Trait toql_core::tree::tree_identity::TreeIdentity

pub trait TreeIdentity {
    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.

Implementors

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