I’m still a novice what loops are concerned, but I’ve come up with the following. I’m trying to find all the values for a specific name located in the title column. So I run a filter, get the values back, and now I’m trying to sum them to get a total.
I haven’t tested it, but the following code is closer to what you are looking for:
$w.onReady(function () {
$w("#dynamicDataset").setFilter(wixData.filter()
.eq("title", $w('#dropdown1').value))
.then((amount) => {
const sumTotal = 0;
let items = amount.items; // get the array of returned items
items.forEach(item => {
sumTotal += item.value; // add each value to sumTotal
});
$w("#textSum").text = "" + sumTotal; // make sumTotal a string
});
});
Keep in mind that the results that you want are returned as an array in amount. So, amount.items is the array of returned results.
In the code above, I set the variable items to the resulting array amount.items. I then loop through the array using the foreach loop.
Finally, I set #textSum to the value by adding sumTotal to an empty string (“”) which forces Javascript to convert the number sumTotal to a string.
This should give you a good enough push in the right direction to get it working in your code.
I spent some time on this the last few days, I had some initial errors which I got sorted out, but now I’m stuck on this one (and have been for three days): undefined is not an object (evaluating ‘amount.items’)
I’ve played around with all sorts of things, changing the amount column from text to number in the db, parseFloat’ing the text, replacing my dropdown1 with a static value to reference against, the list goes on…
I’ve had no luck no matter what I try, the system always gives this error. And after about 40+ articles, I’m none the wiser… Any idea what could be causing this?
The error message that you’re getting means that the query did not return any results. That is, amount.items is undefined. Maybe there are no results based on the filter. You can check to see if you’re getting results by adding a console.log(amount.items); right after the then( ) statement.
I’m running the same query to display all the results in a repeater, and this works.
Then I though, perhaps it’s running a refresh of the dropdown everytime I click the button, so I hardcoded a filter item which I know is in the database, but still no luck…
LOL, I doubt that… It’s a securely hidden page on a live financial site, so I can’t share here, but I’ll try to give some more contecxt on the page below.
I’m running the consol.log(), it still gives me this error:
TypeError: undefined is not an object (evaluating ‘amount.items’)
What I do first is to build the dropdown items from the available items in the database as they will change on a daily basis.
I then have a repeater that’s connected to #dynamicDataset and successfully filters with the script below:
export function dropdown1_change(event, $w) {
$w("#dynamicDataset").setFilter(wixData.filter()
.eq("title", $w('#dropdown1').value))
.then((results) => {
console.log("Dataset is now filtered");
$w("#table1").rows = results.items;
}).catch((err) => {
console.log(err);
});
}
Then, I want to use this same dropdown value as my filter to calculate to total for all the values that I’ve just filtered and am displaying on my table with this script:
I was trying to use the dataset like using the collection directly. Wrong, wrong, wrong.
Here’s the corrected code with comments:
export function button1_click(event, $w) {
// no need to set the filter on the database since it's still set
// how many items filtered in the dataset?
let count = $w("#dynamicDataset").getTotalCount();
// get all of the items
$w("#dynamicDataset").getItems(0, count)
.then((results) => {
let sumTotal = 0; // declare sum
let items = results.items;
items.forEach(item => {
// the amount is a string so convert
sumTotal = sumTotal + Number(item.amount);
});
$w("#textSum").text = "" + sumTotal;
}).catch((err) => {
console.log(err);
});
}
OK - so I’m embarrassed.
I made the changes in the test project you set up and saved them there as well. Give it a try.
export function button1_click(event, $w) {
// no need to set the filter on the database since it's still set
// how many items filtered in the dataset?
let count = $w("#dynamicDataset").getTotalCount();
// get all of the items
$w("#dynamicDataset").getItems(0, count)
.then((results) => {
let sumTotal = 0; // declare sum
let items = results.items;
items.forEach(item => {
// the amount is a string so convert
sumTotal = sumTotal + Number(item.amount);
});
$w("#textSum").text = "" + sumTotal;
}).catch((err) => {
console.log(err);
});
}
I send a big virtual fist bump for you guys for grinding through this!! This came through right on time for what I need. Thanks for sharing and contributing!!
