row in the target table.
    Uses real budget data from TargetWizardState.get_budget_value()
    """
    
    # Get real budget and PY values from state
    budget_value = TargetWizardState.budgets[property_id][metric_id]
    
    return rx.el.tr(
        
        # 2025 Budget
        rx.el.td(
            budget_value,
            class_name="p-3 text-right text-gray-600 text-sm font-medium"
        ),
    )


def property_target_table(property_dict: dict):
    """
    Renders a complete target table for one property.
    Shows all selected metrics with budget/PY values and target inputs.
    """
    property_id = property_dict['id']
    
    return rx.el.table(
        # Table Header
        rx.el.thead(
            rx.el.tr(
                rx.el.th(
                    "2025 Budget", 
                    class_name="text-right p-3 text-sm font-semibold text-gray-700"
                ),
                class_name="bg-gray-50 border-b border-gray-200"
            )
        ),
        
        # Table Body
        rx.el.tbody(
            rx.foreach(
                TargetWizardState.selected_metrics,
                lambda metric_id, idx: target_table_row(property_id, metric_id, idx)
            )
        ),
        
        class_name="w-full"
    )


def target_tables_container():
    """
    Container that renders target tables for all selected properties.
    Only renders tables for properties in the selected list.
    """
    return rx.el.div(
        rx.foreach(
            TargetWizardState.available_properties,
            lambda prop: rx.cond(
                TargetWizardState.selected_properties.contains(prop['id']),
                property_target_table(prop)
            )
        ),
        class_name="space-y-6"
    )

Any help is much appreciated!
Thanks.