Flutter 向数据库sqflite中插入数据

Question

我需要一次 insert data 并将其添加到 string 的末尾，但发生的事情是我正在做的事情是覆盖data

 for (var i = 0; i< isChecked.length; i++) {
  receipt.ingredientsReceipt = isChecked[i]; //receipt is table name, ingredientsReceipt is column name
  print(isChecked[i]);// isChecked is my list containing [ING 1, ING 2, ING 3]
 }

输出：

I/flutter ( 5360): ING 1
I/flutter ( 5360): ING 2
I/flutter ( 5360): ING 3

这是我的 SQL:

CREATE TABLE receipt(id INTEGER PRIMARY KEY AUTOINCREMENT, nameReceipt TEXT, descReceipt TEXT, ingredientsReceipt TEXT)

输出SQL：

{id: null, nameReceipt: TEST, descReceipt: TEST, ingredientsReceipt: ING 3}

我需要这样：

{id: 1, nameReceipt: TEST, descReceipt: TEST, ingredientsReceipt: ING 1, ING 2, ING 3}

Answer 1

根据我的评论，使用 3 个表：

收据

id	nameReceipt	descReceipt
1	name1	desc1
2	name2	desc2

成分

id	name
1	ingr1
2	ingr2
3	ingr3
4	ingr4

RECEIPT_INGREDIENT

id	receipt_fk	ingredient_fk
1	1	1
2	1	2
3	1	3
4	2	3
5	2	4

所以当你想获得收据时，你必须对收据中的 select 数据编写查询，加入 receipt_ingredient （其中 receipt.id = receipt_ingredient.receipt_fk), 加入配料 (其中 receipt_ingredient.ingredeint_fk = ingredient.id).

Ex. 获取收据 id = 1 =>

id	nameReceipt	descReceipt	receipt_fk	ingredient_fk	name
1	name1	desc1	1	1	ingr1
1	name1	desc1	1	2	ingr2
1	name1	desc1	1	3	ingr3

Flutter 向数据库sqflite中插入数据

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