My Cloud firestore has TimeStamp data, I am fetching it and displaying it in a datatable widget. To covert it to desired date format, I Used DateFormat('yMd').Format(). But format() only accepts datetime and not timestamp. So, to convert firebase timestamp data to date time I used TimeStamp().toDate(). but TimeStamp() accepts seconds and nanoseconds. I tried providing firebase timestamp data in this format data['paidDate'] I get error, How do I fix this.

 return Center(
                            child: Container(
                          child: DataTable(
                              columns: const [
                                DataColumn(label: Text('Ammount')),
                                DataColumn(label: Text('Paid Date'))
                              ],
                              rows: snapshot.data!.docs.map((data) {
                                // DateTime datee = data['paidDate'];
                                return DataRow(cells: [
                                  DataCell(Text(data['amount'])),
                                  DataCell(Text(DateFormat('yMd')
                                      .format(Timestamp(data['paidDate']).toDate())))
                                ]);
                              }).toList()),
                        ));

CodePudding user response：

You need to write a converter function. Here is a example

///timestamp to date
  static DateTime _dateTimeFromTimeStamp(Timestamp timestamp) => DateTime.parse(timestamp.toDate().toString());

CodePudding user response：

Firstly you need to convert the timestamp to DateTime and then you go to format the desired format date

DateTime date = DateTime.fromMillisecondsSinceEpoch(data['paidDate'] * 1000);
String formattedDate = DateFormat('yMd').format(date);

CodePudding user response：

var docs = Firebase.instance.doc(<id>).get();
Map<String, dynamic> data = docs.data!() as Map<String, dynamic>;
DateTime time = (data['timestamp'] as TimeStamp ).toDate();

Now time is of type DateTime. Pass it to .format()