reactjs React useEffect警告和递归循环

0aydgbwb  于 2023-03-01  发布在  React
关注(0)|答案(1)|浏览(104)

我在下面的代码中有两个问题,我需要来自社区的输入。
1.我收到React Hook useEffect has a missing dependency: 'medicationState.eligibilityResponse'. Either include it or remove the dependency array warning警告,但当我在下面的useEffect()数组中包含medicationState.EligibilityResponse(而不是showBadge)时,组件进入递归无限循环。
1.此外,药物始终显示为合格(即showBadge设置为真),即使终点返回假。
社会人士会否就这些问题提供意见?

import React, { useEffect } from 'react';
import { GroupMed } from '../../../../state/ducks/medications/models';
import { medicationsActions } from '../../../../state/ducks/medications';
import { useDispatch, useSelector } from 'react-redux';
import { ApplicationState } from '../../../../state/ducks';
import {
    ChaseJSON,
    ExMedJSON,
    FetchEligibilityRequest,
    PrescriptionJSON,
} from '../../../../state/ducks/medications/types';
import { MedicationStatusProps } from './v2-recipes/medication-status';

export interface MedicationBadgeProps {
    index: number;
    groupMed: GroupMed;
}

const MedicationBadge: React.FC<MedicationStatusProps> = ({ index, groupMed }: MedicationBadgeProps) => {
    const dispatch = useDispatch();
    const medicationState = useSelector((state: ApplicationState) => state.medicationState);
    let showBadge = false;
    useEffect(() => {
        if (!(medicationState.EligibilityResponse && medicationState.EligibilityResponse.data)) {
            const groupMedItem = groupMed.groupMedItems[0];
            const fetchEligibilityRequest: FetchEligibilityRequest = {
                rxcui: groupMedItem.getRxcui(),
                groupMedItemType: groupMedItem.item.groupMedItemType,
                groupMedItemDrug:
                    (groupMedItem.item as ChaseJSON).drug ||
                    (groupMedItem.item as PrescriptionJSON).drug ||
                    (groupMedItem.item as ExMedJSON).externalMed.drug,
                medicationSearchResult:
                    (groupMedItem.item as ChaseJSON).searchResult ||
                    (groupMedItem.item as ExMedJSON).externalMed?.healthProfileMedication?.searchResult,
            };
            dispatch(
                medicationsActions.fetchEligibility(groupMedItem.getId(), fetchEligibilityRequest),
            );
        }
    }, [dispatch, showBadge, groupMed.groupMedItems]);
    if (medicationState.EligibilityResponse.data?.isEligible) {
        showBadge = medicationState.EligibilityResponse.data?.isEligible;
    }
    if (showBadge) {
        return (
            <ui-section flowDirection="horizontal" spacingTop="mini">
                <ui-icon imgClass="eligible" spacingRight="mini" style={{ marginLeft: '0px' }}></ui-icon>
            </ui-section>
        );
    } else {
        return <></>;
    }
};

export default MedicationBadge;
a64a0gku

a64a0gku1#

dispatchsetState这样的函数是由React本身处理的,并且是稳定的,所以你不需要将它作为dep包括在内。至于showBadge,在效果回调中看不到它的用法,所以你可能不需要它。medicationState.eligibilityResponse应该包括在内。
修改如下(假设medicationsActions是稳定动作的集合):

useEffect(() => {
  if (!medicationState.EligibilityResponse?.data) { // optional chainning using ?
    const groupMedItem = groupMed.groupMedItems[0];

    const fetchEligibilityRequest: FetchEligibilityRequest = {
      rxcui: groupMedItem.getRxcui(),
      groupMedItemType: groupMedItem.item.groupMedItemType,
      groupMedItemDrug:
        (groupMedItem.item as ChaseJSON).drug ||
        (groupMedItem.item as PrescriptionJSON).drug ||
        (groupMedItem.item as ExMedJSON).externalMed.drug,
      medicationSearchResult:
        (groupMedItem.item as ChaseJSON).searchResult ||
        (groupMedItem.item as ExMedJSON).externalMed?.healthProfileMedication
          ?.searchResult,
    };

    dispatch(
      medicationsActions.fetchEligibility(
        groupMedItem.getId(),
        fetchEligibilityRequest
      )
    );
  }
}, [groupMed.groupMedItems, medicationState.EligibilityResponse]);

如果循环不断出现,我会再次检查if条件是否正确。

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