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The disablePrefixOnAttributes parameter turns off prefix matching for the specified attributes. This is useful when you want to ensure only full-word matches are allowed—for example, in attributes like SKUs, phone numbers, or serial codes—where partial matches could produce irrelevant results. For more information, see Prefix searching by attribute.

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Usage

  • Attribute names are case-sensitive.
  • To disable prefix matching for an attribute, ensure it’s listed as a separate entry in searchableAttributes. Attributes with equal priority (grouped together as a single entry) can’t be targeted by disablePrefixOnAttributes. For example: 
    [
  'sku',
  'barcode,serial_number,buzz' 
]
There’s no hard limit on the number of attributes you can include, but adding too many can slow down getSettings operations and degrade performance in the Algolia dashboard.

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Example

Current API clients

var response = await client.SetSettingsAsync(
  "ALGOLIA_INDEX_NAME",
  new IndexSettings { DisablePrefixOnAttributes = new List<string> { "serial_number" } }
);

IndexSettings settings = new IndexSettings();
settings.DisablePrefixOnAttributes = new List
{
  "sku"
};

index.SetSettings(settings);