Struct RenameHints 

pub struct RenameHints {
    pub fields: BTreeMap<(String, String), String>,
    pub models: BTreeMap<String, String>,
    pub allow_model_drops: BTreeSet<String>,
    pub allow_field_drops: BTreeSet<(String, String)>,
}

Explicit rename pairs, plus explicit drop approvals.

The autodetector never infers renames from similarity; a missing hint becomes remove+add (and is refused when the two sides have the same shape). When the drop is intentional, approve it with allow_drop_model / allow_drop_field instead of splitting the change across two migrations.

Fields

fields: BTreeMap<(String, String), String>

(model_name, old_field_name) → new_field_name.

models: BTreeMap<String, String>

old_model_name → new_model_name.

allow_model_drops: BTreeSet<String>

from-side model names that may be deleted even when a same-shaped model is created.

allow_field_drops: BTreeSet<(String, String)>

(model_name, field_name) pairs on the from side that may be removed even when a same-shaped field is added.

Implementations

impl RenameHints

pub fn new() -> Self

No hints.

pub fn rename_field( self, model: impl Into<String>, old_name: impl Into<String>, new_name: impl Into<String>, ) -> Self

Record that model.old_name became new_name.

pub fn rename_model( self, old_name: impl Into<String>, new_name: impl Into<String>, ) -> Self

Record that model old_name became new_name.

pub fn allow_drop_model(self, name: impl Into<String>) -> Self

Approve deleting model name even when a same-shaped model is created in the same diff. Use this when the drop is intentional and the new model is genuinely unrelated (the autodetector cannot tell that apart from a rename, so it refuses without an explicit answer).

pub fn allow_drop_field( self, model: impl Into<String>, field: impl Into<String>, ) -> Self

Approve removing field field of model even when a same-shaped field is added in the same diff.

Trait Implementations

impl Clone for RenameHints

fn clone(&self) -> RenameHints

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for RenameHints

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for RenameHints

fn default() -> RenameHints

Returns the “default value” for a type.

impl Eq for RenameHints

impl PartialEq for RenameHints

fn eq(&self, other: &RenameHints) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for RenameHints