[英]How to update iterable values into sqflite table in Flutter
我需要一个如何将可迭代值更新到 Flutter 中的 sqflite 表中的示例。 我创建了一个数据表并将可迭代的值插入到该表中。
Future callLogDB() async {
Iterable<CallLogEntry> cLog = await CallLog.get();
final dbHelper = DatabaseHelper.instance;
cLog.forEach((log) async {
// row to insert
Map<String, dynamic> row = {
DatabaseHelper.columnName: '${log.name}',
DatabaseHelper.columnNumber: '${log.number}',
DatabaseHelper.columnType: '${log.callType}',
DatabaseHelper.columnDate:
'${DateTime.fromMillisecondsSinceEpoch(log.timestamp)}',
DatabaseHelper.columnDuration: '${log.duration}'
};
await dbHelper.insert(row);
print('CallLog:: $row');
});
return cLog;
}
下面是插入方法:
Future<int> insert(Map<String, dynamic> row) async {
Database db = await instance.database;
return await db.insert(table, row);
}
这是更新方法:
Future<int> update(Map<String, dynamic> row) async {
Database db = await instance.database;
int id = row[columnId];
return await db.update(table, row, where: '$columnId = ?', whereArgs: [id]);
}
我想用相同的可迭代值更新这个表。 我该怎么做?
最后,我找到了这个问题的解决方案。
Future callLogDB() async {
Iterable<CallLogEntry> cLog = await CallLog.get();
final dbHelper = DatabaseHelper.instance;
cLog.toList().asMap().forEach((cLogIndex, log) async {
// row to insert
Map<String, dynamic> row = {
DatabaseHelper.columnId: cLogIndex,
DatabaseHelper.columnName: '${log.name}',
DatabaseHelper.columnNumber: '${log.number}',
DatabaseHelper.columnType: '${log.callType}',
DatabaseHelper.columnDate:
'${DateTime.fromMillisecondsSinceEpoch(log.timestamp)}',
DatabaseHelper.columnDuration: '${log.duration}'
};
await dbHelper.update(row);
print('CallLog $cLogIndex:: $row');
});
return cLog;
}
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