Filter nested array of objects based on a property value

Question

HI All I am new to JavaScript, I am having nested array of objects my aim is to filter out the object whose role array consists of value like "_admin" '' can be any thing. My data looks like this

[
    {
        name:'tom',
        process:'flipkart',
        master:'pharma',
        profiles: [
            {
                level:'begginer',
                language:'hindi',
                role:['flp_admin','flp_teacher']
            }
        ]
    
    
    },
    {
        name:'jeo',
        process:'amazon',
        master:'science',
        profiles: [
            {
                level:'begginer',
                language:'english',
                role:['amz_admin']
            }
        ]
    
    
    },
    {
        name:'jerry',
        process:'email',
        master:'it',
        profiles: [
            {
                level:'begginer',
                language:'urdu',
                role:['eml_teacher']
            }
        ]
    
    }
]

could any one please tell me how can I filter the objects

Pranav Rustagi · Accepted Answer · 2020-10-20 08:38:41Z

2

codepen

const data = [
   {
      name: "tom",
      process: "flipkart",
      master: "pharma",
      profiles: [
         {
            level: "begginer",
            language: "hindi",
            role: ["flp_admin", "flp_teacher"]
         }
      ]
   },
   {
      name: "jeo",
      process: "amazon",
      master: "science",
      profiles: [
         {
            level: "begginer",
            language: "english",
            role: ["amz_admin"]
         }
      ]
   },
   {
      name: "jerry",
      process: "email",
      master: "it",
      profiles: [
         {
            level: "begginer",
            language: "urdu",
            role: ["eml_teacher"]
         }
      ]
   }
];

const filterData = data.filter(({ profiles }) => {
   return profiles.filter(({ role }) => {
      return role.some(str => str.includes('_admin'))
   }).length
})

console.log(filterData)

edited Oct 20, 2020 at 8:38

Pranav Rustagi

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answered Oct 20, 2020 at 8:36

dodobird

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Comments

Astor · Accepted Answer · 2020-10-20 08:38:15Z

1

If you don't want to use any library (like lodash) this could be one approach:

myArray.filter(item => item.profiles.some(p => /_admin/i.test(p.role)))

It will return an array with objects for names 'tom' and 'jeo'.

item.profiles.some(p => /_admin/i.test(p.role)) indicates if there is any profile containing '_admin' for one object (item).
myArray.filter will return all objects (items) that match with previous .some condition to true.

edited Oct 20, 2020 at 8:38

answered Oct 20, 2020 at 8:32

Astor

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Comments

Md Sabbir Alam · Accepted Answer · 2020-10-20 08:40:01Z

1

Here is a one-liner for you,

data.filter(item => item.profiles.some((profile)=> profile.role.some((roleItem) => roleItem.includes('_admin'))))

Here data is your array.

Let me just break it up for you,

data.filter((item) => {
    const itemHasRoleAdmin = item.profiles.some((profile) => {
       const profileHasRoleAdmin = profile.role.some((roleItem) => {
           if(roleItem.includes('_admin')) return true;
           else return false;
       });

       if(profileHasRoleAdmin) return true;
       else return false
    });

    if(itemHasRoleAdmin) return true;
    else return false;
});

For more reading on Array.prototype.some method and Array.prototype.filter method.

answered Oct 20, 2020 at 8:40

Md Sabbir Alam

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Comments

vincent · Accepted Answer · 2021-01-17 05:49:41Z

Here is another solution using object-scan. It's powerful once you wrap your head around how to use it. I'm a big fan of using libraries when they make the code more readable and easier to maintain (e.g. for changed requirements)

// const objectScan = require('object-scan');

const filter = (data) => objectScan(['[*].profiles[*].role'], {
  filterFn: ({ parents, value, context }) => {
    if (value.some((role) => role.endsWith('_admin'))) {
      context.push(parents[parents.length - 2]);
      return true;
    }
    return false;
  }
})(data, []);

const data = [{ name: 'tom', process: 'flipkart', master: 'pharma', profiles: [{ level: 'begginer', language: 'hindi', role: ['flp_admin', 'flp_teacher'] }] }, { name: 'jeo', process: 'amazon', master: 'science', profiles: [{ level: 'begginer', language: 'english', role: ['amz_admin'] }] }, { name: 'jerry', process: 'email', master: 'it', profiles: [{ level: 'begginer', language: 'urdu', role: ['eml_teacher'] }] }];

console.log(filter(data));
// => [ { name: 'jeo', process: 'amazon', master: 'science', profiles: [ { level: 'begginer', language: 'english', role: [ 'amz_admin' ] } ] }, { name: 'tom', process: 'flipkart', master: 'pharma', profiles: [ { level: 'begginer', language: 'hindi', role: [ 'flp_admin', 'flp_teacher' ] } ] } ]

.as-console-wrapper {max-height: 100% !important; top: 0}

<script src="https://bundle.run/[email protected]"></script>

Disclaimer: I'm the author of object-scan

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