Method has_index

sea-orm-migration/src/manager.rs:134–159

(&self, _table: T, _index: I)

    }

    pub async fn has_index<T, I>(&self, _table: T, _index: I) -> Result<bool, DbErr>
    where
        T: AsRef<str>,
        I: AsRef<str>,
    {
        let _stmt: SelectStatement = match self.conn.get_database_backend() {
            #[cfg(feature = "sqlx-mysql")]
            DbBackend::MySql => sea_schema::mysql::MySql.has_index(_table, _index),
            #[cfg(feature = "sqlx-postgres")]
            DbBackend::Postgres => sea_schema::postgres::Postgres.has_index(_table, _index),
            #[cfg(feature = "sqlx-sqlite")]
            DbBackend::Sqlite => sea_schema::sqlite::Sqlite.has_index(_table, _index),
            #[allow(unreachable_patterns)]
            other => panic!("{other:?} feature is off"),
        };

        #[allow(unreachable_code)]
        let builder = self.conn.get_database_backend();
        let res = self
            .conn
            .query_one(builder.build(&_stmt))
            .await?
            .ok_or_else(|| DbErr::Custom("Failed to check index exists".to_owned()))?;

        res.try_get("", "has_index")
    }
}

pub(crate) async fn has_table<C, T>(conn: &C, _table: T) -> Result<bool, DbErr>