How to filter data array based on user input (array as well) in Vue

Question

everybody. I have data coming to Vue app from WP back-end via WP-API. They are gathered in object 'Bookers'. I have some fields to display in each item (booker). For example Paying Systems: Visa, Mastercard, Bitcoin Cash, etc. (They are stored in bookers.acf.pay_systems) And I want to have an opportunity to filter "Bookers" items based on user input. User choose "Visa" and "Mastercard" - and I want to leave only items bookers which have Paying Systems: Visa and Mastercard. Ordinary behavior. So I have check-boxes set to take user input:

 Visa\
 Mastercard\

I have data:

data: {
   bookers: [], //data coming from WP-API
   paysysValues: [], // array to store user input
   visaCheck: false, mastercardCheck: false, appleCheck: false, googleCheck: false,bitcoinCheck: 
   false,kievstarCheck: false, privat24Check: false, // to catch user input event, if all are false filters are clear and we display original data
}

Displaying data:

 {{booker}} \

And I have computed property to display filtered/unfiltered data:

computed: {        
    filteredBookers: function () {
        //find all checked paying systems and pass them to paysysValues array
        var paysysChecks = document.querySelectorAll('.paysys-check');
        for (var i = 0; i < paysysChecks.length; i++) {
          if (paysysChecks[i].checked) {
             this.paysysValues.push(paysysChecks[i].value);                            
          }
        }
        // checking user input event to update calculated property via reactive behavior                    
        if ( !this.visaCheck & !this.mastercardCheck & !this.appleCheck & !this.googleCheck & !this.bitcoinCheck & !this.kievstarCheck & !this.privat24Check) {
           return this.bookers
           } else {
         // and here I'm trying to compare user input array (paysysValues) with paying systems set 
         // for each booker and filter data only if we have intersection                        
              return this.bookers.filter(function (item) {
              return item.acf.pay_systems.filter(x => this.paysysValues.includes(x));
           })
         }
     }
},

And if I use to filter condition some particular value, for example item.acf.pay_systems.filter[0] == 'Visa' everything work well. But then I try to use intersection of two array it doesn't work. So, guys, please tell me what am I doing wrong

userqiK91 · Answer

Vue offers more cleaner ways to organise such a functionality with no for loops, querySelectors and that complicated data and computed prop.

Nikola Pavicevic · Answer

If I understood you correctly try like following snippet:

new Vue({
  el: '#demo',
  data() {
    return {
      bookers: [{acf: {pay_systems: ['visaCheck', 'googleCheck'],}}, {acf: {pay_systems: ['visaCheck'],}}, {acf: {pay_systems: ['bitcoinCheck', 'kievstarCheck'],}}, {acf: {pay_systems: ['appleCheck', 'bitcoinCheck'],}}], 
      values: [{name: 'visaCheck', state: false}, {name: 'mastercardCheck', state: false}, {name:  'appleCheck', state: false}, {name: 'googleCheck', state: false}, {name: 'bitcoinCheck', state: 
 false}, {name: 'kievstarCheck', state: false}, {name: 'privat24Check', state: false}]
    }
  },
  computed: {        
    filteredBookers() {    
      let chosen = this.values.filter(v => v.state).map(c => c.name)
      if (this.values.every(v => !v.state)) {
        return this.bookers
      } else {     
        return this.bookers.filter((item) => {
          return item.acf.pay_systems.some(x => chosen.includes(x));
      })
    }
  }
},
})



  
    
      
      {{ item.name }}
    
  
  
    {{ booker }}

How to filter data array based on user input (array as well) in Vue

2 Answers