Using Out of the Box Computed Fields

Using Out of the Box Computed Fields

This is for:

Developer System Administrator

In addition to the computed fields already used by default in the Coveo Search Provider configuration file, Coveo also provides a few ones that you can use optionally.

Coveo.SearchProvider.ComputedFields.ImageUrlComputedField

This computed field retrieves the URL of an image referenced by a field of type Image. For example, you could have an item that has a field named “screenshot” of type Image, and that refers to an image in the Media Library.

To create a new field containing the URL of the image, add the following element in your configuration and rebuild your search indexes:

<field fieldName="screenshoturl" sourceField="screenshot">Coveo.SearchProvider.ComputedFields.ImageUrlComputedField, Coveo.SearchProviderBase</field>

Coveo.SearchProvider.ComputedFields.ImageAltComputedField

This computed field retrieves the alternate text (ALT) of an image referenced by a field of type Image. Given the same scenario as ImageUrlComputedField, add the following element in your configuration and rebuild your search indexes to create a new field containing the alternate text of the image:

<field fieldName="screenshotalturl" sourceField="screenshot">Coveo.SearchProvider.ComputedFields.ImageAltComputedField, Coveo.SearchProviderBase</field>

Coveo.SearchProvider.ComputedFields.ReferencedFieldComputedField

This computed field retrieves a specific field from an item referenced by a field. For example, you could have an item that has a MediaItem field of type Droptree, which refers to a File item containing a Mime Type field of type text.

To create a new field named mimetype on the original item and which contains the MIME type of the file, add the following element in your configuration and rebuild your search indexes:

<field fieldName="mimetype" sourceField="MediaItem" referencedFieldName="Mime Type">Coveo.SearchProvider.ComputedFields.ReferencedFieldComputedField, Coveo.SearchProviderBase</field>

Here are the properties and what they refer to:

• fieldName: The resulting name of the field in the Coveo index.
• sourceField: The name of the field in your indexable item that have a value to be replaced.
• referencedFieldName: The name of the field on the referenced item that contains the value to be used.