Using Vuetify to filter items in a v-data-table upon clicking a button

Question

Using Vuetify to filter items in a v-data-table upon clicking a button

My table structure is similar to this, https://i.sstatic.net/56TUi.png I am looking to implement a functionality where clicking on the Filter Button will filter out all items that are both male and valid with a value of true.

users = [
    { name: 'ali', male: true, valid: true },
    { name: 'kevin', male: true, valid: false },
    { name: 'meri', male: false, valid: false }
  ]
  get headerst() {
    return [
      {
        text: 'user',
        align: 'start',

        value: 'name'
      },
      {
        text: 'male',
        value: 'male'
      },
      {
        text: 'valid',
        value: 'valid'
      }
    ]
  }
  filterOnlyCapsText(value, search, item) {
    return (
      value != null &&  typeof value === 'boolean' && value===true
    )
  }
  filter(){
  // i dont know
  }

<script src="https://cdn.jsdelivr.net/npm/<a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="14626171607d726d54263a6c">[email protected]</a>/dist/vuetify.js"></script>

<script src="https://cdnjs.cloudflare.com/ajax/libs/vue/2.5.17/vue.js"></script>
<v-btn @click="filter">filter</v-btn>
    <v-data-table
     
      :headers="headerst"
      :items="users"
      item-key="name"
      class="elevation-1"
      :custom-filter="filterOnlyCapsText"
    >
 
 
    </v-data-table>

I have attempted writing code for this but it is not functioning properly.

Any suggestions on how to fix this issue?

This additional text serves no particular purpose other than avoiding stack errors. this text is nothing just to avoid stack error this text is nothing just to avoid stack error this text is nothing just to avoid stack error this text is nothing just to avoid stack error

typescript vue.js nuxt.js vuetify.js

Answer 1

Answer №1

If you want to achieve this, make sure to modify your filter method to return the following:

return value != null &&
        search != null &&
        typeof value === 'string' &&
        value.toString().toLowerCase().indexOf(search.toLowerCase()) !== -1 && 
        item.male === true && 
        item.valid === true;

This code snippet indicates that from the item, you can access the male and valid properties for comparison. Additionally, the line

value.toString().toLowerCase().indexOf(search.toLowerCase()) !== -1

ensures a match between searched text and value.

To implement a button for filtering only male and valid users, create a computed property named filteredUsers with the following structure:

filteredUsers(){
      if(this.onlyValidAndMale){
        return this.users.filter(user => user.male == true && user.valid == true)
      }
      
      return this.users;
    },

Note the presence of the onlyValidAndMale property here, which should be defined in the data() section.

Once set up, use filteredUsers as a source for :items in your table.

Create a button that toggles the onlyValidAndMale property between true and false on click. Here's an example implementation:

 <v-btn @click="onlyValidAndMale = !onlyValidAndMale">Click here to filter only those that are male and valid.</v-btn>

You can find a complete working example here.

HTML FILE:

<div id="app">
  <v-app id="inspire">
    <div>
      <v-data-table
        :headers="headers"
        :items="filteredUsers"
        item-key="name"
        class="elevation-1"
        :search="search"
        :custom-filter="filterOnlyMaleAndValid"
      >
        <template v-slot:top>
          <v-text-field
            v-model="search"
            label="Search (Will match only male = true and valid = true)"
            class="mx-4"
          ></v-text-field>
        </template>
      </v-data-table>
    </div>
        <v-btn @click="onlyValidAndMale = !onlyValidAndMale">Click here to filter only those that are male and valid.</v-btn>
  </v-app>
</div>

JS FILE:

new Vue({
  el: '#app',
  vuetify: new Vuetify(),
  data () {
    return {
      search: '',
      onlyValidAndMale: false,
      users: [
    { name: 'ali', male: true, valid: true },
    { name: 'muhamed', male: true, valid: true },
    { name: 'sami', male: true, valid: true },
    { name: 'kevin', male: true, valid: false },
    { name: 'meri', male: false, valid: false }
  ],
    }
  },
  computed: {
    filteredUsers(){
      if(this.onlyValidAndMale){
        return this.users.filter(user => user.male == true && user.valid == true)
      }
      
      return this.users;
    },
    headers () {
      return [
      {
        text: 'user',
        align: 'start',

        value: 'name'
      },
      {
        text: 'male',
        value: 'male'
      },
      {
        text: 'valid',
        value: 'valid'
      }
    ]
    },
  },
  methods: {
    filterOnlyMaleAndValid (value, search, item) {
      return value != null &&
        search != null &&
        typeof value === 'string' &&
        value.toString().toLowerCase().indexOf(search.toLowerCase()) !== -1 && 
        item.male === true && 
        item.valid === true;
    },
  },
})

I also improved the name of the filter method for better clarity, but its functionality remains unchanged.

Answer 2

If you want to achieve this, make sure to modify your filter method to return the following:

return value != null &&
        search != null &&
        typeof value === 'string' &&
        value.toString().toLowerCase().indexOf(search.toLowerCase()) !== -1 && 
        item.male === true && 
        item.valid === true;

This code snippet indicates that from the item, you can access the male and valid properties for comparison. Additionally, the line

value.toString().toLowerCase().indexOf(search.toLowerCase()) !== -1

ensures a match between searched text and value.

To implement a button for filtering only male and valid users, create a computed property named filteredUsers with the following structure:

filteredUsers(){
      if(this.onlyValidAndMale){
        return this.users.filter(user => user.male == true && user.valid == true)
      }
      
      return this.users;
    },

Note the presence of the onlyValidAndMale property here, which should be defined in the data() section.

Once set up, use filteredUsers as a source for :items in your table.

Create a button that toggles the onlyValidAndMale property between true and false on click. Here's an example implementation:

 <v-btn @click="onlyValidAndMale = !onlyValidAndMale">Click here to filter only those that are male and valid.</v-btn>

You can find a complete working example here.

HTML FILE:

<div id="app">
  <v-app id="inspire">
    <div>
      <v-data-table
        :headers="headers"
        :items="filteredUsers"
        item-key="name"
        class="elevation-1"
        :search="search"
        :custom-filter="filterOnlyMaleAndValid"
      >
        <template v-slot:top>
          <v-text-field
            v-model="search"
            label="Search (Will match only male = true and valid = true)"
            class="mx-4"
          ></v-text-field>
        </template>
      </v-data-table>
    </div>
        <v-btn @click="onlyValidAndMale = !onlyValidAndMale">Click here to filter only those that are male and valid.</v-btn>
  </v-app>
</div>

JS FILE:

new Vue({
  el: '#app',
  vuetify: new Vuetify(),
  data () {
    return {
      search: '',
      onlyValidAndMale: false,
      users: [
    { name: 'ali', male: true, valid: true },
    { name: 'muhamed', male: true, valid: true },
    { name: 'sami', male: true, valid: true },
    { name: 'kevin', male: true, valid: false },
    { name: 'meri', male: false, valid: false }
  ],
    }
  },
  computed: {
    filteredUsers(){
      if(this.onlyValidAndMale){
        return this.users.filter(user => user.male == true && user.valid == true)
      }
      
      return this.users;
    },
    headers () {
      return [
      {
        text: 'user',
        align: 'start',

        value: 'name'
      },
      {
        text: 'male',
        value: 'male'
      },
      {
        text: 'valid',
        value: 'valid'
      }
    ]
    },
  },
  methods: {
    filterOnlyMaleAndValid (value, search, item) {
      return value != null &&
        search != null &&
        typeof value === 'string' &&
        value.toString().toLowerCase().indexOf(search.toLowerCase()) !== -1 && 
        item.male === true && 
        item.valid === true;
    },
  },
})

I also improved the name of the filter method for better clarity, but its functionality remains unchanged.

Using Vuetify to filter items in a v-data-table upon clicking a button

Answer №1

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