我在工作正常的组件中添加,编辑,更新和删除数组元素。
问题是我无法对父组件执行相同的处理,因为我需要将该数组数据传递给父组件。
数组在子组件中有项目(也将该项目发送到父组件数组)
更新(也更新实际一项,但也更新父组件数组中的相似对象)
删除也一样。
在子组件中执行所有这些操作时,我无法更新父阵列。
我想在我的父组件中更新数组。 下面是代码。
子组件:
// child component saving element in an array
saveLeadPlanDialog = () => {
const {updateMode, lead_id, year, probability, plan2, plan3, fee, addcosts} = this.state;
// here i am setting that data in child component
this.setState(state => ({
lead_plans: [...state.lead_plans, {
id: Date.now(),
year: year,
probability: probability,
plan2: plan2,
plan3: plan3,
fee: fee,
addcosts: addcosts
}]
}));
// here i am sending that data to parent component.
this.props.plansClick({
id: Date.now(),
year: year,
probability: probability,
plan2: plan2,
plan3: plan3,
fee: fee,
addcosts: addcosts
}
);
}
// here i am doing delete process in child component
handleRemoveFields = () => {
const {updateMode, lead_plan_row} = this.state;
this.setState(prevState => ({lead_plans: prevState.lead_plans.filter(lead_offer_rec => lead_offer_rec !== lead_plan_row)}));
};
// updating in child component
const {lead_id, lead_plans, year, probability, plan2, plan3, fee} = this.state;
const new_lead = {
id: lead_id,
year,
probability,
plan2,
plan3,
fee,
};
const updated_lead_plans = lead_plans.map((lead) => lead.id === lead_id ? new_lead : lead);
this.setState({
lead_plans: updated_lead_plans,
year: '',
probability: '',
plan2: '',
plan3: '',
fee: '',
addcosts: '',
newFieldsEditMode: false,
LeadPlanSaveUpdateDialogOpen: false
});
父组件:
// parent component method.
handlePlansClick = (planData) => {
// this is parent componet, here i need to do update, delete the array object which got updation and deletion in child component
// it alwaya adds item right now.
this.setState(state => ({
lead_plans: [...state.lead_plans, planData]
}));
}
我也需要在父组件中执行所有这些过程。
有没有更好的方法来处理这种情况?
我如何也可以在父组件中获取更新,编辑,删除的项和操作?
因此,子级和父级在数组中都显示相同的数组组件数据。
您应该在此处应用单一的真理原则。仅在父级中更新数据(使用传递给子级的回调(如您当前所做的那样)),然后将结果作为道具传递给子级。这样,数据将始终在两个组件中同步。