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In our case, we use this feature, for example, to differentiate between types of documents that we're displaying on data warehouses by using icons instead of displaying the whole category of the document in screen.

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Schema Details

Property	Type	Description	Required	Default

Descriptionmap_filestr-Path to the file that contains the mapping for this dynamic field.altOptional[str]'default'Alt option for display in case the specified mimetype does not exist in the map.

_MimeFieldUI Class

	Enum
type	string	The type of field.	No	mime_type	mime_type
label	string/null	Label to show for this field.	No	null
css_style	object/null	Style to apply in the HTML of the UI.	No	null
css_class	string/null	CSS class to apply in the HTML component.	No	null
translate	string/null	Translation key for the field.	No	null
translate_label	string/null	Translation key for the label.	No	null
analytics	object/null	Analytics configuration.	No	null
if_not_exist	string/null	Show only if the specified field doesn't exist.	No	null
if_exist	string/null	Show only if the specified field does exist.	No	null
only_on_highlight	boolean	Show only when the value is highlighted.	No	false
display	any/array/null	Value from the field.	No	null
field	string	Path to field from which to retrieve the value (in JMESPath format).	Yes
field_highlight	string/null	Path to highlight field from which to retrieve the value, in case it is not the same as the field parameter (in JMESPath format).	No	null
default	any	Default value to use in case no value was found for the field.	No	null
transform	array/string/null	List of transformations to apply to the displayed values.	No	null
suffix	string/null	Suffix to append to the value or values.	No	null
prefix	string/null	Prefix to append to the value or values.	No	null
suffix_label	string/null	Suffix to append to the label of the field.	No	null
prefix_label	string/null	Prefix to append to the label of the field.	No	null
sort	string/boolean	Sort order for values in an array.	No	false	asc, desc
unique	boolean	If the values are in an array, remove the duplicates.	No	false
show_blank	boolean	If there is no value, or value is null, and show_blank is true, keep the field.	No	false
replacement	string/null	Replacement string for matches in the transformations `Transformation.REPLACE_FIRST`, `Transformation.REPLACE_LAST`, and `Transformation.REPLACE_ALL`.	No	null
pattern	string/null	Pattern used to look for matches in the transformations `Transformation.REPLACE_FIRST`, `Transformation.REPLACE_LAST`, and `Transformation.REPLACE_ALL`.	No	null
map_file	string	Path to the file that contains the mapping for this dynamic field.	Yes
alt	string/null	This is the alt option for display in case the specified MIME type does not exist in the map.	No	default

PropertyTypeDefaultDescriptiontypeLiteral[DynamicFieldType.MIME_TYPE]DynamicFieldType.MIME_TYPEType of the field (Literal with value DynamicFieldType.MIME_TYPE).

Mapping

Since we have separated the front end from the backend, we made this field work with a map that maps the content of a field in the database (example Category) with it's corresponding Mime icon path in the UI. Our recommendation is to place the map at config/stages/fields/mimetype/ but you can give any path to the map_file property in the configuration.

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Code Block

language	py
theme	DJango

{
    "Documentary": "src/assets/Icons/documento.svg",
    "default": "src/assets/Icons/filas-de-la-tabla.svg"
}

Example JSON Representation

Code Block

language	js
theme	DJango

{
  "type": "mime_type",
  "label": "Document Type",
  "css_style": null,
  "css_class": null,
  "translate": null,
  "translate_label": null,
  "analytics": null,
  "if_not_exist": null,
  "if_exist": null,
  "only_on_highlight": false,
  "display": "src/assets/Icons/documento.svg",
  "field": "file.mime_type",
  "field_highlight": null,
  "default": null,
  "transform": null,
  "suffix": null,
  "prefix": null,
  "suffix_label": null,
  "prefix_label": null,
  "sort": false,
  "unique": false,
  "show_blank": false,
  "replacement": null,
  "pattern": null,
  "map_file": "/path/to/mime_type_map.json",
  "alt": "default"
}

Code Example

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of Usage

Code Block

language	py
theme	DJango

thumbnail=mime_field_example = MimeField(
	field='metadata.genres[0].name', 
	map_file='config/stages/fields/mimetype/mime_maps.json'
)

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