Question

我是 flutter 的初学者，并尝试在我的应用程序上创建 CRUD 方法，但是在我调用插入方法（addItems）时创建数据库后，有 DatabaseException（没有这样的表：values11（代码 1）：这让我感到困惑，我阅读了所有过去的问题并尝试了所有问题，但我现在没有工作，

还有路径：/data/user/0/com.example.mana_app/app_flutter/mana_appp.db，是吗？？

未来的 init() 异步 {

    Directory directory = await getApplicationDocumentsDirectory();
    final path = join(directory.path, "mana_appp.db");
    print('paath is here: $path');
    return await openDatabase(
        path,
        version: 6,
        onCreate: (Database db4, int version) async {

          await db4.execute(
              "CREATE TABLE IF NOT EXISTS VALUE_TABLE11 ("
          "id INTEGER PRIMARY KEY"
          "chicken_no INTEGER NOT NULL,"
          "insured_chick INTEGER NOT NULL,"
          "rise_durate_m TEXT NOT NULL,"
          "death_10days INTEGER NOT NULL,"
          "death_21days INTEGER NOT NULL,"
          "death_35days INTEGER NOT NULL,"
          "death_after_35d INTEGER NOT NULL,"
          "chick_weight REAL NOT NULL,"
          "convert_coficient REAL NOT NULL,"
          "cnsume_dan REAL NOT NULL,"
          "rise_dur_da REAL,)"
          );
          },
        );

}

}

Future<int> addItem(model_values costs) async {
  final Database db3 = await init();
  await db3.insert(VALUE_TABLE11, costs.tomap(),
      conflictAlgorithm: ConflictAlgorithm.replace
  );
}

类模型值{

int id;
int chicken_no;
int insured_chick;
double rise_durate_m;
int death_10days;
int death_21days;
int death_35days;
int death_after_35d;
double chick_weight;
double convert_coficient;
double cnsume_dan;
double rise_dur_da;




model_values({this.id, this.chicken_no ,this.insured_chick,this.rise_durate_m,
  this.death_10days,this.death_21days,this.death_35days,this.death_after_35d,
  this.chick_weight,this.convert_coficient,this.cnsume_dan,this.rise_dur_da,})

}}

数据库异常（没有这样的表：values11（代码 1）：

0 个答案: