How to concatenate two objects by omitting null values ​​using lodash

I've researched how to merge two JavaScript objects by omitting null values, so far I've tried to use merge, assign, clone with no success.

Here is my test ( JSFiddle ):

let defaultValues = {code: '', price: 0, description: ''}
let product = {code: 'MyCode', price: null, description: 'Product Description'}

//Merge two objects
let merged = _.merge({}, defaultValues, product)
console.log(merged)

//My result
{code: 'MyCode', price: null, description: 'Product Description'}

//My expected result
{code: 'MyCode', price: 0, description: 'Product Description'}

      

        
        
        
      

    

I am using VueJS framework, when I have these null properties on some inputs (with a v-shaped model) I get an exception.

Thank!