Attachment fields are triggered in the field.edit.before stage, before adding or deleting files.

Parameters

Parameter	Description	Type
fieldName	api_name of the field that triggered the event	String
objApiName	api_name of the object that triggered the event	String
dataIndex	dataIndex of the record that triggered the event, used for detail-object data	String
type	add, meaning the action is adding files	String
selectFileParams	Parameters that will be used to open the attachment picker control. These can be modified in the plugin	Object

Delete:

Parameter	Description	Type
type	del, meaning the action is deleting files	String
fileInfos	Attachments about to be deleted	Array

Return Value

Parameter	Description	Type
consumed	true means subsequent logic will not continue	Boolean
selectObjectParams	Parameters that will be used to open the object picker	Object
selectObject	Object-selection method (async). The plugin handles the selection logic and returns the selected data. Multi-select is supported	Function

fileInfo properties

Property	Description	Type
filename	File name	String
ext	File extension	Object
size	File size in bytes	Number
path	Uploaded images may have a path	String
fileId	Only available for cloud-disk files (not guaranteed)	String
filePath	Local file path (not guaranteed)	String

Code Example

Implement the selection control in the plugin and replace the default picker:

{
    event: "field.edit.before",
    functional: function (pluginExecResult, options) {
      	let selectFile = async function(params){
          let fileInfos=[]
          return {fileInfos}
        }
      	return {selectFile}
    }
}

Notes

• Calling dataUpdater to update data in this event is not suitable.
• When editing existing data, fileId and filePath may not be available.