Struct MigratedSchema 

pub struct MigratedSchema { /* private fields */ }

What the migrations so far leave in the database: columns with their types, checks and indexes.

Implementations

impl Schema

pub fn read(&mut self, migration: &Lexed)

pub fn check_literals( &self, table: &str, column: &str, ) -> Option<Vec<Vec<&str>>>

The literals of each CHECK on the column, one list per CHECK, since only a single CHECK listing every value admits them all.

pub fn knows_table(&self, table: &str) -> bool

pub fn has_column(&self, table: &str, column: &str) -> bool

pub fn columns(&self, table: &str) -> Vec<&str>

pub fn is_unique(&self, table: &str, column: &str) -> bool

pub fn is_unique_over(&self, table: &str, columns: &[&str]) -> bool

pub fn has_type( &self, table: &str, column: &str, sql_type: &str, ) -> Option<bool>

Under any of Postgres’s names for the type: int8 is a bigint, varchar(20) a text.

pub fn is_nullable(&self, table: &str, column: &str) -> Option<bool>

pub fn is_indexed(&self, table: &str, column: &str) -> bool

An index leading with the column serves a lookup by it.

pub fn has_index(&self, name: &str) -> bool

Trait Implementations

impl Debug for Schema

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

Formats the value using the given formatter.

impl Default for Schema

fn default() -> Self

Returns the “default value” for a type.