Operands #

Filters in Koncorde are constituted of terms and operands. In this section, you will find an exhaustive listing of all the available operands. Operands allow you to combine multiple terms together in the same filter. You can also refer to the terms reference to know about all the available terms.

Note that the ability to combine multiple terms together allows to create different filters that have equivalent scope. Such filters are optimized by Koncorde, thus internally represented by the same ID.

and #

The and filter takes an array of filter objects, combining them with AND operands.

Given the following documents: #

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{
  firstName: 'Grace',
  lastName: 'Hopper',
  city: 'NYC',
  hobby: 'computer'
},
{
  firstName: 'Ada',
  lastName: 'Lovelace',
  city: 'London',
  hobby: 'computer'
}

The following filter validates the first document: #

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{
  and: [
    {
      equals: {
        city: 'NYC'
      }
    },
    {
      equals: {
        hobby: 'computer'
      }
    }
  ];
}

bool #

Returns documents matching a combination of filters.

This operand accepts the following attributes:

must all listed conditions must be true
must_not all listed conditions must be false
should one of the listed condition must be true
should_not one of the listed condition must be false

Each one of these attributes are an array of filter objects.

Given the following documents: #

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{
  firstName: 'Grace',
  lastName: 'Hopper',
  age: 85,
  city: 'NYC',
  hobby: 'computer'
},
{
  firstName: 'Ada',
  lastName: 'Lovelace',
  age: 36
  city: 'London',
  hobby: 'computer'
},
{
  firstName: 'Marie',
  lastName: 'Curie',
  age: 55,
  city: 'Paris',
  hobby: 'radium'
}

The following filter validates the second document: #

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{
  bool: {
    must : [
      {
        in : {
          firstName : ['Grace', 'Ada']
        }
      },
      {
        range: {
          age: {
            gte: 36,
            lt: 85
          }
        }
      }
    ],
    'must_not' : [
      {
        equals: {
          city: 'NYC'
        }
      }
    ],
    should : [
      {
        equals : {
          hobby : 'computer'
        }
      },
      {
        exists : {
          field : 'lastName'
        }
      }
    ]
  }
}

not #

The not filter omits the matching data.

Given the following documents: #

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{
  firstName: 'Grace',
  lastName: 'Hopper',
  city: 'NYC',
  hobby: 'computer'
},
{
  firstName: 'Ada',
  lastName: 'Lovelace',
  city: 'London',
  hobby: 'computer'
}

The following filter validates the first document: #

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{
  not: {
    equals: {
      city: 'London';
    }
  }
}

or #

The or filter takes an array containing filter objects, combining them using OR operands.

Given the following documents: #

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{
  firstName: 'Grace',
  lastName: 'Hopper',
  city: 'NYC',
  hobby: 'computer'
},
{
  firstName: 'Ada',
  lastName: 'Lovelace',
  city: 'London',
  hobby: 'computer'
},
{
  firstName: 'Marie',
  lastName: 'Curie',
  city: 'Paris',
  hobby: 'radium'
}

The following filter validates the first two documents: #

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{
  or: [
    {
      equals: {
        city: 'NYC'
      }
    },
    {
      equals: {
        city: 'London'
      }
    }
  ];
}

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