Redux状态正在更新,而无需调度任何操作

时间:2018-07-10 09:11:57

标签: reactjs redux react-redux

我首先要说这不是this question, which happened to have the same title的重复。

我只是从customers内的props方法中获取componentDidMount数组对象,像这样;

  componentDidMount() {
      const { customers } = this.props
      const expiringCustomers = getExpiringCustomers(customers)
      console.log('Expiring customers ', expiringCustomers)
  }

在另一个文件中,我有一个getExpiringCustomers函数,该函数可以接收通过的客户,并假定要返回一个新修改的客户列表;

function numbersOnly(value) {
    if(_.isString(value)) {
        value = Number(value.replace(/[^\d]/g, ''))
    }

    return value
}

function normalizeNumber(collection, field) {
    return collection.map(obj => {
        obj[field] = numbersOnly(obj[field])
        return obj
    })
}


export function getExpiringCustomers(customers) {
    const expiringCustomers = customers.filter(customer => {
        const daysLeft = Number(new Date(customer.endDate)) - _.now()
        if(daysLeft <= (dateInMonth * 3)) {
            return customer
        }
    })

    return normalizeNumber(expiringCustomers, 'rent')
}

我将我的react组件连接到redux状态; <​​/ p>

const mapStateToProps = state => ({
    customers: state.customers.filter(customer => customer && !customer.deleted)
})

export default connect(mapStateToProps)(Accounting)

问题

功能运行并记录结果后,客户状态将在redux存储中更改。

这很令人困惑,因为customers_edit动作必须通过某些过程,但是没有一个过程被调用/记录。

受影响对象的快照:

Ps。 数据只是样板。

//- Focus on rent property

const customers = [
...,
{
      id: 'o91wukyfsq36qidkld02a0voo93rna5w',
      cardId: 'GD-1101010111',
      id_type: 'Driving License',
      firstName: 'Maalim',
      lastName: 'Guruguja',
      names: 'Maalim Guruguja',
      property: '5iaprurefg3v3uhad688mypo9kqf6xk3',
      rent: '250,000',
      email: 'tonimarikapi@yahoo.com',
      phone: '239-288-3838-38',
      noticePeriod: '3',
      status: '2 months remain',
      startDate: '2018-07-09',
      endDate: '2018-08-17',
      createdAt: 1530623480772,
      updatedAt: 1531213159147
    },
    ...
]

//- After the functions run, log and edit customers array
const customers = [
...,
{
      id: 'o91wukyfsq36qidkld02a0voo93rna5w',
      cardId: 'GD-1101010111',
      id_type: 'Driving License',
      firstName: 'Maalim',
      lastName: 'Guruguja',
      names: 'Maalim Guruguja',
      property: '5iaprurefg3v3uhad688mypo9kqf6xk3',
      rent: 250000,
      email: 'tonimarikapi@yahoo.com',
      phone: '239-288-3838-38',
      noticePeriod: '3',
      status: '2 months remain',
      startDate: '2018-07-09',
      endDate: '2018-08-17',
      createdAt: 1530623480772,
      updatedAt: 1531213159147
    },
    ...
]

从链接的问题(可能重复一个问题)中,回答的人说这是可能导致此问题的某些突变问题。我不确定这是否适用于假定为只读的道具。

如何阻止这些功能更新我的redux存储,请帮忙。

2 个答案:

答案 0 :(得分:4)

您对normalizeNumber中的对象进行了突变,因为您使用的所有数组方法都不会克隆该数组的对象。

更改normalizeNumber回调以返回具有更新字段的新对象:

function normalizeNumber(collection, field) {
    return collection.map(obj => ({
        ...obj,
        [field]: numbersOnly(obj[field])
    }))
}

答案 1 :(得分:0)

您似乎无意中修改了customers数组。

尝试:

componentDidMount() {
      const { customers } = { ...this.props };
      const expiringCustomers = getExpiringCustomers(customers)
      console.log('Expiring customers ', expiringCustomers)
  }