rustyroad 1.8.0

Rusty Road is a framework written in Rust that is based on Ruby on Rails. It is designed to provide the familiar conventions and ease of use of Ruby on Rails, while also taking advantage of the performance and efficiency of Rust.
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//! Column drop, rename, and constraint statements at completion.

use super::super::quote_ident;
use super::super::Plan;

impl Plan {
    /// Drops columns removed by this version.
    pub(super) fn drop_columns(&self) -> Vec<String> {
        self.drops
            .iter()
            .map(|(table, column)| {
                format!(
                    "ALTER TABLE {} DROP COLUMN IF EXISTS {}",
                    quote_ident(table),
                    quote_ident(column)
                )
            })
            .collect()
    }

    /// Applies renames declared by this version.
    pub(super) fn rename_columns(&self) -> Vec<String> {
        self.renames
            .iter()
            .map(|(table, from, to)| {
                format!(
                    "ALTER TABLE {} RENAME COLUMN {} TO {}",
                    quote_ident(table),
                    quote_ident(from),
                    quote_ident(to)
                )
            })
            .collect()
    }

    /// Applies NOT NULL constraints deferred until the backfill completed.
    pub(super) fn apply_not_null(&self) -> Vec<String> {
        self.deferred_not_null
            .iter()
            .map(|(table, column)| {
                format!(
                    "ALTER TABLE {} ALTER COLUMN {} SET NOT NULL",
                    quote_ident(table),
                    quote_ident(column)
                )
            })
            .collect()
    }
}