What are some ways to prevent having to constantly check for the existence of an object within another object when working

Question

What are some ways to prevent having to constantly check for the existence of an object within another object when working

<template>
        <img :src="user.avatar_thumbnail">
        <a :href="user.profile.link"/>
    </template>
    <script>
        export default {
            data: function () {
                user: {}
            },
            mounted: function() {
                let vm = this;
                axios.get('user/profile/<id>').then((response) => {
                    vm.user = response.data.user
                });
            }
        }

    </script>

In cases where the server does not send the 'avatar_thumbnail' field in the user object, the page will not render properly.

I have been using ternary expressions to handle this scenario, but it is not applicable everywhere.

    <img :src="user.avatar_thumbnail ? user.avatar_thumbnail : '' ">

Is there a Vue.js tool available to address this issue?

Furthermore, if the server sends objects with nested fields like 'user.profile.avatar_thumbnail', I prefer not to use nested ternary expressions (please do not suggest computed methods - I would consider them if no other solution exists).

javascript vue.js vuejs2

Answer 1

Answer №1

 <img :src="user.avatar_thumbnail || '' ">

You can also visit:

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Optional_chaining

and, make sure to

  export default {
            data: function () {
                return { 
                   user: {}
               }
            },

Answer 2

 <img :src="user.avatar_thumbnail || '' ">

You can also visit:

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Optional_chaining

and, make sure to

  export default {
            data: function () {
                return { 
                   user: {}
               }
            },

Answer 3

Answer №2

If you are facing issues, there are numerous ways to troubleshoot and find solutions. However, upon reviewing your code, it appears that there are multiple errors present. You may want to consider implementing the following solution:

 <template>
  <div>
    <img :src="getThumbnail()" />
    <a :href="user.profile.link" />
  </div>
</template>
        <script>
export default {
  data: function() {
    return{
    user: {}
    }
  },
  methods: {
    getThumbnail() {
      if (this.user.avatar_thumbnail) {
        return this.user.avatar_thumbnail
      } else {
        return 'default_thumbnil'
      }
    }
  },
  mounted: function() {
    let vm = this
    axios.get('user/profile/<id>').then(response => {
      vm.user = response.data.user
    })
  }
}
</script>

Answer 4

If you are facing issues, there are numerous ways to troubleshoot and find solutions. However, upon reviewing your code, it appears that there are multiple errors present. You may want to consider implementing the following solution:

 <template>
  <div>
    <img :src="getThumbnail()" />
    <a :href="user.profile.link" />
  </div>
</template>
        <script>
export default {
  data: function() {
    return{
    user: {}
    }
  },
  methods: {
    getThumbnail() {
      if (this.user.avatar_thumbnail) {
        return this.user.avatar_thumbnail
      } else {
        return 'default_thumbnil'
      }
    }
  },
  mounted: function() {
    let vm = this
    axios.get('user/profile/<id>').then(response => {
      vm.user = response.data.user
    })
  }
}
</script>

Answer 5

Answer №3

One way to approach this is by setting a default value for the object that matches the structure of the incoming data. Here's an example:

data: function () {
  user: {
    avatar_thumbnail: '',
      profile: {
        link: ''
      }
  }
}

Another option is to create a function that returns the initial data, like this:

const initialUser = () => {
  return {
    avatar_thumbnail: '',
      profile: {
        link: ''
      }
}
}

Then you can utilize it in the data property:

data: function () {
  user: initialUser()
}

Please note: It may be sufficient to define only the properties used in the template to prevent potential errors.

Answer 6

One way to approach this is by setting a default value for the object that matches the structure of the incoming data. Here's an example:

data: function () {
  user: {
    avatar_thumbnail: '',
      profile: {
        link: ''
      }
  }
}

Another option is to create a function that returns the initial data, like this:

const initialUser = () => {
  return {
    avatar_thumbnail: '',
      profile: {
        link: ''
      }
}
}

Then you can utilize it in the data property:

data: function () {
  user: initialUser()
}

Please note: It may be sufficient to define only the properties used in the template to prevent potential errors.

What are some ways to prevent having to constantly check for the existence of an object within another object when working

Answer №1

Answer №2

Answer №3

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