想要在 SEMBAST 数据库中的对象列表中插入新项目,
对象 JSON 格式:
{
"id": "1",
"name": "Apple",
"isSweet": true,
"leaves": [
{
"id": "1",
"name": "leaveOne"
},
{
"id": "2",
"name": "leaveTwo"
},
]
}
想插入请假三,“id”:3,“姓名”:请假三,也想更新请假名称,如何添加新请假,更改请假名称?
这是水果和离开模型:
class Fruit {
final String id;
final String name;
final bool isSweet;
final List<Leaves> leaves;
Fruit({this.id, this.name, this.isSweet, this.leaves});
Map<String, dynamic> toMap() {
return {
'id': id,
'name': name,
'isSweet': isSweet,
'leaves': leaves.map((leave) => leave.toMap()).toList(growable: false)
};
}
static Fruit fromMap(Map<String, dynamic> map) {
return Fruit(
id: map['id'],
name: map['name'],
isSweet: map['isSweet'],
leaves: map['leaves'].map((mapping) => Leaves.fromMap(mapping)).toList().cast<Leaves>(),
);
}
}
class Leaves {
final String id;
final String name;
Leaves({this.id, this.name});
Map<String, dynamic> toMap() {
return {
'id': id,
'name': name,
};
}
static Leaves fromMap(Map<String, dynamic> map) {
return Leaves(
id: map['id'],
name: map['name'],
);
}
}
如何插入新休假和更新休假?