Check Json If Has Nested Object

How can I check if subproducts object exists in my JSON? 'products':[ { 'id':5002, 'description':'i dont know', 'position':1, 'weight':1, 'subproducts':{

Solution 1:

I think you should try this:

products[0].hasOwnProperty('subproducts')

Solution 2:

It appears that when you say subproducts doesn't exist, it does actually exist as an object, but with no properties. An object with no properties is still considered truthy in JavaScript, so that's why it always passes your truthy condition, and then throws the undefined error if you try to access the name property.

Example:

var obj = {};
console.log(obj ? true : false); // true

In this case you can test for the name existing:

$.each(company.products, function (j, product) {
    if(product.hasOwnProperty('subproducts') {
       if(product.subproducts.name){
           // it has subproducts AND the subproduct.name exists
       }     
    } else {
      // do this
    }
}

Solution 3:

Your best bet would be to go through the object and check for an object:

functionhasSubObject(products) {
    for(var key in products){
        if(!products.hasOwnProperty(key))continue;
        if(typeof products[key] === "object") returntrue;
    }
    returnfalse;
}

Which is gross and will probably slow down if you have large objects