rustyroad 1.5.0

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.
Documentation 
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//! Serialization of a stored plan.

use super::super::ops::Plan;

/// Storage shape of a plan; only completion-relevant fields are kept.
#[derive(serde::Serialize, serde::Deserialize)]
pub(super) struct Stored {
    statements: Vec<String>,
    backfill_tables: Vec<String>,
    promotions: Vec<(String, String)>,
    drops: Vec<(String, String)>,
    renames: Vec<(String, String, String)>,
    deferred_not_null: Vec<(String, String)>,
}

/// Serializes a plan for storage.
pub(super) fn encode(plan: &Plan) -> String {
    serde_json::to_string(&Stored::from(plan)).unwrap_or_default()
}

/// Deserializes a stored plan.
pub(super) fn decode(encoded: &str) -> Option<Plan> {
    serde_json::from_str::<Stored>(encoded).ok().map(Into::into)
}

impl From<&Plan> for Stored {
    fn from(plan: &Plan) -> Self {
        Self {
            statements: plan.statements.clone(),
            backfill_tables: plan.backfill_tables.clone(),
            promotions: plan.promotions.clone(),
            drops: plan.drops.clone(),
            renames: plan.renames.clone(),
            deferred_not_null: plan.deferred_not_null.clone(),
        }
    }
}

impl From<Stored> for Plan {
    fn from(stored: Stored) -> Self {
        Self {
            statements: stored.statements,
            backfill_tables: stored.backfill_tables,
            promotions: stored.promotions,
            drops: stored.drops,
            renames: stored.renames,
            deferred_not_null: stored.deferred_not_null,
        }
    }
}