Trait TreeIdentity

pub trait TreeIdentity {
    // Required methods
    fn auto_id<'a, I>(descendents: I) -> Result<bool, ToqlError>
       where I: Iterator<Item = FieldPath<'a>>;
    fn set_id<'a, 'b, I>(
        &mut self,
        descendents: I,
        action: &'b IdentityAction,
    ) -> Result<(), ToqlError>
       where I: Iterator<Item = FieldPath<'a>> + Clone;
}

Deal with primary and foreign keys in nested structs.

Required Methods

fn auto_id<'a, I>(descendents: I) -> Result<bool, ToqlError>

where I: Iterator<Item = FieldPath<'a>>,

Returns true, if struct located at descendents has database generated keys.

fn set_id<'a, 'b, I>( &mut self, descendents: I, action: &'b IdentityAction, ) -> Result<(), ToqlError>

where I: Iterator<Item = FieldPath<'a>> + Clone,

Set or refresh keys of structs located at descendents.

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementors

impl<T> TreeIdentity for Join<T>

where T: Keyed + TreeIdentity, <T as Keyed>::Key: Clone + TryFrom<Vec<SqlArg>, Error = ToqlError>,