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Average rating of product variants #3

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merged 2 commits into from
Feb 6, 2024
Merged

Average rating of product variants #3

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0234ba1
Average rating of product variants
legendofa Feb 6, 2024
e56dae7
Merge branch 'main' into average-rating-of-product-variants
legendofa Feb 6, 2024
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16 changes: 15 additions & 1 deletion src/product_variant.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -13,7 +13,7 @@ use crate::{
review_connection::ReviewConnection,
};

#[derive(Debug, Serialize, Deserialize, Hash, Eq, PartialEq, Copy, Clone, SimpleObject)]
#[derive(Debug, Serialize, Deserialize, PartialEq, Copy, Clone, SimpleObject)]
#[graphql(complex)]
pub struct ProductVariant {
/// UUID of the product variant.
Expand Down Expand Up @@ -58,6 +58,20 @@ impl ProductVariant {
Err(_) => return Err(Error::new("Retrieving reviews failed in MongoDB.")),
}
}

/// Retrieves average rating of product variant.
async fn average_rating<'a>(
&self,
ctx: &Context<'a>,
) -> Result<f32> {
let review_connection = self.reviews(&ctx, None, None, None).await?;
let reviews = review_connection.nodes;
let accumulated_reviews =
reviews.iter().fold(0, |prev_r, r| prev_r + r.rating as i32) as f32;
let total_count = review_connection.total_count as f32;
let average_rating = accumulated_reviews / total_count;
Ok(average_rating)
}
}

impl PartialOrd for ProductVariant {
Expand Down
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