Mongo DB - $inc allowed for numbers only - mongodb

Question

I'm trying to create my first Meteor App and I'm stuck on what should be a simple process. Here are the inserts that I used to first set up the DB;
income.insert({income_acct_name: "Account 1", income_acct_budget: 0, income_acct_total: 0});
income.insert({income_acct_name: "Account 2", income_acct_budget: 0, income_acct_total: 0});
income.insert({income_acct_name: "Account 3", income_acct_budget: 0, income_acct_total: 0});
here is template;
<template name="income">
{{#each accounts}}
<tr>
<td class="row1"><input type="text" value="{{income_acct_name}}"></td>
<td class="row2"><input type="text" value="{{income_acct_budget}}"></td>
<td class="row3">0%</td>
<td class="row4"><input type="text" value="0" id="income_amt_entered"></td>
<td class="row5">$ </td>
<td class="row6"> - </td>
<td class="row7"></td>
</tr>
{{/each}}
</template>
and this is the helper that throws the error;
Template.income.events ({
'change td.row4': function(theEvent, theTemplate) {
var rowId = this._id;
Session.set('changedRow', rowId);
var changedRow = Session.get('changedRow');
var amount = theTemplate.find('#income_amt_entered').value;
income.update (
{"_id": changedRow},
{$inc: {"income_acct_total": amount}}
)
//console.log(amount);
}
});
So in my form I enter an amount like 45.50 in row4 to update "income_acct_total" and I get that error. I'm using pretty much the same code from the Leader Board app that is working. The amount entered appears correctly in the console log.

Answer 1

Try to get number from '#income_amt_entered' input :
var amount = parseFloat(theTemplate.find('#income_amt_entered').value);