What's the difference between type and ui_type?

type vs ui_type

type is the underlying data type stored in the database — string, double, boolean, etc. ui_type is purely presentational — it tells the content editor which input to render (textfield, select, image-upload, currency-input, and so on) and has no effect on the API or how the value is stored. Example: a boolean column can use ui_type: "toggle" or ui_type: "select" — same stored value, different editor input.