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Icon LinkSearch and Filtering

The Fuel indexer currently supports the following search and filtering operations:

  • ID selection
  • comparison
  • set membership
  • excluding null values

Additionally, you can combine these operations using the and or or keywords, and invert operations by using the not keyword.

You should practice sensible database design when filtering records. Apply database indicies to the underlying columns in order to make search operations more efficient; however, be advised that an overuse of database indicies will lead to degraded performance.

Icon LinkID Selection

You can query for a particular instance of an object by passing an ID value to with the id key. For example, let's say that you are storing blocks and you want details about a certain block, you would pass the corresponding ID: 

query {
  block(id: 4121419699470229811) {
    id
    hash
    height
    producer
  }
}
{
  "data": [
    {
      "hash": "aff5eb785f2d24ae62858fa673296e957abea518858e2f08bb47df2dbb9c8ca1",
      "height": 8209,
      "id": 4121419699470229811,
      "producer": "f65d6448a273b531ee942c133bb91a6f904c7d7f3104cdaf6b9f7f50d3518871"
    }
  ]
}

Note: Remember that IDs currently must be of type u64, and as such, the ID selection operation will only allow for a u64 value. We're open to changing this in the future.

Icon LinkExcluding Null Values

You can store null values in your records if the corresponding entity fields are configured to allow for it. You can exclude records that contain null values in a particular column or set of coulmns by using the has operator inside of a filter object. 

query {
  block(filter: { has: [producer] } ) {
    id
    hash
    height
    producer
  }
}
{
  "data": [
    {
      "hash": "d0d663e0bf499aca19d3ecb9b0b291234dc3769d2b46512016eca7244ca0ef22",
      "height": 411,
      "id": 3775485677453992400,
      "producer": "f65d6448a273b531ee942c133bb91a6f904c7d7f3104cdaf6b9f7f50d3518871"
    },
    {
      "hash": "7ff79bf3793143c557225f37b7e7d8a2b9d2e544b839d62cc367b8c5b079d478",
      "height": 412,
      "id": 3919088689958184000,
      "producer": "f65d6448a273b531ee942c133bb91a6f904c7d7f3104cdaf6b9f7f50d3518871"
    }
  ]
}

Icon LinkSet Membership

Additionally, you can exclude records in which a particular column's value does not contain any elements in a given set by using the in operator as part of a filter object. 

query {
  block(filter: { height: { in: [1, 2, 3] } } ) {
    id
    hash
    height
  }
}
{
  "data": [
    {
      "hash": "d77632f85669dd44737abf36b32f479ae518e07a9174c8571377ebb81563bb9a",
      "height": 1,
      "id": 3618468784755926500
    },
    {
      "hash": "7cb9542b624d88b3d66c6c9a1835f66fecba8892a87ffab9c17251c456ca5dcd",
      "height": 2,
      "id": 4122538829619016000
    },
    {
      "hash": "24f9611115f7ecb4a393751933a9f89329812cf08bdbe483c071b3401d06c8d6",
      "height": 3,
      "id": 3762867646901937000
    }
  ]
}

Icon LinkComparison

Finally, you can filter records by comparing the values of certain fields to a particular value of your choosing by using one of the comparison operators inside of a filter object.

Icon LinkLess, Greater, and Equals

You can do simple value comparisons using any of the following operators:

equalsequals
greater thangt
greater than or equal togte
less thanlt
less than or equal tolte

Here's an example: 

query {
  block(filter: { height: { lte: 5 } } ) {
    id
    hash
    height
    producer
  }
}
{
  "data": [
    {
      "hash": "d77632f85669dd44737abf36b32f479ae518e07a9174c8571377ebb81563bb9a",
      "height": 1,
      "id": 3618468784755926500,
      "producer": "f65d6448a273b531ee942c133bb91a6f904c7d7f3104cdaf6b9f7f50d3518871"
    },
    {
      "hash": "7cb9542b624d88b3d66c6c9a1835f66fecba8892a87ffab9c17251c456ca5dcd",
      "height": 2,
      "id": 4122538829619016000,
      "producer": "f65d6448a273b531ee942c133bb91a6f904c7d7f3104cdaf6b9f7f50d3518871"
    },
    {
      "hash": "24f9611115f7ecb4a393751933a9f89329812cf08bdbe483c071b3401d06c8d6",
      "height": 3,
      "id": 3762867646901937000,
      "producer": "f65d6448a273b531ee942c133bb91a6f904c7d7f3104cdaf6b9f7f50d3518871"
    },
    {
      "hash": "616566afdc141ecd2b60fdc56aae4f3d04b3f6db9e65a3c21d0105a08cc1b349",
      "height": 4,
      "id": 3833467323683451000,
      "producer": "f65d6448a273b531ee942c133bb91a6f904c7d7f3104cdaf6b9f7f50d3518871"
    },
    {
      "hash": "1dca838d492f29b7a3afa7755ac8741c99db992da47673cd27be86f9b0620118",
      "height": 5,
      "id": 3991987200693004000,
      "producer": "f65d6448a273b531ee942c133bb91a6f904c7d7f3104cdaf6b9f7f50d3518871"
    }
  ]
}

Icon LinkBetween

You can also filter for records that are contained in the range of two values by using the between operator. To do so, you'd set the lower bound using the min keyword and the upper bound by using max. 

query {
  block(filter: { height: { between: { min: 101, max: 103 } } } ) {
    id
    hash
    height
    producer
  }
}
{
  "data": [
    {
      "hash": "3b85fbed2d933d0334d54776612a5af72a513e875d06fa9152f6d41d0e50e417",
      "height": 101,
      "id": 3763145849079675000,
      "producer": "f65d6448a273b531ee942c133bb91a6f904c7d7f3104cdaf6b9f7f50d3518871"
    },
    {
      "hash": "deea78034c2f0fcd7ef2d2d2d203d19fcd63f1b1846fac089c51c2aa7b5c8149",
      "height": 102,
      "id": 7365137137742930000,
      "producer": "f65d6448a273b531ee942c133bb91a6f904c7d7f3104cdaf6b9f7f50d3518871"
    },
    {
      "hash": "a405d5688fdf41817868361217a09812349cc6fe0fe2bf9329fcd23e338e9444",
      "height": 103,
      "id": 7292000934927820000,
      "producer": "f65d6448a273b531ee942c133bb91a6f904c7d7f3104cdaf6b9f7f50d3518871"
    }
  ]
}

Icon LinkLogical Operators

As previously stated, you can combine or invert operations to filter for your desired results even further.

Icon LinkAnd/Or

Let's look at an example query in which we combine two filters together. 

query {
  block(filter: { 
    producer: { equals: "f65d6448a273b531ee942c133bb91a6f904c7d7f3104cdaf6b9f7f50d3518871" },
    and: { height: { lt: 4 } }
  } ) {
    id
    hash
    height
    producer
  }
}
{
  "data": [
    {
      "hash": "d77632f85669dd44737abf36b32f479ae518e07a9174c8571377ebb81563bb9a",
      "height": 1,
      "id": 3618468784755926500,
      "producer": "f65d6448a273b531ee942c133bb91a6f904c7d7f3104cdaf6b9f7f50d3518871"
    },
    {
      "hash": "7cb9542b624d88b3d66c6c9a1835f66fecba8892a87ffab9c17251c456ca5dcd",
      "height": 2,
      "id": 4122538829619016000,
      "producer": "f65d6448a273b531ee942c133bb91a6f904c7d7f3104cdaf6b9f7f50d3518871"
    },
    {
      "hash": "24f9611115f7ecb4a393751933a9f89329812cf08bdbe483c071b3401d06c8d6",
      "height": 3,
      "id": 3762867646901937000,
      "producer": "f65d6448a273b531ee942c133bb91a6f904c7d7f3104cdaf6b9f7f50d3518871"
    }
  ]
}

Icon LinkNot

You can also use the not operator in order to invert the operation of a particular filter. For example, the following query returns contracts that we've seen on the network. 

query {
  contract {
    id
  }
}
{
  "data": [
    {
      "id": "1072ca8fcab43048a5b31c1ea204748c2cb5acca6b90f3b1a02ef7a2d92386d9"
    },
    {
      "id": "9b8b258e0d64b9e8a022e3f38a751ad5a1b36e4dfdcc25a6fb8308e044250b8c"
    },
    {
      "id": "0000000000000000000000000000000000000000000000000000000000000000"
    },
    {
      "id": "8fe8ce43603c1a48274aac7532da56707901d9606a2b05de801993f48ea6bfe7"
    }
  ]
}

Let's ignore the base asset contract by inverting the in operator: 

query {
  contract(filter: {not: { id: { equals: "0000000000000000000000000000000000000000000000000000000000000000"}}}) {
    id
  }
}
{
  "data": [
    {
      "id": "1072ca8fcab43048a5b31c1ea204748c2cb5acca6b90f3b1a02ef7a2d92386d9"
    },
    {
      "id": "9b8b258e0d64b9e8a022e3f38a751ad5a1b36e4dfdcc25a6fb8308e044250b8c"
    },
    {
      "id": "8fe8ce43603c1a48274aac7532da56707901d9606a2b05de801993f48ea6bfe7"
    }
  ]
}

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