Exploring the process of searching for an id within an array of objects received through axios in Vue 2

Question

Exploring the process of searching for an id within an array of objects received through axios in Vue 2

I am currently working on verifying whether the user is included in the list that I retrieve using axios. However, I am facing an issue where the FILTER option I have used consistently returns undefined or [], even when the user does exist in the array.

At this point, I am at a loss for what else to try. I have tried validating by checking the data returned with console.log() but haven't been able to make progress.

    created() {
        this.getStagesDefault()
        this.getSalesman()
        this.getStagesAmountByUser()
    },
    methods: {
        async getSalesman(){
            const { data } = await axios.get('salesman')
            this.employees = data.data
        },
        getStagesAmountByUser(){
            console.log(this.user['id'])
            var objectUser = this.employees.filter(elem => {
                return elem.id === this.user['id']
            })

            console.log(objectUser)
        },

Console

Vue data

javascript vue.js vuejs2

Answer 1

Answer №1

One key point to note is that the method getSalesman operates asynchronously, implying that getStagesAmountByUser will commence executing before getSalesman completes.

To address this issue, there are two possible solutions:

Utilize the await keyword with the getSalesman method, but ensure that the containing method (in this case created) is also marked as async. Modify the code as shown below:

async created() {
    this.getStagesDefault()
    await this.getSalesman()
    this.getStagesAmountByUser()
}

Implement a .then callback after the getSalesman function call, and trigger the subsequent action inside this callback. Adjust the code as follows:

created() {
    this.getStagesDefault()
    this.getSalesman().then(() => this.getStagesAmountByUser())
}

Answer 2

One key point to note is that the method getSalesman operates asynchronously, implying that getStagesAmountByUser will commence executing before getSalesman completes.

To address this issue, there are two possible solutions:

Utilize the await keyword with the getSalesman method, but ensure that the containing method (in this case created) is also marked as async. Modify the code as shown below:

async created() {
    this.getStagesDefault()
    await this.getSalesman()
    this.getStagesAmountByUser()
}

Implement a .then callback after the getSalesman function call, and trigger the subsequent action inside this callback. Adjust the code as follows:

created() {
    this.getStagesDefault()
    this.getSalesman().then(() => this.getStagesAmountByUser())
}

Answer 3

Answer №2

fetchSalesperson is a function that returns data asynchronously. When the filter is applied, the array being filtered is still empty.

this.fetchSalesperson()            // this operation occurs later
this.calculateTotalSales()  // this operation occurs immediately

To ensure that the functions are executed sequentially by waiting for the asynchronous method to complete:

await this.fetchSalesperson()
this.calculateTotalSales()

Answer 4

fetchSalesperson is a function that returns data asynchronously. When the filter is applied, the array being filtered is still empty.

this.fetchSalesperson()            // this operation occurs later
this.calculateTotalSales()  // this operation occurs immediately

To ensure that the functions are executed sequentially by waiting for the asynchronous method to complete:

await this.fetchSalesperson()
this.calculateTotalSales()

Answer 5

Answer №3

To optimize performance, it is recommended to pass the id to the backend for selecting data instead of filtering on the clientside.

Remember that the 'created' method is only called once unless the component is destroyed, so be mindful of updating your method when the user.id changes.

Always wrap asynchronous code in a try/catch block to handle errors gracefully, ensuring a smooth user experience even when a user or salesman is not found. You can also customize error messages instead of relying on console.error.

{
  data: () => ({
    employee: {}
  }),
  watch: {
    'user.id' (v) {
      if (v) this.getEmployee()
    }
  },
  created() {
    this.getEmployee()
  },
  methods: {
    getEmployee() {
      if (typeof this.user.id === 'undefined') return

      try {
        const {
          data
        } = await axios.get(`salesman/${this.user.id}`)

        this.employee = data.data
      } catch (e) {
        console.error(e)
      }
    }
  }
}

Answer 6

To optimize performance, it is recommended to pass the id to the backend for selecting data instead of filtering on the clientside.

Remember that the 'created' method is only called once unless the component is destroyed, so be mindful of updating your method when the user.id changes.

Always wrap asynchronous code in a try/catch block to handle errors gracefully, ensuring a smooth user experience even when a user or salesman is not found. You can also customize error messages instead of relying on console.error.

{
  data: () => ({
    employee: {}
  }),
  watch: {
    'user.id' (v) {
      if (v) this.getEmployee()
    }
  },
  created() {
    this.getEmployee()
  },
  methods: {
    getEmployee() {
      if (typeof this.user.id === 'undefined') return

      try {
        const {
          data
        } = await axios.get(`salesman/${this.user.id}`)

        this.employee = data.data
      } catch (e) {
        console.error(e)
      }
    }
  }
}

Exploring the process of searching for an id within an array of objects received through axios in Vue 2

Answer №1

Answer №2

Answer №3

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