Conditional parameters are not shown appropriately

[nabenabe0928]

Description

In the trial table, parameters are not shown correctly and they will be shown in the json format when the search space has (a) conditional parameter(s).

How to Reproduce

Run the following:

import optuna


def objective(trial):
    category = trial.suggest_categorical("category", ["foo", "bar"])
    if category == "foo":
        return (trial.suggest_float("x1", 0, 10) - 2) ** 2
    else:
        return -((trial.suggest_float("x2", -10, 0) + 5) ** 2)


study = optuna.create_study(storage="sqlite:///test.db")
study.optimize(objective, n_trials=100)

And then check on the dashboard:

$ optuna-dashboard sqlite:///test.db

Python version

3.9

Optuna version

3.5.0

optuna-dashboard version or git revision

0.14.0

Web browser

Google Chrome

[adjeiv]

https://github.com/optuna/optuna-dashboard/blob/main/optuna_dashboard/ts/components/TrialTable.tsx#L94

Seems to be due to this condition, which is probably evaluating to false in the case of the conditional parameters. Did you have in mind to take the union of all set parameters, have a column for each, and for each trial to use the value if it exists? I only wonder whether the initial design was to prevent lots of blank column values.

[github-actions]

This issue has not seen any recent activity.

[nabenabe0928]

This issue has been addressed by #740 .