Comparing an item-access var (e.g. state.dict["k"] >= 90) raises ObjectItemOperation error in 0.9.x

[masonse]

Describe the bug

In Reflex 0.9.x, comparing a var that originated from a dictionary or list item-access against a Python literal raises an ObjectItemOperation error at render time. The same expression worked in 0.8.x.

The bug surfaces specifically inside rx.cond and other places where a var needs to be evaluated as a boolean.

To Reproduce

import reflex as rx

class State(rx.State):
    metrics: dict[str, int] = {"current": 75, "limit": 100}

def index() -> rx.Component:
    return rx.cond(
        State.metrics["current"] >= 90,
        rx.text("Above threshold"),
        rx.text("Below threshold"),
    )

app = rx.App()
app.add_page(index)

Running reflex run raises:

TypeError: '>=' not supported between instances of 'ObjectItemOperation' and 'int'

Expected behavior

The comparison should evaluate against the resolved value, returning False in this case (75 < 90), and render the second branch.

Workaround

Compute the comparison in the state and expose a derived var:

class State(rx.State):
    metrics: dict[str, int] = {"current": 75, "limit": 100}

    @rx.var
    def is_above_threshold(self) -> bool:
        return self.metrics["current"] >= 90

This works but is awkward for ad-hoc per-render checks.

Specifications

• Reflex version: 0.9.3
• Python version: 3.12
• OS: macOS

Additional context

Possibly related to closed issues #4380 (ObjectVar __getitem__ typing issues), #5849 (make indexing more null friendly), and #4647 (recursive datatypes checking) but the comparison failure mode persists in 0.9.3.

[linear-code]

ENG-9615