The sum of a numeric attribute

sum Method

The method used to get the summation in a model attribute. A find criteria can be used to filter before finding an average.

the attribute must be of type number

Usage

const sum = await Cart.sum("price");

// Do something with sum.

The above method sums the price attribute of the model cart.

const sum = await Cart.sum("price", { category: "groceries" });

// Do something with sum.

The above method sums the price attribute of the model cart where category of the products is groceries.

Please refer to the find methods for the operators that can be implemented in the criteria.