Function diff_with 

pub fn diff_with(
    from: &ProjectState,
    to: &ProjectState,
    hints: &RenameHints,
) -> Result<Vec<Operation>, MigrationError>

diff honouring explicit field- and model-rename hints.

Errors

MigrationError::State when a model or field is deleted and another of the same shape is created without a rename hint (that would drop data).