Struct DerivationDef 

pub struct DerivationDef {

    pub name: &'static str,
    pub model: &'static str,
    pub child_table: &'static str,
    pub child_pk: &'static str,
    pub child_soft_delete: bool,
    pub fk_column: &'static str,
    pub parent_table: &'static str,
    pub parent_pk: &'static str,
    pub column: &'static str,
    pub transform: &'static str,
    pub filter: &'static str,
    pub filter_sql: &'static str,
    pub contrib_sql: &'static str,
    pub tenant_column: Option<&'static str>,
    pub module_path: &'static str,
    pub file: &'static str,
    pub line: u32,
}

One #[derivation], produced at compile time by #[model].

Framework plumbing; not constructed by hand. Every field is pub and const-constructible because #[model] emits a static of this type.

Fields

name: &'static str

Stable identity, "{parent_table}.{column}" unless overridden. This is the _autumn_derivations primary key and the name the actuator reports.

model: &'static str

The child model’s type name, for diagnostics.

child_table: &'static str

The child’s table.

child_pk: &'static str

The child’s primary-key column.

child_soft_delete: bool

Whether the child carries a deleted_at column, so the derivation reflects live rows only.

fk_column: &'static str

The child’s foreign-key column naming the parent.

parent_table: &'static str

The parent’s table.

parent_pk: &'static str

The parent’s primary-key column.

column: &'static str

The maintained column on the parent.

transform: &'static str

The aggregate as declared: "count" or "sum(<field>)".

filter: &'static str

The filter’s source text, "" when there is none. Reported, never executed. Self::filter_sql is what runs.

filter_sql: &'static str

The filter lowered to SQL: "", or AND (<pred>) using {c} for the child alias.

contrib_sql: &'static str

The per-row contribution in SQL: "1", or a child column reference.

tenant_column: Option<&'static str>

The tenant-discriminator column, from tenant = "<column>".

module_path: &'static str

The module the derivation was declared in, for diagnostics.

file: &'static str

The source file, for diagnostics.

line: u32

The source line, for diagnostics.

Implementations

impl DerivationDef

pub fn definition_hash(&self) -> String

A content address for the derivation’s shape.

Lowercase hex SHA-256 over the length-prefixed, labelled fields that decide what the maintained value is: tables, keys, columns, transform, lowered filter, contribution and tenant column. Deliberately not the name, model, module path, file, line or filter source, so renaming a derivation or reformatting its filter does not enqueue a backfill of an unchanged value. Changing the filter, the transform or the column always does.

Trait Implementations

impl Debug for DerivationDef

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

Formats the value using the given formatter.