CODEWITHSUNDEEP
flutter
Daniyal Habib
Daniyal Habib

Reputation: 1

package:flutter/src/widgets/basic.dart': Failed assertion: line 2297 pos 15: 'heightFactor == null || heightFactor >= 0.0': is not true

  @override
  Widget build(BuildContext context) {
    return Card(
      elevation: 6,
      margin: EdgeInsets.all(20),
      child: Padding(
        padding: EdgeInsets.all(10),
        child: Row(
          mainAxisAlignment: MainAxisAlignment.spaceAround,
          children: groupedTransactionValues.map((data) {
            return Flexible(
              fit: FlexFit.tight,
              child: ChartBar(
                data['day'],
                data['amount'],
                (data['amount'] as double) / totalSpending,
              ),
            );
          }).toList(),
        ),
      ),
    );
  }
}

Upvotes: 0

Views: 3320

Answers (3)

Seng Yong Tan
Seng Yong Tan

Reputation: 31

This is actually because of you are trying to divide it with 0.So,just change the line of

(data['amount'] as double) / totalSpending

to this

totalSpending == 0 ? 0 : (data["amount"] as double) / totalSpending

If you have the problem says that "A RenderFlex overflowed by 36 pixels on the bottom."

Just change this:

child: Container(
    height: 30,
    child: Row(
        children: groupedTransactionValues.map((data) {
      return ChartBar(
          data['day'],
          data['amount'],
          totalSpending == 0.0
              ? 0.0
              : (data['amount'] as double) / totalSpending);
    }).toList()),
  )

to this:

child: Container(
    height: 100,
    child: Row(
        children: groupedTransactionValues.map((data) {
      return ChartBar(
          data['day'],
          data['amount'],
          totalSpending == 0.0
              ? 0.0
              : (data['amount'] as double) / totalSpending);
    }).toList()),
  )

Thats all, hope you can solve your problem!

Upvotes: 3

schmikes
schmikes

Reputation: 121

Change this:

(data['amount'] as double) / totalSpending

to this:

totalSpending == 0 ? 0 : (data["amount"] as double) / totalSpending

This error occurs when your transaction list is empty. If your transaction list is empty dart evaluates that expression as 0 / 0 which is NaN. When you pass this NaN to the ChartBar heightFactor: spendingPctOfTotal it throws that error because heightFactor is expecting a value bigger then 0 or null (NaN is different from null).

Upvotes: 12

SwiftiSwift
SwiftiSwift

Reputation: 8757

I am also taking that course and came to the same issue.

You need to pass the recent transactions into the chart like this:

List<Transaction> get _recentTransactions {
    return _transactions.where((tx) => DateTime.now().difference(tx.date).inDays <= 7).toList();
}

and then use this in your build:

Chart(transactions: _recentTransactions);

Upvotes: 0

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