Is it possible to show list of all possible values in dropdown when using Smart Action's form field with "reference"

[arnaud]

My bad @Shriram_Balakrishnan,

This is what you need:

actions: [{
    name: 'Create Post',
    fields: [{
      field: 'user',
      reference: "users.id",
      isRequired: true,
      widget: 'belongsto select'   
  }]
}]