React Reducer - 将元素添加到现有元素
React Reducer - Add elements to existing element
我希望新的更新被连续添加到“看板”,而不是旧值被签署。 enter image description here
动作函数
export const editExpense = (id, updates) => ({
type: "EDIT_EXPENSE",
id,
updates
});
减速器功能
case "EDIT_EXPENSE":
return state.map((expense) => {
if (expense.id === action.id) {
return {
...expense,
kanbanboard:[{...action.updates}]
};
} else {
return expense;
};
});
感谢您的帮助。
我看不到整个减速器,但看起来您正在明确覆盖旧值。将其更改为:
case "EDIT_EXPENSE":
return state.map((expense) => {
if (expense.id === action.id) {
return {
...expense,
kanbanboard:[
...expense.kanbanboard, // you have to add your old state here
{
...action.updates
}]
};
} else {
return expense;
};
});
我希望新的更新被连续添加到“看板”,而不是旧值被签署。 enter image description here
动作函数
export const editExpense = (id, updates) => ({
type: "EDIT_EXPENSE",
id,
updates
});
减速器功能
case "EDIT_EXPENSE":
return state.map((expense) => {
if (expense.id === action.id) {
return {
...expense,
kanbanboard:[{...action.updates}]
};
} else {
return expense;
};
});
感谢您的帮助。
我看不到整个减速器,但看起来您正在明确覆盖旧值。将其更改为:
case "EDIT_EXPENSE":
return state.map((expense) => {
if (expense.id === action.id) {
return {
...expense,
kanbanboard:[
...expense.kanbanboard, // you have to add your old state here
{
...action.updates
}]
};
} else {
return expense;
};
});