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Kibana Guide [7.9] » Stack Management » Index patterns and fields » String field formatters
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String field formattersedit

String fields support the String and Url formatters.

The String field formatter can apply the following transformations to the field’s contents:

  • Convert to lowercase
  • Convert to uppercase
  • Convert to title case
  • Apply the short dots transformation, which replaces the content before a . character with the first character of that content, as in the following example:

Original

Becomes

com.organizations.project.ClassName

c.o.p.ClassName

The Url field formatter can take on the following types:

  • The Link type turn the contents of the field into an URL.
  • The Image type can be used to specify an image directory where a specified image is located.
  • The Audio type can be used to specify an audio directory where a specified audio file is located.

For an Image type you can specify width and height attributes. These will be used to set the max width / max height of the image, while keeping the aspect ratio. Image will not be upscaled if it’s smaller than the provided size parameters.

You can customize either type of URL field formats with templates. A URL template enables you to add specific values to a partial URL. Use the string {{value}} to add the contents of the field to a fixed URL.

For example, when:

  • A field contains a user ID
  • That field uses the Url field formatter
  • The URI template is http://company.net/profiles?user_id={­{value}­}

The resulting URL replaces {{value}} with the user ID from the field.

The {{value}} template string URL-encodes the contents of the field. When a field encoded into a URL contains non-ASCII characters, these characters are replaced with a % character and the appropriate hexadecimal code. For example, field contents users/admin result in the URL template adding users%2Fadmin.

When the formatter type is set to Image, the {{value}} template string specifies the name of an image at the specified URI.

When the formatter type is set to Audio, the {{value}} template string specifies the name of an audio file at the specified URI.

In order to pass unescaped values directly to the URL, use the {{rawValue}} string.

A Label Template enables you to specify a text string that displays instead of the raw URL. You can use the {{value}} template string normally in label templates. You can also use the {{url}} template string to display the formatted URL.

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