How to break sea-orm query using multiline statement

Question

I am a beginner here using sea-orm. I am trying to break down query for filtering my data. params are input from http query parameters. Based on value of params i want to filter data.

let test = ProductEntity::find();

if params.get("price_gt").is_some() {
    test.filter(product_entity::Column::Price.eq(20));
}

dbg!(test.all(&db).await?);

Help meIssue